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How to limit the number of responses to my for loop to 3 in Django Templates?

In my current Django template I have two models in use, which are defined in my views.py as:
'tasks' : IndividualTask.objects.all(),
'updates' : TaskUpdate.objects.all(),
I have set up signals so that when there is an update to a task, an update is created.
Currently, I iterate through each task, then each of their updates and pull out the relevant updates for each task, as shown below.
{% for task in tasks %}
{% for update in updates %}
{% if task.id == update.task.id %}
{{ update.update }}
{% endif %}
{% endfor %}
{% endfor %}
However, I would like to limit the number of updates I show to three.
I have tried using slice, show below, but this limits all updates to the top 3 of all updates as opposed to the top 3 of each individual task's updates.
{% for task in tasks %}
{% for update in updates|slice:":3" %}
{% if task.id == update.task.id %}
{{ update.update }}
{% endif %}
{% endfor %}
{% endfor %}
Models.py is as below:
class IndividualTask(models.Model):
task = models.CharField(
max_length = 256,
blank=False,
null=True,
)
task_description = models.CharField(
max_length = 256,
blank=False,
null=True,
)
expected_completion = models.DateField(
max_length = 64,
null=True,
)
goal = models.ForeignKey(
IndividualGoal,
on_delete=models.CASCADE,
related_name="goals",
blank=False,
null=True,
)
creator = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name="creator",
blank=False,
null=True,
)
owner = models.ForeignKey(
User,
on_delete=models.CASCADE,
blank=False,
null=True,
)
status_choices = [
("", "Select Current Status"),
("Preparation", "Preparation"),
("Review", "Review"),
("Update", "Update"),
("Finalised", "Finalised"),
]
current_status = models.CharField(
max_length=32,
choices = status_choices,
default = "Select current status",
)
created = models.DateField(
auto_now_add = True,
)
def __str__(self):
return f"{self.task}"
class TaskUpdate(models.Model):
update = models.CharField(
max_length = 5000,
)
task = models.ForeignKey(
IndividualTask,
on_delete=models.CASCADE,
null = True,
)
update_created = models.DateField(
auto_now_add = True,
)
update_time_created = models.TimeField(
auto_now_add = True,
)
author = models.ForeignKey(
User,
on_delete=models.CASCADE,
related_name="update_author",
blank=True,
null=True,
)
update_choices = [
("New Task", "New Task"),
("New Commentary", "New Commentary"),
]
update_status = models.CharField(
max_length=32,
choices = update_choices,
null = True,
)
class Meta:
ordering = ["-update_created", "-update_time_created"]
I would be grateful for any advice as to how I can limit the number of updates shown for each task to 3 please?
EDIT:
Full traceback shown below:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/tasks/
Django Version: 4.0.2
Python Version: 3.9.10
Installed Applications:
['tasks.apps.TasksConfig',
'notes',
'accounts',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Template error:
In template /Users/Tom/Desktop/squeasy/tasks/templates/tasks/tasks.html, error at line 69
'RelatedManager' object is not iterable
59 : Expected Completion Date
60 : </div>
61 : <div class = expected_completion>
62 : {{ task.expected_completion }}
63 : </div>
64 : </div>
65 : </div>
66 : <div class = task_sub_header>
67 : Latest updates:
68 : </div>
69 : {% for update in task.taskupdate_set|slice:":3" %}
70 : {% if task.id == update.task.id %}
71 : <div class = individual_update>
72 : {% if update.update_status == "New Task" %}
73 : {{ update.author }} created this task on {{ update.update_created|date:"l jS F" }} at {{ update.update_time_created|time:"H:i" }}
74 : {% elif update.update_status == "New Commentary" %}
75 : {{ update.author }} updated the commentary for {{ update.task }} on {{ update.update_created|date:"l jS F" }} at {{ update.update_time_created|time:"H:i" }}
76 : {% endif %}
77 : </div>
78 : {% endif %}
79 : {% endfor %}
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/django/core/handlers/exception.py", line 47, in inner
response = get_response(request)
File "/usr/local/lib/python3.9/site-packages/django/core/handlers/base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/Tom/Desktop/squeasy/tasks/views.py", line 28, in tasks
return render(request, "tasks/tasks.html", context)
File "/usr/local/lib/python3.9/site-packages/django/shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "/usr/local/lib/python3.9/site-packages/django/template/loader.py", line 62, in render_to_string
return template.render(context, request)
File "/usr/local/lib/python3.9/site-packages/django/template/backends/django.py", line 61, in render
return self.template.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 176, in render
return self._render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 168, in _render
return self.nodelist.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 977, in render
return SafeString(''.join([
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 978, in <listcomp>
node.render_annotated(context) for node in self
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/loader_tags.py", line 153, in render
return compiled_parent._render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 168, in _render
return self.nodelist.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 977, in render
return SafeString(''.join([
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 978, in <listcomp>
node.render_annotated(context) for node in self
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/loader_tags.py", line 65, in render
result = block.nodelist.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 977, in render
return SafeString(''.join([
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 978, in <listcomp>
node.render_annotated(context) for node in self
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/defaulttags.py", line 298, in render
return nodelist.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 977, in render
return SafeString(''.join([
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 978, in <listcomp>
node.render_annotated(context) for node in self
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/defaulttags.py", line 217, in render
nodelist.append(node.render_annotated(context))
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/defaulttags.py", line 217, in render
nodelist.append(node.render_annotated(context))
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/defaulttags.py", line 298, in render
return nodelist.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 977, in render
return SafeString(''.join([
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 978, in <listcomp>
node.render_annotated(context) for node in self
File "/usr/local/lib/python3.9/site-packages/django/template/base.py", line 938, in render_annotated
return self.render(context)
File "/usr/local/lib/python3.9/site-packages/django/template/defaulttags.py", line 173, in render
values = list(values)
Exception Type: TypeError at /tasks/
Exception Value: 'RelatedManager' object is not iterable

