how to make a form field exact? - django

Question

In django how to make form field exact, i.e it will have choices?
My forms.py:
from django import forms
class FilterForm(forms.Form):
category = forms.CharField()
price = forms.IntegerField()
My models.py:
CATEGORY_CHOICES = (
('Fruits and Vegetables', 'Fruits and Vegetables'),
('Electronics', 'Electronics'),
('Clothing', 'Clothing'),
('Books', 'Books'),
)
class Item(models.Model):
title = models.CharField(max_length=120)
price = models.FloatField()
discount_price = models.FloatField(blank=True, null=True)
category = models.CharField(choices=CATEGORY_CHOICES, max_length=120, null=True, blank=True)
image_url = models.CharField(max_length=2083, null=True, blank=True)
slug = models.SlugField(null=True, blank=True)
description = models.TextField(null=True, blank=True)

Answer 1

Please make use of a ModelForm [Django-doc]. A ModelForm is capable of automating a lot of aspects when creating or update model records. Furthermore it can automatically construct the fields based on the fields of the model. You can, if you want to, alter the widgets, etc. But usually a ModeLField is a good starting point.
Here you thus can construct a form like:
# app/forms.py
from django import forms
from app.models import Item
class FilterForm(forms.ModelForm):
class Meta:
model = Item
fields = ['category', 'price']
Where you replace app with the name of the app.

Answer 2

You can use ModelForm
from django import forms
from .models import Item
class FilterForm(forms.ModelForm):
class Meta:
model = Item
fields = [
'category',
'price'
]
If you wanna stick with Form, use Choice Field and copy the Choices in form
from django import forms
class FilterForm(forms.Form):
CATEGORY_CHOICES = (
('Fruits and Vegetables', 'Fruits and Vegetables'),
('Electronics', 'Electronics'),
('Clothing', 'Clothing'),
('Books', 'Books'),
)
category = forms.ChoiceField(choices=CATEGORY_CHOICES)
price = forms.IntegerField()