Flask Framework Cookbook - Second Edition

How to do it...

In our catalog application, we can have two forms, one each for the Product and Category models. These forms will have a common field called Name. We can create a common form for this field, and then the separate forms for the Product and Category models can use this form, instead of having a Name field in each of them.

This can be implemented as follows in models.py:

class NameForm(FlaskForm): 
    name = StringField('Name', validators=[InputRequired()]) 
 class ProductForm(NameForm): 
    price = DecimalField('Price', validators=[ 
        InputRequired(), NumberRange(min=Decimal('0.0')) 
    ]) 
    category = SelectField( 
        'Category', validators=[InputRequired()], coerce=int 
    ) 
 
 
class CategoryForm(NameForm): 
    pass 

We created a common form called NameForm ...