In the context you can pass the IndividualTasks with the TaskUpdates ordered in descending order with a Prefetch object [Django-doc]:
from django.db.models import Prefetch
context = {
'tasks' : IndividualTask.objects.prefetch_related(
Prefetch('taskupdate_set', TaskUpdate.objects.order_by('-update_created', '-update_time_created'))
)
}
then in the template you enumerate over the taskupdate_set:
{% for task in tasks %}
{% for update in task.taskupdate_set.all|slice:":3" %}
{{ update.update }}
{% endfor %}
{%endfor %}
Note: It is normally better to make use of the settings.AUTH_USER_MODEL [Django-doc] to refer to the user model, than to use the User model [Django-doc] directly. For more information you can see the referencing the User model section of the documentation.

Exception Value: __str__ returned non-string (type int) in django model

I want to create a function that returns the list of last points per vehicle that have sent navigation data in the last 48 hours. I create a view it works and it displays name correctly but when I want to add new Vehicle from Django Admin panel it shows an error.
TypeError at /admin/navigation/navigationrecord/add/
str returned non-string (type int)
How can I fixed it? And is there a more afformative and efficient way to list data over the past 48 hours?
models.py
class Vehicle(models.Model):
id = models.IntegerField(primary_key=True)
plate = models.CharField(max_length=30)
def __str__(self):
return str(self.plate)
class NavigationRecord(models.Model):
id = models.IntegerField(primary_key=True)
vehicle = models.ForeignKey(Vehicle, on_delete=models.CASCADE)
datetime = models.DateField(default=timezone.now)
latitude = models.FloatField()
longitude = models.FloatField()
def __str__(self):
return self.vehicle
views.py
def get_48_hours(request):
time_48 = datetime.now() - timedelta(hours=48)
results = NavigationRecord.objects.filter(datetime__gte=time_48)
context = {
'results': results,
}
return render(request, 'navigation.html', context)
navigation.html
<table class="table table-hover">
<thead>
<tr>
<th>ID</th>
<th>Vehicle</th>
</tr>
</thead>
<tbody>
{% for result in results %}
<tr>
<td>{{result.id}}</td>
<td>{{result.vehicle}}</td>
<td>{{result.datetime}}</td>
</tr>
{% endfor %}
</tbody>
</table>
admin.py
models = [Vehicle, NavigationRecord]
admin.site.register(models)
traceback
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/navigation/navigationrecord/add/
Django Version: 2.2.13
Python Version: 3.7.0
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'navigation']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Template error:
In template C:\Users\edeni\senior\myenv\lib\site-packages\django\contrib\admin\templates\admin\includes\fieldset.html, error at line 19
__str__ returned non-string (type int)
9 : {% for field in line %}
10 : <div{% if not line.fields|length_is:'1' %} class="fieldBox{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}"{% elif field.is_checkbox %} class="checkbox-row"{% endif %}>
11 : {% if not line.fields|length_is:'1' and not field.is_readonly %}{{ field.errors }}{% endif %}
12 : {% if field.is_checkbox %}
13 : {{ field.field }}{{ field.label_tag }}
14 : {% else %}
15 : {{ field.label_tag }}
16 : {% if field.is_readonly %}
17 : <div class="readonly">{{ field.contents }}</div>
18 : {% else %}
19 : {{ field.field }}
20 : {% endif %}
21 : {% endif %}
22 : {% if field.field.help_text %}
23 : <div class="help">{{ field.field.help_text|safe }}</div>
24 : {% endif %}
25 : </div>
26 : {% endfor %}
27 : </div>
28 : {% endfor %}
29 : </fieldset>
Traceback:
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\core\handlers\base.py" in _get_response
