Sourced from fastapi's releases.

0.114.0

You can restrict form fields to only include those declared in a Pydantic model and forbid any extra field sent in the request using Pydantic's model_config = {"extra": "forbid"}:

from typing import Annotated
from fastapi import FastAPI, Form
from pydantic import BaseModel
app = FastAPI()
class FormData(BaseModel):
username: str
password: str
model_config = {"extra": "forbid"}
@​app.post("/login/")
async def login(data: Annotated[FormData, Form()]):
return data

Read the new docs: Form Models - Forbid Extra Form Fields.

Features

• ✨ Add support for forbidding extra form fields with Pydantic models. PR #12134 by @​tiangolo.

Docs

• 📝 Update docs, Form Models section title, to match config name. PR #12152 by @​tiangolo.

Internal

• ✅ Update internal tests for latest Pydantic, including CI tweaks to install the latest Pydantic. PR #12147 by @​tiangolo.

0.113.0

Now you can declare form fields with Pydantic models:

from typing import Annotated
from fastapi import FastAPI, Form
from pydantic import BaseModel
app = FastAPI()
class FormData(BaseModel):
</tr></table>

... (truncated)

• bde12fa 🔖 Release version 0.114.0
• 74842f0 📝 Update release notes
• e68d8c6 📝 Update release notes
• 4ff22a0 📝 Update docs, Form Models section title, to match config name (#12152)
• a11e392 📝 Update release notes
• 4633b1b ✨ Add support for forbidding extra form fields with Pydantic models (#12134)
• 1b06b53 📝 Update release notes
• c411b81 ✅ Update internal tests for latest Pydantic, including CI tweaks to install t...
• d86f660 🔖 Release version 0.113.0
• 179f838 📝 Update release notes
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