TypeError: get_body_field() got an unexpected keyword argument 'dependant' (FastAPI >=0.112.4)

[espdev]

Hello!

I just update FastAPI version from 0.112.2 to 0.112.4 and fastapi-pagination is broken.

Traceback (most recent call last):
...
  File ".../python3.11/site-packages/fastapi_pagination/api.py", line 390, in add_pagination
    _add_pagination(parent)
  File ".../python3.11/site-packages/fastapi_pagination/api.py", line 380, in _add_pagination
    _update_route(route)
  File ".../python3.11/site-packages/fastapi_pagination/api.py", line 364, in _update_route
    route.body_field = get_body_field(dependant=route.dependant, name=route.unique_id)
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: get_body_field() got an unexpected keyword argument 'dependant'

I don't know what happened, but it certainly doesn't follow the semver rules. Either FastAPI broke the public API in the patch version, or fastapi-pagination uses a private API.

[espdev]

Sorry, it seems this is a duplicate of: #1272

[espdev]

There is the PR that changes keyword-only argument from dependant to flat_dependant in fastapi.dependencies.utils.get_body_field public function:
fastapi/fastapi#12117

And these changes made it into the patch release 0.112.4. This broke semver convention, leading to this issue.

[m4rcelofs]

I don't know what happened, but it certainly doesn't follow the semver rules. Either FastAPI broke the public API in the patch version, or fastapi-pagination uses a private API.

At the risk of sounding pedantic - FastAPI is at 0.y.z, which semver considers "initial development", as in - no stable API yet and things may break at any time

[espdev]

@m4rcelofs we use the following dependency specification for FastAPI:

fastapi = '^0.112.0'

This means that the poetry update function will not update y version for 0.y.z dependency, only z will be updated.
So we expect that bumping PATCH version (z) will not break backwards compatibility for 0.y.z dependencies anyway.

[uriyyo]

Hi all,

New version 0.12.27 has been released, this issue should be fixed now