145. response = self.process_exception_by_middleware(e, request)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\core\handlers\base.py" in _get_response
143. response = response.render()
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\response.py" in render
106. self.content = self.rendered_content
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\response.py" in rendered_content
83. content = template.render(context, self._request)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\backends\django.py" in render
61. return self.template.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
171. return self._render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\loader_tags.py" in render
150. return compiled_parent._render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\loader_tags.py" in render
150. return compiled_parent._render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\loader_tags.py" in render
62. result = block.nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\loader_tags.py" in render
62. result = block.nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\loader_tags.py" in render
188. return template.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
173. return self._render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\defaulttags.py" in render
309. return nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\defaulttags.py" in render
309. return nodelist.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render
993. return render_value_in_context(output, context)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\template\base.py" in render_value_in_context
972. value = str(value)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\utils\html.py" in <lambda>
388. klass.__str__ = lambda self: mark_safe(klass_str(self))
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\boundfield.py" in __str__
33. return self.as_widget()
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\boundfield.py" in as_widget
93. renderer=self.form.renderer,
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\widgets.py" in render
241. context = self.get_context(name, value, attrs)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\contrib\admin\widgets.py" in get_context
288. 'rendered_widget': self.widget.render(name, value, attrs),
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\widgets.py" in render
241. context = self.get_context(name, value, attrs)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\widgets.py" in get_context
678. context = super().get_context(name, value, attrs)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\widgets.py" in get_context
639. context['widget']['optgroups'] = self.optgroups(name, context['widget']['value'], attrs)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\widgets.py" in optgroups
587. for index, (option_value, option_label) in enumerate(self.choices):
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\models.py" in __iter__
1138. yield self.choice(obj)
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\models.py" in choice
1150. return (self.field.prepare_value(obj), self.field.label_from_instance(obj))
File "C:\Users\edeni\senior\myenv\lib\site-packages\django\forms\models.py" in label_from_instance
1216. return str(obj)
Exception Type: TypeError at /admin/navigation/navigationrecord/add/
Exception Value: __str__ returned non-string (type int)

If you look at the stracktrace, it literally says: __str__ returned non-string (type int).
This is caused by your NavigationRecord' __str__ method which returns self.vehicle which is the foreignkey, thus a integer. Try changing this method to return a str of the self.vehicle instead. That should call __str__ on the Vehicle class.
def __str__(self):
return str(self.vehicle)

