Django modelform NOT required field

Question

I have a form like this:

class My_Form(ModelForm):
    class Meta:
        model = My_Class
        fields = (\'first_name\', \'last_name\' , \'address\')


        

Answer 1

The above answers are correct; nevertheless due note that setting null=True on a ManyToManyField has no effect at the database level and will raise the following warning when migrating:

(fields.W340) null has no effect on ManyToManyField.

A good answer to this is explained in this other thread.

Answer 2

Solution: use both blank=True, null=True.

my_field = models.PositiveIntegerField(blank=True, null=True)

Explanation:

if you use null=True

`my_field = models.PositiveIntegerField(null=True)`

then my_field is required, with * against it in form, you cant submit empty value.

if you use blank=True

`my_field = models.PositiveIntegerField(blank=True)`

then my_field is not required, no * against it in form, you cant submit value. But will get null field not allowed.

Note:

1) marking as not required and 
2) allowing null field are two different things.

Pro Tip:

Read the error more carefully than documentation.

Answer 3

field = models.CharField(max_length=9, default='', blank=True)

Just add blank=True in your model field and it won't be required when you're using modelforms.

source: https://docs.djangoproject.com/en/3.1/topics/forms/modelforms/#field-types

Answer 4

Guess your model is like this:

class My_Class(models.Model):

    address = models.CharField()

Your form for Django version < 1.8:

class My_Form(ModelForm):

    address = forms.CharField(required=False)

    class Meta:
        model = My_Class
        fields = ('first_name', 'last_name' , 'address')

Your form for Django version > 1.8:

class My_Form(ModelForm):

    address = forms.CharField(blank=True)

    class Meta:
        model = My_Class
        fields = ('first_name', 'last_name' , 'address')

Answer 5

class My_Form(forms.ModelForm):
    class Meta:
        model = My_Class
        fields = ('first_name', 'last_name' , 'address')

    def __init__(self, *args, **kwargs):
        super(My_Form, self).__init__(*args, **kwargs)
        self.fields['address'].required = False

Answer 6

You would have to add:

address = forms.CharField(required=False)