[Django]-Django required field in model form

If the model field has blank=True, then required is set to False on the form field. Otherwise, required=True

Says so here: http://docs.djangoproject.com/en/dev/topics/forms/modelforms/

Looks like you are doing everything right.
You could check the value of self.fields['end'].required.

Expanding on DataGreed’s answer, I created a Mixin that allows you to specify a fields_required variable on the Meta class like this:

class MyForm(RequiredFieldsMixin, ModelForm):

    class Meta:
        model = MyModel
        fields = ['field1', 'field2']
        fields_required = ['field1']

Here it is:

class RequiredFieldsMixin():

    def __init__(self, *args, **kwargs):

        super().__init__(*args, **kwargs)

        fields_required = getattr(self.Meta, 'fields_required', None)

        if fields_required:
            for key in self.fields:
                if key not in fields_required:
                    self.fields[key].required = False

It’s not an answer, but for anyone else who finds this via Google, one more bit of data: this is happening to me on a Model Form with a DateField. It has required set to False, the model has “null=True, blank=True” and the field in the form shows required=False if I look at it during the clean() method, but it’s still saying I need a valid date format. I’m not using any special widget and I get the “Enter a valid date” message even when I explicitly set input_formats=[‘%Y-%m-%d’, ‘%m/%d/%Y’, ‘%m/%d/%y’, ”] on the form field.

EDIT: Don’t know if it’ll help anyone else, but I solved the problem I was having. Our form has some default text in the field (in this case, the word “to” to indicate the field is the end date; the field is called “end_time”). I was specifically looking for the word “to” in the form’s clean() method (I’d also tried the clean_end_time() method, but it never got called) and setting the value of the clean_data variable to None as suggested in this Django ticket. However, none of that mattered as (I guess) the model’s validation had already puked on the invalid date format of “to” without giving me a chance to intercept it.

This is a bug when using the widgets:

workaround:
Using Django time/date widgets in custom form

or ticket 12303

From the model field documentation,

If you have a model as shown below,

class Article(models.Model):
    headline = models.CharField(
        max_length=200,
        null=True,
        blank=True,
        help_text='Use puns liberally',
    )
    content = models.TextField()

You can change the headline’s form validation to required=True instead of blank=False as that of the model as defining the field as shown below.

class ArticleForm(ModelForm):
    headline = MyFormField(
        max_length=200,
        required=False,
        help_text='Use puns liberally',
    )

    class Meta:
        model = Article
        fields = ['headline', 'content']

So answering the question,

class CircuitForm(ModelForm):
    begin = forms.DateTimeField(required=False)
    end = forms.DateTimeField(required=False)
        class Meta:
            model = Circuit
            exclude = ('lastPaged',)

this makes begin and end to required=False