How to fix TypeError __str__ returned non-string

My code it still gives the error of __str__ returned non-string (type Contact) despite the fact that i cast the return statement with str()
My model:
class Contact(models.Model):
name = models.CharField("Contact Name", max_length=50)
surname = models.CharField("Contact Surname", max_length=50)
company = models.ForeignKey(Customer, verbose_name='Company',on_delete=models.CASCADE)
department = models.ForeignKey(Department, verbose_name='Department',on_delete=models.CASCADE)
position = models.CharField("Position", max_length=50, null=True, blank=True)
birthday = models.DateField("Birthday", null=True, blank=True)
remarks = models.TextField("Remarks", max_length=500, null=True, blank=True)
skype = models.CharField("Spype", max_length=50, null=True, blank=True)
def clean(self):
for field in self._meta.fields:
if isinstance(field, (models.CharField, models.TextField)) and getattr(self, field.name)!=None:
setattr(self, field.name, getattr(self, field.name).strip())
class Meta:
verbose_name = "Contact"
#####Overide save method to store names and surnames in caps
def save(self, *args, **kwargs):
for attr_name in ['name', 'surname', 'position']:
val = getattr(self, attr_name, False)
if val:
setattr(self, attr_name, val.upper())
super(Contact, self).save(*args, **kwargs)
def __str__(self):
return self.surname + " " + self.name
I also used to write the str function like this:
def __str__(self):
return str(self.surname + " " + self.name)
but still the code returns the same error.
Here is my traceback
Django Version: 2.2.6
Python Version: 3.5.2
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.humanize',
'adminactions',
'django.contrib.admin',
'intranet',
'daterange_filter',
'gunicorn',
'notifications')
Installed Middleware:
('whitenoise.middleware.WhiteNoiseMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware')
Template error:
In template /usr/local/lib/python3.5/dist-packages/django/contrib/admin/templates/admin/edit_inline/tabular.html, error at line 33
__str__ returned non-string (type Contact)
23 : <tbody>
24 : {% for inline_admin_form in inline_admin_formset %}
25 : {% if inline_admin_form.form.non_field_errors %}
26 : <tr><td colspan="{{ inline_admin_form|cell_count }}">{{ inline_admin_form.form.non_field_errors }}</td></tr>
27 : {% endif %}
28 : <tr class="form-row {% cycle "row1" "row2" %} {% if inline_admin_form.original or inline_admin_form.show_url %}has_original{% endif %}{% if forloop.last and inline_admin_formset.has_add_permission %} empty-form{% endif %}"
29 : id="{{ inline_admin_formset.formset.prefix }}-{% if not forloop.last %}{{ forloop.counter0 }}{% else %}empty{% endif %}">
30 : <td class="original">
31 : {% if inline_admin_form.original or inline_admin_form.show_url %}<p>
32 : {% if inline_admin_form.original %}
33 : {{ inline_admin_form.original }}
34 : {% if inline_admin_form.model_admin.show_change_link and inline_admin_form.model_admin.has_registered_model %}{% if inline_admin_formset.has_change_permission %}{% trans "Change" %}{% else %}{% trans "View" %}{% endif %}{% endif %}
35 : {% endif %}
36 : {% if inline_admin_form.show_url %}{% trans "View on site" %}{% endif %}
37 : </p>{% endif %}
38 : {% if inline_admin_form.needs_explicit_pk_field %}{{ inline_admin_form.pk_field.field }}{% endif %}
39 : {% if inline_admin_form.fk_field %}{{ inline_admin_form.fk_field.field }}{% endif %}
40 : {% spaceless %}
41 : {% for fieldset in inline_admin_form %}
42 : {% for line in fieldset %}
43 : {% for field in line %}
Traceback:
File "/usr/local/lib/python3.5/dist-packages/django/core/handlers/exception.py" in inner
34. response = get_response(request)
File "/usr/local/lib/python3.5/dist-packages/django/core/handlers/base.py" in _get_response
145. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.5/dist-packages/django/core/handlers/base.py" in _get_response
143. response = response.render()
File "/usr/local/lib/python3.5/dist-packages/django/template/response.py" in render
106. self.content = self.rendered_content
File "/usr/local/lib/python3.5/dist-packages/django/template/response.py" in rendered_content
83. content = template.render(context, self._request)
