Can't use FormField due to required request in __init__

[nickleman]

StarletteForm classes can't be used in FormField. This is becuase the initializer requires a Request operator. The request should be optional in the initializer and maybe pasted in with the validate_on_submit. Possible there needs to be a StarletteFormField class that passes its request object to the form passed in to it? But I think the best route would be to have an init that doesn't require positional arguments just like WTForms' Form class and then just use a load_form_data(request) member function to populate data. To be backwards compatible, probably keeping the request object as optional in the init function would be smart.

[amorey]

Thanks for creating an issue. Can you write an example code block that shows the problem you're describing?

[nickleman]

class AddressForm(StarletteForm):
    street_addr = TextField(
        "Street Address",
        validators=[],
    )
    city = TextField(
        "City",
        validators=[],
    )
    state = TextField("State", validators=[Length(min=2, max=2)])
    zipcode = TextField("Zipcode", validators=[Length(min=5, max=5)])

class CreateSchoolForm(StarletteForm):
    name = TextField(
        "School Name",
        validators=[DataRequired("Please provide a school name")],
    )
    address = FormField(AddressForm)

Do you need the full working code? I'm extracting this out of something I'm writing.

[amorey]

Thanks! That helps.

I have to think some more about the consequences of allowing StarletteForm to be initialized without the request object (e.g. on CSRF protection) but in the mean time you should be able to use the WTF Form class for your inner forms:

from starlette_wtf import StarletteForm
from wtforms import Form, TextField, FormField

class AddressForm(Form):
    street_addr = TextField(
        "Street Address",
        validators=[],
    )
    city = TextField(
        "City",
        validators=[],
    )
    state = TextField("State", validators=[Length(min=2, max=2)])
    zipcode = TextField("Zipcode", validators=[Length(min=5, max=5)])

class CreateSchoolForm(StarletteForm):
    name = TextField(
        "School Name",
        validators=[DataRequired("Please provide a school name")],
    )
    address = FormField(AddressForm)