Hi guys i´m using Django 1.7 and mysql to create an application and I´m receiving this error
ValueError at /Cannot create form field for 'radiotipo_idradiotipo' yet, because its related model u'Radioinfo' has not been loaded yet
I don´t know what is this. this error happenes on my forms.py, here´s the code:
forms.py
from django import forms
from models import Node, Datasource, Radio, Radiotipo, Snapshot, Tag, Taginfo, Valores
class NodeForm(forms.ModelForm):
class Meta:
model = Node
class DatasourceForm(forms.ModelForm):
class Meta:
model = Datasource
class RadiotipoForm(forms.ModelForm):
class Meta:
model = Radiotipo
class SnapshotForm(forms.ModelForm):
class Meta:
model = Snapshot
class TagForm(forms.ModelForm):
class Meta:
model = Tag
class TaginfoForm(forms.ModelForm):
class Meta:
model = Taginfo
class ValoresForm(forms.ModelForm):
class Meta:
model = Valores
class RadioForm(forms.ModelForm):
class Meta:
model = Radio
and here is my models.py
class Datasource(models.Model):
objects = GChartsManager()
idestacao_meteo = models.IntegerField(db_column='idDATASOURCE', primary_key=True, editable=False) # Field name made lowercase.
nome_estacao = models.CharField(db_column='NAME', max_length=45) # Field name made lowercase.
fabricante = models.CharField(db_column='MANUFACTURER', max_length=45, blank=True) # Field name made lowercase.
modelo = models.CharField(db_column='MODEL', max_length=45, blank=True) # Field name made lowercase.
node_idnode = models.ForeignKey('Node', db_column='site_idSITE', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'datasource'
class Node(models.Model):
objects = GChartsManager()
idnode = models.IntegerField(db_column='idSITE', primary_key=True, editable=False) # Field name made lowercase.
nome = models.CharField(db_column='NAME', max_length=45) # Field name made lowercase.
informacoes = models.CharField(db_column='DESCRIPTION', max_length=45, blank=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'site'
class Radio(models.Model):
objects = GChartsManager()
idradio = models.IntegerField(db_column='idRADIO', primary_key=True, editable=False)
endreal = models.CharField(db_column='ENDREAL', max_length=64, blank=True) # Field name made lowercase.
radiotipo_idradiotipo = models.ForeignKey('Radioinfo', db_column='radioInfo_idRADIOINFO') # Field name made lowercase.
datasource_idestacao_meteo = models.ForeignKey(Datasource, db_column='datasource_idDATASOURCE', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'radio'
class Radiotipo(models.Model):
objects = GChartsManager()
idradiotipo = models.IntegerField(db_column='idRADIOINFO', primary_key=True, editable=False) # Field name made lowercase.
nome = models.CharField(db_column='NAME', max_length=45)
descricao = models.CharField(db_column='DESCRIPTION', max_length=300, blank=True)
class Meta:
managed = False
db_table = 'radioinfo'
class Snapshot(models.Model):
objects = GChartsManager()
idsnap = models.IntegerField(db_column='idSNAP', primary_key=True, editable=False) # Field name made lowercase.
valor = models.FloatField(db_column='VALUE', blank=True, null=True) # Field name made lowercase.
snapshot = models.DateTimeField(db_column='SNAPSHOT', blank=True, null=True) # Field name made lowercase.
tag_idtag = models.ForeignKey('Tag', db_column='tag_idTAG') # Field name made lowercase.
class Meta:
managed = False
db_table = 'snapshot'
class Tag(models.Model):
objects = GChartsManager()
idtag = models.IntegerField(db_column='idTAG', primary_key=True, editable=False) # Field name made lowercase.
desvio = models.FloatField(db_column='DEVIATION', blank=True, null=True) # Field name made lowercase.
tempo_max = models.IntegerField(db_column='TIME_MAX', blank=True, null=True) # Field name made lowercase.
conv_rate = models.IntegerField(db_column='CONV_RATE', blank=True, null=True) # Field name made lowercase.
taginfo_idtaginfo1 = models.ForeignKey('Taginfo', db_column='tagInfo_idTAGINFO') # Field name made lowercase.
datasource_idestacao_meteo = models.ForeignKey(Datasource, db_column='datasource_idDATASOURCE', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'tag'
class Taginfo(models.Model):
objects = GChartsManager()
idtaginfo = models.IntegerField(db_column='idTAGINFO', primary_key=True, editable=False) # Field name made lowercase.
nome = models.CharField(db_column='NAME', max_length=45) # Field name made lowercase.
descricao = models.CharField(db_column='DESCRIPTION', max_length=255, blank=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'taginfo'
class Valores(models.Model):
objects = GChartsManager()
idvalores = models.IntegerField(db_column='idVALUES', primary_key=True, editable=False) # Field name made lowercase.
valor = models.FloatField(db_column='VALUE') # Field name made lowercase.
datahora = models.DateTimeField(db_column='DATETIME') # Field name made lowercase.
tag_idtag = models.ForeignKey(Tag, db_column='tag_idTAG') # Field name made lowercase.
class Meta:
managed = False
db_table = 'values'
Thanks for helping.
