Based on model multiselectfield show result in template django

Blackranger 0
Viewed 157

based on multiple choice field i want to show result in template but I have no idea how to do as you can see in this model i give lunch choice to students base on lunch choice i want to show result but it is not working for ex if he select sandwich the result after submit will you sandwich will be ready and same for others

from multiselectfield import MultiSelectField
class student(models.Model):
    lunch_choice = [ 
        ('Sandwich', 'Sandwich'),
        ('Salad', 'Salad'),
        ('omlete', 'omlete'),
    ]
    name = models.CharField(max_length=70, blank=False)
    classs =  models.CharField(max_length70, blank=True)
    lunch =  MultiSelectField(choices=lunch_choice, blank=True)

    def __str__(self):
        return self.name

i tried in my HTML and it didn't work

{% if student.classs %}
{% if student.lunch == 'Sandwich' %}
          <p> your sandwich will be ready</p>
{% endif %} 
{%endif%}

and in form.py using widget

widgets = {
    'lunch':forms.CheckboxSelectMultiple(attrs={'id':'lunch'}),
}

my views.py

def preview(request):
    student = student.objects.all()
    return render(request, 'preview.html',{'student':student})
modelform multi-select django-templates django-models django
3 Answers

OP can create a model for lunches (it would enable to create new lunches, edit and delete). Then, in the Student model create a lunch with a ManyToManyField, like

lunch = models.ManyToManyField(Lunch, blank=True)

Note the usage of blank=True to not require the field in the forms.

Then, when one generates a form based on that model, it'll create an experience just like the one in Django Admin where one can select multiple ones.

One can then show it to the user in a template.

If one doesn't like the experience of the form and want to make it more user friendly, there are some articles out there explaining that

Gonçalo Peres0

acc to me there is no such way by which u can show the result base on selected option because i also tried to use that and look for answers on internet but didn't find anything and creator of that repo is also not responding although I would recommend you to use models many to many field It will allow user to select more than one option like multiselectfield like this

first, create models

class Lunch(models.Model):
    title = models.CharField(max_length=200)

    def __str__(self):
        return self.title

then add this in student models

lunch =  models.ManyToManyField(Lunch, blank=True, related_name="lunch")

then add your option in lunch model

and it in your template to show result base on selected option

{% if student.classs %}
{% for Lunch in student.lunch.all %}
{% if Lunch.title == 'Sandwich' %}
          <p> your sandwich will be ready</p>
{% endif %}
{% endfor %} 
{%endif%}

it will work

Shreyash Mishra0

This happens because the string is being compared to type: type(aaa[0].lunch) <class 'multiselectfield.db.fields.MSFList'>. Printed the data type 'type(aaa[0].lunch)' of the first value from the database in the view. Used stringformat:'s' to convert data to string in template. Here you can read about the conversion: conversion

transformation type:

replace 'samplesite' with the name of your application.

urls.py

urlpatterns = [
   path("Test/", Test, name = 'Test'),
]

views.py

def Test(request):
    aaa = student.objects.all()
    print('type(aaa[0].lunch)', type(aaa[0].lunch))
    context = {'fff': aaa}

    return render(request, 'samplesite/lunch.html', context)

lunch.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
</head>
<body>
    {% for aa in fff %}
    {% if  aa.lunch|stringformat:'s' == 'Sandwich' %}
    <p>{{aa.lunch}}</p>
    <p>{{aa.name}}</p>
    {% endif %}
    {% endfor %}
</body>
</html>

settings in settings.py:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }

django version 4.1 enter image description here

useruThO0
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