Develop Reference

User input in HTML form not captured in Python correctly

i have this html form where user can choose name from a list :
{% block main %}
<form action="/ballot" method="post">
1st Choice
<select name="name1">
<option disabled selected value="">name</option>
{% for candidate in candidates %}
<option value={{ candidate }}>{{ candidate["name"] }}</option>
{% endfor %}
</select><div></div>
In python, i request for this data "name1" using this code
name1= request.form['name1']
return "Username is " + name1
And the result is below :
Username is {'id':
Note that "{'id':" is nowhere in my code
How do i get the correct value from html form

On your for loop value must be between ":
Try editing from this
<option value={{ candidate }}>{{ candidate["name"] }}</option>
To this:
<option value="{{ candidate }}">{{ candidate["name"] }}</option>

How to get the selected value from html select with django

I would like to know if it's possible to get the selected value from a select HTML without using a submit input? Because when I hit the submit, the value selected is returned but it reloads the web page and the select goes back to it's intial state.
Here is my code to visualize better:
views.py
def index(request):
id_desi = request.POST.get('drop_desi')
return render(request, 'index.html', {'designation_liste': df.designation_liste})
index.html
<form action="{% url 'DataMat-index' %}" method="POST">{% csrf_token %}
<select name="drop_desi">
<option disabled selected value> -- select value -- </option>
{% for i in designation_liste %}
<option value="{{ i }}">{{ i }}</option>
{% endfor %}
</select>
<input type="submit" value="valider">
</form>

get values from html select in views with django

I would like to get the value and even the string if possible of the selected value in my HTML file.
index.html
<form action="#" method="post">
<select id="drop1">
<option disabled selected value> -- select value -- </option>
{% for i in df %}
<option value="{{ i }}">{{ i }}</option>
{% endfor %}
</select>
</form>
views.py
def index(request):
if request.method == 'POST':
selected_value = request.POST.get('drop1')
print(selected_value)
else:
return render(request, 'index.html', {'df': df.designation_list})
With this, nothing is returned. I saw that I have to use <form></form> to get an html value but I can't find what to put in the action= field.
Can you see what is missing in my code?
Thanks in advance

The action attribute specifies where to send the form-data when a form is submitted.
In your case, you have to add the url of the view that will hand that data. For example:
<form action="{% url 'index' %}" method="post">
<select id="drop1">
<option disabled selected value> -- select value -- </option>
{% for i in df %}
<option value="{{ i }}">{{ i }}</option>
{% endfor %}
</select>
</form>
Note: Change the index with the name you specified in your URL pattern.

Problem with 'Cannot assign' error in django

I have something like this in my template.
<form action="" method="POST">
{% csrf_token %}
<select name='section'>
{% for item in all_sections %}
<option>{{ item.SectionName }}</option>
{% endfor %}
</select>
</form>
and in my view.py page:
obj=models.Section.objects.all()
context={
'all_sections':obj,
}
return render(request,'matab/add-service.html',context)
but i get this is error while saving data:
Cannot assign "'{item}'": "Services.Section" must be a "Section" instance.
also my models.py is like this:
class Section(models.Model):
SectionName=models.CharField(max_length=50)
SectionId=models.CharField(max_length=10)
class Services(models.Model):
Section=models.OneToOneField(
Section,
on_delete=models.CASCADE,
)
how can i solve it?

Services.Section is a OneToOneField, so you need to assign Section instance, not its name.
Depending on your code, it might work if you set the option value to the pk.
<select name='section'>
{% for item in all_sections %}
<option value="{{ item.pk }}">{{ item.SectionName }}</option>
{% endfor %}
</select>
As Iain suggests in the comments, it would be better to change your views to use Django forms instead of manually render select inputs.

Can't get form data in view function: Django

I need to submit a string to a view function via a dropdown menu and submit button.
in my template I have:
<form action="{% url 'exec_task' %}" method="post">
{% csrf_token %}
<select id="select_task" form="select_task" name="select_task">
{% for task in available_tasks %}
<option id="selected_task" value="{{ task }}">{{ task }}</option>
{% endfor %}
</select>
<input class="button" type="submit" value="Run Selected Task">
</form>
in my view function I have:
def exec_task(request):
if request.method == 'POST':
task = request.POST.get('select_task')
print(task)
getattr(tasks, task)(0)
return redirect('management')
The print(task) always comes out as None, which generates an error when I try to call it via getattr in the next line.
I've read through all the questions and tutorials I can find on this and I don't know what I'm doing wrong, but when I print the request.POST object, all I get is the csrf token. The QueryDict has nothing else in it.
Any ideas?

As discussed in comments please remove
form="select_task" from select tag.
So final select tag / html would be.
<form action="{% url 'exec_task' %}" method="post">
{% csrf_token %}
<select id="select_task" name="select_task">
{% for task in available_tasks %}
<option id="selected_task" value="{{ task }}">{{ task }}</option>
{% endfor %}
</select>
<input class="button" type="submit" value="Run Selected Task">
</form>