Say I have this simple form:
class ContactForm(forms.Form):
first_name = forms.CharField(required=True)
last_name = forms.CharField(required=True)
And I have a default value for one field but not the other. So I set it up like this:
default_data = {'first_name','greg'}
form1=ContactForm(default_data)
However now when I go to display it, Django shows a validation error saying last_name is required:
print form1.as_table()
What is the correct way to do this? Since this isn't data the user has submitted, just data I want to prefill.
Note: required=False will not work because I do want it required when the user submits the data. Just when I'm first showing the form on the page, I won't have a default value.
You can override forms for django's built-in admin by setting form attribute of ModelAdmin to your own form class. See: https://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.form.
The is_valid() method is used to perform validation for each field of the form, it is defined in Django Form class. It returns True if data is valid and place all data into a cleaned_data attribute.
The clean() method on a Field subclass is responsible for running to_python() , validate() , and run_validators() in the correct order and propagating their errors. If, at any time, any of the methods raise ValidationError , the validation stops and that error is raised.
If yes try to disable this behavior, set the novalidate attribute on the form tag As <form action="{% url 'new_page' %}", method="POST" novalidate> in your html file.
Form constructor has initial
param that allows to provide default values for fields.
From the django docs is this:
from django import forms
class ContactForm(forms.Form):
subject = forms.CharField(max_length=100)
message = forms.CharField()
sender = forms.EmailField()
cc_myself = forms.BooleanField(required=False)
The "required=False" should produce the effect you're after.
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