The radiotipo_idradiotipo is a foreign key to a model called "RadioInfo", but you don't have any model called that: only one called "Radiotipo". Is that the one you meant?
Change:
radiotipo_idradiotipo = models.ForeignKey('Radioinfo', db_column='radioInfo_idRADIOINFO') # Field name made lowercase.
By:
radiotipo_idradiotipo = models.ForeignKey('Radiotipo', db_column='radioInfo_idRADIOINFO') # Field name made lowercase.
Notice that you are using the table_name instead of the Model_Name for the foreingkey
Related
I've setup a relationship using django's ForeignKey against 2 unmanaged tables like so:
class Product(BaseModel):
publish_name = models.CharField(unique=True, max_length=40)
# this works:
associated_country = models.ForeignKey('geonames.Countryinfo', models.DO_NOTHING, db_column='published_country', blank=True, null=True)
# this doesn't:
associated_continent = models.ForeignKey('geonames.Continentcodes', on_delete=models.DO_NOTHING, db_column='published_continent' blank=True, null=True)
class Meta:
managed = True
db_table = 'product'
class Continentcodes(models.Model):
code = models.CharField(max_length=2, primary_key=True, unique=True)
name = models.TextField(blank=True, null=True)
geoname_id = models.ForeignKey('Geoname', models.DO_NOTHING, blank=True, null=True, unique=True)
class Meta:
managed = False
db_table = 'geoname_continentcodes'
class Countryinfo(models.Model):
iso_alpha2 = models.CharField(primary_key=True, max_length=2)
country = models.TextField(blank=True, null=True)
geoname = models.ForeignKey('Geoname', models.DO_NOTHING, blank=True, null=True)
neighbours = models.TextField(blank=True, null=True)
class Meta:
ordering = ['country']
managed = False
db_table = 'geoname_countryinfo'
verbose_name_plural = 'Countries'
When I go to edit an entry in the django admin page for 'Products' I see this:
InvalidCursorName at /admin/product/6/change/ cursor
"_django_curs_140162796078848_sync_5" does not exist
The above exception (column geoname_continentcodes.geoname_id_id does
not exist LINE 1: ...ntcodes"."code", "geoname_continentcodes"."name",
"geoname_c...
^ HINT: Perhaps you meant to reference the column
"geoname_continentcodes.geoname_id"
It looks like it's trying to reference geoname_continentcodes.geoname_id_id for some reason. I have tried adding to='code' in the ForeignKey relationship, but it doesn't seem to effect anything.
Additionally, the associated_country relationship seems to work just fine if I comment out the associated_continent field. The associated_continent is the column that is giving some problem.
Here is some more context about what the table looks like in the database:
Removing the '_id' as the suffix is the fix. In this case geoname_id changed to geoname fixes this. Why? I have no idea. Django is doing something behind the scenes that is not clear to me. Here is the updated model:
class Continentcodes(models.Model):
code = models.CharField(max_length=2, primary_key=True, unique=True)
name = models.TextField(blank=True, null=True)
# remove '_id' as the suffix here
geoname = models.ForeignKey('Geoname', models.DO_NOTHING, blank=True, null=True, unique=True)
class Meta:
managed = False
db_table = 'geoname_continentcodes'
Django adds _id to the end to differentiate between the object and the id column in the table, geoname_id will return the table id where as geoname will return the object.
I need to get view of table in admin.
I imported table from Mysql. In models.py code is written:
class Stations2(models.Model):
id_stations = models.IntegerField(db_column='ID_stations', primary_key=True) # Field name made lowercase.
name = models.TextField(db_column='Name', blank=True, null=True) # Field name made lowercase.
type = models.TextField(db_column='Type', blank=True, null=True) # Field name made lowercase.
country = models.TextField(db_column='Country', blank=True, null=True) # Field name made lowercase.
latitude = models.FloatField(db_column='Latitude', blank=True, null=True) # Field name made lowercase.
longitude = models.FloatField(db_column='Longitude', blank=True, null=True) # Field name made lowercase.
elevation = models.IntegerField(blank=True, null=True)
site_gaw_id = models.TextField(blank=True, null=True)
stations_id = models.IntegerField(blank=True, null=True)
class Meta:
managed = False
db_table = 'stations_2'
I wrote in admin.py:
from django.contrib import admin
from .models import Stations2
class data_admin(admin.ModelAdmin):
model = Stations2
list_display = ('Name', 'Type',)
admin.site.register(Stations2,data_admin)
and got an error:
ERRORS:
<class 'scrapping_2.admin.data_admin'>: (admin.E108) The value of 'list_display[0]' refers to 'Name', which is not a callable, an attribute of 'data_admin', or an attribute or method on 'scrapping_2.Stations2'.