File "/usr/local/lib/python3.5/dist-packages/django/template/backends/django.py" in render
61. return self.template.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
171. return self._render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in _render
163. return self.nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/loader_tags.py" in render
150. return compiled_parent._render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in _render
163. return self.nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/loader_tags.py" in render
150. return compiled_parent._render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in _render
163. return self.nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/loader_tags.py" in render
62. result = block.nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/loader_tags.py" in render
62. result = block.nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/loader_tags.py" in render
188. return template.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
173. return self._render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in _render
163. return self.nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/defaulttags.py" in render
209. nodelist.append(node.render_annotated(context))
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/defaulttags.py" in render
309. return nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/defaulttags.py" in render
309. return nodelist.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
937. bit = node.render_annotated(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_annotated
904. return self.render(context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render
993. return render_value_in_context(output, context)
File "/usr/local/lib/python3.5/dist-packages/django/template/base.py" in render_value_in_context
972. value = str(value)
Exception Type: TypeError at /private/intranet/contact/742/change/
Exception Value: __str__ returned non-string (type Contact)
my view
#staff_member_required#login is required
def contact_view(request, intranet_contact_id):
contact = Contact.objects.get(id = intranet_contact_id)
emails = Contact_email.objects.filter(contact_name = intranet_contact_id)
phones = Contact_Phone.objects.filter(contact_name = intranet_contact_id)
other_company_contacts = Contact.objects.filter(company = contact.company.id).exclude(pk= intranet_contact_id)
return render(request,'contact/details.html', dict(contact = contact, emails = emails, phones = phones, other_company_contacts = other_company_contacts))
admin.py
class ContactAdmin(ReadPermissionModelAdmin):
list_display = ['show_name', 'company', 'department', 'position', 'show_details','skype']
list_filter = ['company']
search_fields = ('surname', 'name', 'company__customer_name','skype')
inlines = [Contact_PhoneInline, Contact_emailInline]
#alphabet_filter = 'remarks'
#DEFAULT_ALPHABET = u'T'
formfield_overrides = {
models.CharField: {'widget': TextInput(attrs={'size':'25'})},
models.BigIntegerField: {'widget': TextInput(attrs={'size':'25'})},
models.TextField: {'widget': Textarea(attrs={'rows':6, 'cols':40})},
}
fieldsets = (
(None, {
'fields': (('name', 'surname'), ('company', 'department'), ('position', 'birthday'), ('skype'), ('remarks'),)
}),
)
list_per_page = 20
def response_change(self, request, obj, post_url_continue=None):
#This makes the response go to contact full detail page for an edited order
return HttpResponseRedirect(reverse('contacts', args=(obj.id,)))
#return HttpResponseRedirect("../../contacts/%s/" % obj.id)
def response_add(self, request, obj, post_url_continue=None):
#This makes the response go to contact full detail page for a newlly added order to inquiry list
return HttpResponseRedirect(reverse('contacts', args=(obj.id,)))
#return HttpResponseRedirect("../../contacts/%s/" % obj.id)
def show_name(self, obj):
return obj
show_name.short_description = 'Name'
show_name.admin_order_field = 'surname'
def show_details(self, obj):
#sos
#return 'Details' % (obj.id)
return format_html('Details',str(obj.id))
show_details.allow_tags = True
show_details.short_description = 'Details'
admin.site.register(Contact, ContactAdmin)
How can i deal wih that?

