Fodantic

Pydantic-based HTTP forms.

Pydantic is the most widely used data validation library for Python, but it's hard to use it with regular HTTP forms... until now.

Fodantic allow you to quickly wrap your Pydantic models and use them as forms: with support for multiple values, checkboxes, error handling, and integration with your favorite ORM.

A simple example

from fodantic import formable
from pydantic import BaseModel

@formable
class UserModel(BaseModel):
    name: str
    friends: list[int]
    active: bool = True

request_data = Multidict(('name', 'John Doe'), ('friends', '2'), ('friends', '3')}

# The magic
form = UserModel.as_form(request_data, object=None)

print(form)
#> UserModel.as_form(name='John Doe', friends=[2, 3], active=False)
print(form.fields["name"].value)
#> John Doe
print(form.fields["name"].error)
#> None
print(form.save())  # Can also update the `object` passed as an argument
#> {'name': 'John Doe', 'friends': [2, 3], 'active': False}

Installation

pip install fodantic

Requirements

• Python 3.10+
• Pydantic 2.*