<class 'scrapping_2.admin.data_admin'>: (admin.E108) The value of 'list_display[1]' refers to 'Type', which is not a callable, an attribute of 'data_admin', or an attribute or method on 'scrapping_2.Stations2'.
without data_admin code work well. How Should I solve my problem?
I am using django to make a webapp and I am trying to learn how to make queries.
I already connected my SQLServer database to django, and from the SQL Management studio added information for the 3 tables that I have. Then I ran python manage.py inspectdb, copied the results in my blog.models.pyand put python manage.py makemigrations and then migrate
However, when I open the python shell via python manage.py shell, import the models and make a `model.objects.all(), the result is the following:
<QuerySet [<Usuario: Usuario object (1)>, <Usuario: Usuario object (2)>]>
Django identifies that I have 2 objects created, but whenever I try to get specific information from one of them it shows the following:
>>> Usuario.objects.all()
<QuerySet [<Usuario: Usuario object (1)>, <Usuario: Usuario object (2)>]>
>>> user= Usuario.objects.all()
>>> user[0]
<Usuario: Usuario object (1)>
>>> user[0].ID_Usuario
Traceback (most recent call last):
File "<console>", line 1, in <module>
AttributeError: 'Usuario' object has no attribute 'ID_Usuario'
>>>
This is the information that I inserted via SQL Management studio
INSERT INTO Usuario(ID_Usuario,Nombre,Apellido,Edad,Email,Password,ID_Cargo,ID_Rol)
VALUES(1,'Pepe','Arana',36,'pepe#hotmail.com','pass',1,1),
(2,'Roquito','Velarde',40,'roquito#hotmail.com','pass',2,1)
Why isn't django recognizing the attributes but it is recognizing the fact that an object has been created?
Thanks
EDIT: This are the models in the blog.model.py file
class Cargo(models.Model):
id_cargo = models.IntegerField(db_column='ID_Cargo', primary_key=True) # Field name made lowercase.
nombre = models.CharField(db_column='Nombre', max_length=100, blank=True, null=True) # Field name made lowercase.
descripcion = models.CharField(db_column='Descripcion', max_length=100, blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'Cargo'
class Rol(models.Model):
id_rol = models.IntegerField(db_column='ID_Rol', primary_key=True) # Field name made lowercase.
nombre = models.CharField(db_column='Nombre', max_length=100, blank=True, null=True) # Field name made lowercase.
descripcion = models.CharField(db_column='Descripcion', max_length=100, blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'Rol'
class Usuario(models.Model):
id_usuario = models.IntegerField(db_column='ID_Usuario', primary_key=True) # Field name made lowercase.
nombre = models.CharField(db_column='Nombre', max_length=100, blank=True, null=True) # Field name made lowercase.
apellido = models.CharField(db_column='Apellido', max_length=100, blank=True, null=True) # Field name made lowercase.
edad = models.IntegerField(db_column='Edad', blank=True, null=True) # Field name made lowercase.
email = models.CharField(db_column='Email', max_length=100, blank=True, null=True) # Field name made lowercase.
password = models.CharField(db_column='Password', max_length=100, blank=True, null=True) # Field name made lowercase.
id_cargo = models.ForeignKey(Cargo, models.DO_NOTHING, db_column='ID_Cargo', blank=True, null=True) # Field name made lowercase.
id_rol = models.ForeignKey(Rol, models.DO_NOTHING, db_column='ID_Rol', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'Usuario'
user[0].ID_Usuario
You are getting an error because ID_Usario is not defined in the models. ID_Usario is an only a column name in the database.
But in the model, you have defined as id_usuario.
Replace this with
user[0].id_usuario
I have a App called "Properties" and I've created a DetailView that is working. Inside my Properties models I have a Property model and a Bedroom model with a ForeignKey to Property.