Try changing the show_name function to:
def show_name(self, obj):
return obj.__str__()
show_name.short_description = 'Name'
show_name.admin_order_field = 'surname'
A quick test I've done seem to indicate that while it's fine to expect linked object via a foreign key will render their str fine, the instance itself seems to break when I try to either pass the obj back.

The support was very helpful.
Finally i came up with the solution.
The error occured because the str functions of the inline classes related with the Contact model was false.

key error value 0 on modelformset when queryset is empty

i want to create multiple instances of a model using a modelformset.
but when the queryset is empty and the parameter extra is greater than 0 it raises this error:
Environment:
Request Method: GET
Request URL: http://localhost:8000/alta_socies/proces_alta_projecte_autoocupat/adreces/
Django Version: 1.7.7
Python Version: 2.7.9
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.formtools',
'inici',
'alta_socies',
'empreses',
'socies')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware')
Template error:
In template /home/usergci/gestioci/alta_socies/templates/alta_socies/proces_alta_autoocupat.html, error at line 59
0
49 : <div class="row">
50 : <div class="medium-12 columns content">
51 : <div class="row">
52 : <div class="medium-12 columns">
53 : <div class="group">
54 : <h2>{{ projecte.pas }}</h2>
55 : {% block explicacio_pas %}{% endblock %}
56 : </div>
57 : <form method="post" action="">{% csrf_token %}
58 : {{ wizard.management_form }}
59 : {% if wizard.form.forms %}
60 : {{ wizard.form.management_form }}
61 : {% for form in wizard.form.forms %}
62 : {% block step_factory_form %}
63 : {% endblock %}
64 : {% endfor %}
65 : {% else %}
66 : {% block step_single_form %}
67 : {% endblock %}
68 : {% endif %}
69 : <input class="small radius button" type="submit" name="save_only" value="Guardar y salir"/>
Traceback:
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
137. response = response.render()
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/response.py" in render
103. self.content = self.rendered_content
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/response.py" in rendered_content
80. content = template.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
148. return self._render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
126. return compiled_parent._render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
126. return compiled_parent._render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
126. return compiled_parent._render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
402. return strip_spaces_between_tags(self.nodelist.render(context).strip())
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
65. result = block.nodelist.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
65. result = block.nodelist.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
305. match = condition.eval(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/defaulttags.py" in eval
898. return self.value.resolve(context, ignore_failures=True)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in resolve
596. obj = self.var.resolve(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in resolve
734. value = self._resolve_lookup(context)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/template/base.py" in _resolve_lookup
770. current = getattr(current, bit)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/utils/functional.py" in __get__
55. res = instance.__dict__[self.func.__name__] = self.func(instance)
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/forms/formsets.py" in forms
141. forms = [self._construct_form(i) for i in xrange(self.total_form_count())]
File "/home/usergci/.virtualenvs/heteroceras/local/lib/python2.7/site-packages/django/forms/models.py" in _construct_form
591. kwargs['initial'] = self.initial_extra[i - self.initial_form_count()]
Exception Type: KeyError at /alta_socies/proces_alta_projecte_autoocupat/adreces/
Exception Value: 0
the offending lines as far as i debugged are:
AdrecesFormSet = modelformset_factory(AdrecaProjecteAutoocupat,
form=FormulariAdrecaProjecteAutoocupat,
can_delete=True)
any hint?

The wizard form was expecting a list of dicts intead of a dict!!! The problem was somewhere else in the views.py

