fastapi-view-mixins 0.0.4

Fastapi view mixins

Package of mixins that helps build API.

List of available mixins:

1. BaseAPIListMixin
2. BaseAPIDetailMixin
3. BaseAPIUpdateMixin
4. BaseAPICreateMixin
5. BaseAPIDestroyMixin

List of available pagination's:

1. LimitOffsetPagination - default
2. CursorPagination

Built on:

1. fastapi==0.79.0
2. pytest==7.1.2
3. pytest-asyncio==0.19.0
4. SQLAlchemy==1.4.39
5. aiosqlite==0.17.0 # testing purpose

Base usage:

List view:

# views.py
from fastapi_views.views.mixins import BaseAPIListMixin


class FooListView(BaseAPIListMixin):
    model = Foo


# urls.py
from fastapi import (APIRouter, Depends)
from fastapi_views import utils

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/all', response_model=list[SomePydanticModel])
async def get_articles(
        session: Session = Depends(db_session),
):
    return utils.scalars(FooApiListView().get_all(session=session))

You can also override mixin attrs to do it a bit shorter

# urls.py
from fastapi import (APIRouter, Depends)
from fastapi_views import utils
from fastapi_views.views.mixins import BaseAPIListMixin

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/all', response_model=list[SomePydanticModel])
async def get_articles(
        session: Session = Depends(db_session),
):
    return utils.scalars(BaseAPIListMixin(attrs={'model': Foo}).get_all(session=session))

List view using pagination:

# views.py
from fastapi_views.views.mixins import BaseAPIListMixin


class FooListView(BaseAPIListMixin):
    model = Foo
    paginate_by = 15


# urls.py
from fastapi import (APIRouter, Depends)
from fastapi_views import utils
from fastapi_views.pagination.annotations import PaginationParams
from fastapi_views.pagination.schema import LimitOffsetPage

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/all', response_model=LimitOffsetPage.include(SomePydanticModel))
async def get_articles(
        params: PaginationParams = Depends(),  # put inside fun to return Session and Request
):
    return utils.scalars(FooApiListView().get_all_with_pagination(**params))  # session=, request=

List view cursor pagination example:

# views.py
from fastapi_views.views.mixins import BaseAPIListMixin
from fastapi_views.pagination.core import PaginationCursor
from sqlalchemy import select, and_
from sqlalchemy.orm import joinedload, Load
from sqlalchemy.sql import Select


class FooListView(BaseAPIListMixin):
    model = Foo
    paginate_by = 10
    pagination_strategy = PaginationCursor

    def get_statement(self) -> Select:
        """As default returns select(self.model)."""

        statement = select(self.model).options(
            Load(self.model).load_only(self.model.title, self.model.published),
        ).options(
            joinedload(self.model.fk_related, innerjoin=True).
            load_only(Fk_related.username, Fk_related.email)
        ).where(and_(self.model.id > 0, self.model.id < 100))

        return statement

    def get_pagination_kwargs(self):
        """
        As default returns {
            'model': self.model,
            'ordering': ['id'],
            'cursor_prefixes': ['next__', 'prev__']
        }
        """
        kw = super().get_pagination_kwargs()
        kw['ordering'] = ['-created']
        return kw


# urls.py
from fastapi import (APIRouter, Depends)
from fastapi_views import utils
from fastapi_views.pagination.annotations import PaginationParams
from fastapi_views.pagination.schema import CursorPage

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/all', response_model=CursorPage.include(SomePydanticModel))
async def get_articles(
        params: PaginationParams = Depends(),  # put inside fun to return Session and Request
):
    return utils.scalars(FooApiListView().get_all_with_pagination(**params))  # session=, request=

Detail/Update/Delete view:

Default field_name for detail/update/delete view is set to id. To override do as below

# views.py
class FooDetailUpdateDeleteView:
    ...
    pk_field = 'field_name'

Detail view:

# views.py
from fastapi_views.views.mixins import BaseAPIDetailMixin


class FooDetailView(BaseAPIDetailMixin):
    model = Foo


# urls.py
from fastapi import (APIRouter, Depends)

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/{pk}')
async def get_foo(pk: int, session: Session = Depends(db_session)):
    return FooDetailView().get_detail(field_value=pk, session=session)

Update view:

# views.py
from fastapi_views.views.mixins import BaseAPIUpdateMixin


class FooUpdateView(BaseAPIUpdateMixin):
    model = Foo


# urls.py
from fastapi import (APIRouter, Depends)

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/{pk}')
async def get_foo(pk: int, session: Session = Depends(db_session)):
    return FooUpdateView().update_single(field_value=pk, session=session, data={})

Delete view:

# views.py
from fastapi_views.views.mixins import BaseAPIDestroyMixin


class FooDeleteView(BaseAPIDestroyMixin):
    model = Foo


# urls.py
from fastapi import (APIRouter, Depends)

foo_router = APIRouter(
    prefix='/foo',
    tags=['Foo']
)


@foo_router.get('/{slug}')
async def get_foo(slug: str, session: Session = Depends(db_session)):
    return FooDeleteView().delete(session=session, field_value=slug)

To run tests install requirements and run pytest command

Download on https://pypi.org/project/fastapi-view-mixins/