#views.py
class PropertyDetailView(DetailView):
template_name = 'properties/property-detail.html'
model = Property
def get_context_data(self, **kwargs):
contacts = ContactsOwner.objects.filter(owner__property=self.object)
context = super().get_context_data(**kwargs)
context['contact'] = contacts
return context
My models.py:
class Property(models.Model):
property_reference = models.CharField(db_column='Property_Reference', max_length=10) # Field name made lowercase.
address = models.CharField(db_column='Address', max_length=250, blank=True, null=True) # Field name made lowercase.
post_code = models.CharField(db_column='Post_Code', max_length=15, blank=True, null=True) # Field name made lowercase.
type = models.CharField(db_column='Type', max_length=25, blank=True, null=True, choices=HOUSE_TYPE_CHOICES) # Field name made lowercase.
bedrooms = models.IntegerField(db_column='Bedrooms', blank=True, null=True) # Field name made lowercase.
bathrooms = models.IntegerField(db_column='Bathrooms', blank=True, null=True) # Field name made lowercase.
usual_cleaning_requirements = models.CharField(db_column='Usual_Cleaning_Requirements', max_length=250, blank=True, null=True) # Field name made lowercase.
notes = models.CharField(db_column='Notes', max_length=500, blank=True, null=True) # Field name made lowercase.
feature_image = models.ImageField(null=True)
class Meta:
db_table = 'Property'
def __str__(self):
return self.property_reference
def get_absolute_url(self):
return reverse("properties:property_detail",kwargs={'pk':self.pk})
class Bedroom(models.Model):
type = models.CharField(db_column='Type', choices=BEDROOM_TYPE_CHOICES, max_length=50)
bed_dimensions = models.CharField(db_column='Bed_Dimension', choices=BED_DIMENSION_CHOICES, max_length=30)
image = models.ImageField(null=True, blank=True)
ensuite = models.BooleanField(default=False)
notes = models.CharField(db_column='Notes', max_length=500, blank=True, null=True) # Field name made lowercase.
property = models.ForeignKey(Property, null=False, on_delete=models.CASCADE, related_name='bedroom')
What I need is to create a button named "Add Bedroom" inside the template "property-detail.html" that sends me to a form with pre filled Foreign Key. Could you please help me on this?
You need to redirect that button submit to a view that gets the required info you want and then redirect that to another template with context the info you received (your Foreign key per se)
I need to update existing recode in the database.I'm using mysql.
this my model class
class SuSurey(models.Model):
#id = models.IntegerField(db_column='ID', primary_key=True) # Field name made lowercase.
su_name = models.CharField(db_column='su_Name', max_length=30) # Field name made lowercase.
description = models.CharField(db_column='Description', max_length=500, blank=True) # Field name made lowercase.
duration = models.IntegerField(db_column='Duration') # Field name made lowercase.
audience = models.CharField(db_column='Audience', max_length=20, blank=True) # Field name made lowercase.
start_date = models.CharField(db_column='Start_date', max_length=50, blank=True) # Field name made lowercase.
end_date = models.CharField(db_column='End_date', max_length=50, blank=True) # Field name made lowercase.
create_date = models.CharField(db_column='Create_date', max_length=50, blank=True) # Field name made lowercase.
update_date = models.CharField(db_column='Update_date', max_length=50, blank=True) # Field name made lowercase.
create_by = models.IntegerField(db_column='Create_by', blank=True, null=True) # Field name made lowercase.
update_by = models.IntegerField(db_column='Update_by', blank=True, null=True) # Field name made lowercase.
def __unicode__(self):
return self.su_name
class Meta:
managed = False
db_table = 'su_surey'
i didn't use any forms in my web application. In my view.py i have this
if request.method == 'POST':
date=request.POST.get('dates','').split('-')
survey_data=SuSurey.objects.get(id=survey_id)
survey_data.su_name=request.POST.get('Name','')
survey_data.description=request.POST.get('Description','')
survey_data.duration=request.POST.get('Duration','')
survey_data.audience=request.POST.get('Audience','')
survey_data.start_date=date[0]
survey_data.end_date=date[1]
survey_data.update_date=datetime.datetime.today()
survey_data.update_by=request.session['user_login_data']['id']
try:
survey_data.full_clean()
survey_data.save(update_fields=['su_name','description','duration','audience','start_date','end_date','update_date','update_by'])
messages={'success':'Successfuly data added'}
url = reverse('addQuestionSurveys', kwargs={'survey_id': survey_id })
return HttpResponseRedirect(url)
except ValidationError as e:
messages={'error':e.messages}
return render(request, 'pages/forms/newSurvey.html',{'dept_data': dept_data,'messages': messages},context_instance=RequestContext(request))
when i add data Django did update the recode that is find by survey_id recode. it will add new recode to database.how can i fix this problem ? need a quick help thank you.