KeyError at /admin/myapp/userprofile/1/

I upgraded Django from 1.6 to 1.7.
Now I am getting this error in the Admin panel:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/myapp/userprofile/1/
Django Version: 1.7
Python Version: 2.7.6
Installed Applications:
('django.contrib.admin',
'django.contrib.sites',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'myapp',
'feincms',
'rest_framework',
'subdomains',
'social.apps.django_app.default')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'subdomains.middleware.SubdomainURLRoutingMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'social.apps.django_app.middleware.SocialAuthExceptionMiddleware',
'myapp.middleware.SocialAuthExceptionMiddleware')
Template error:
In template /home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 17
manager
7 : <div class="form-row{% if line.fields|length_is:'1' and line.errors %} errors{% endif %}{% if not line.has_visible_field %} hidden{% endif %}{% for field in line %}{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% endfor %}">
8 : {% if line.fields|length_is:'1' %}{{ line.errors }}{% endif %}
9 : {% for field in line %}
10 : <div{% if not line.fields|length_is:'1' %} class="field-box{% if field.field.name %} field-{{ field.field.name }}{% endif %}{% if not field.is_readonly and field.errors %} errors{% endif %}{% if field.field.is_hidden %} hidden{% endif %}"{% elif field.is_checkbox %} class="checkbox-row"{% endif %}>
11 : {% if not line.fields|length_is:'1' and not field.is_readonly %}{{ field.errors }}{% endif %}
12 : {% if field.is_checkbox %}
13 : {{ field.field }}{{ field.label_tag }}
14 : {% else %}
15 : {{ field.label_tag }}
16 : {% if field.is_readonly %}
17 : <p> {{ field.contents }} </p>
18 : {% else %}
19 : {{ field.field }}
20 : {% endif %}
21 : {% endif %}
22 : {% if field.field.help_text %}
23 : <p class="help">{{ field.field.help_text|safe }}</p>
24 : {% endif %}
25 : </div>
26 : {% endfor %}
27 : </div>
Traceback:
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
137. response = response.render()
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/response.py" in render
103. self.content = self.rendered_content
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/response.py" in rendered_content
80. content = template.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
148. return self._render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
126. return compiled_parent._render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
126. return compiled_parent._render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
65. result = block.nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
65. result = block.nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
201. nodelist.append(node.render(context))
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/loader_tags.py" in render
150. return template.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
148. return self._render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in _render
142. return self.nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
201. nodelist.append(node.render(context))
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
201. nodelist.append(node.render(context))
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
312. return nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/defaulttags.py" in render
312. return nodelist.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in render
844. bit = self.render_node(node, context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render_node
80. return node.render(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/debug.py" in render
90. output = self.filter_expression.resolve(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in resolve
596. obj = self.var.resolve(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in resolve
734. value = self._resolve_lookup(context)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/template/base.py" in _resolve_lookup
788. current = current()
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/contrib/admin/helpers.py" in contents
183. f, attr, value = lookup_field(field, obj, model_admin)
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/contrib/admin/utils.py" in lookup_field
280. value = attr()
File "/home/ashish/.virtualenvs/myapp_venv/local/lib/python2.7/site-packages/django/db/models/fields/related.py" in __call__
654. manager = getattr(self.model, kwargs.pop('manager'))
Exception Type: KeyError at /admin/myapp/userprofile/1/
Exception Value: u'manager'
What changes am I supposed to make in the code so I can make it work with Django 1.7?
Do I have to make changes in some related fields ?
Edit:
models.py
from django.db import models
from django.contrib.auth.models import AbstractUser
from django.core.validators import RegexValidator
# Create your models here.
GENDER_CHOICES = (
('M', 'Male'),
('F', 'Female'),
)
class UserProfile(AbstractUser):
dob=models.DateTimeField(blank=True,null=True)
gender = models.CharField(max_length=1, choices=GENDER_CHOICES, null=True,blank=True)
phone_regex = RegexValidator(regex=r'^\+?1?\d{9,15}$', message="Phone number must be entered in the format: '+999999999'. Up to 15 digits allowed.")
phone_number = models.CharField(validators=[phone_regex], blank=True,max_length=16,null=True) # validators should be a list
location=models.CharField(max_length=30,null=True,blank=True)
about=models.CharField(max_length=140,null=True,blank=True)
admin.py
from django.contrib import admin
# Register your models here.
from myapp.models import UserProfile
class user_index_Admin(admin.ModelAdmin):
def get_readonly_fields(self, request, obj=None):
if obj:
return UserProfile._meta.get_all_field_names()
else:
return []
def has_delete_permission(self, request, obj=None):
return False
admin.site.register(UserProfile,user_index_Admin);

The error was in admin class in this line :
return UserProfile._meta.get_all_field_names() . I wanted to make all the fields readonly. I changed the code according to this SO answer and it worked.
admin.py
from django.contrib import admin
# Register your models here.
from myapp.models import UserProfile
class user_index_Admin(admin.ModelAdmin):
def get_readonly_fields(self, request, obj=None):
if obj:
return [f.name for f in self.model._meta.fields]
else:
return []
def has_delete_permission(self, request, obj=None):
return False
admin.site.register(UserProfile,user_index_Admin);