CRUD Router API Reference¶
crud_router
is a utility function for creating and configuring a FastAPI router with CRUD endpoints for a given model.
Function Definition¶
Creates and configures a FastAPI router with CRUD endpoints for a given model.
This utility function streamlines the process of setting up a router for CRUD operations,
using a custom EndpointCreator
if provided, and managing dependency injections as well
as selective method inclusions or exclusions.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
session |
Callable
|
The SQLAlchemy async session. |
required |
model |
ModelType
|
The SQLAlchemy model. |
required |
create_schema |
Type[CreateSchemaType]
|
Pydantic schema for creating an item. |
required |
update_schema |
Type[UpdateSchemaType]
|
Pydantic schema for updating an item. |
required |
crud |
Optional[FastCRUD]
|
An optional |
None
|
delete_schema |
Optional[Type[DeleteSchemaType]]
|
Optional Pydantic schema for deleting an item. |
None
|
path |
str
|
Base path for the CRUD endpoints. |
''
|
tags |
Optional[list[Union[str, Enum]]]
|
Optional list of tags for grouping endpoints in the documentation. |
None
|
include_in_schema |
bool
|
Whether to include the created endpoints in the OpenAPI schema. |
True
|
create_deps |
Sequence[Callable]
|
Optional list of functions to be injected as dependencies for the create endpoint. |
[]
|
read_deps |
Sequence[Callable]
|
Optional list of functions to be injected as dependencies for the read endpoint. |
[]
|
read_multi_deps |
Sequence[Callable]
|
Optional list of functions to be injected as dependencies for the read multiple items endpoint. |
[]
|
update_deps |
Sequence[Callable]
|
Optional list of functions to be injected as dependencies for the update endpoint. |
[]
|
delete_deps |
Sequence[Callable]
|
Optional list of functions to be injected as dependencies for the delete endpoint. |
[]
|
db_delete_deps |
Sequence[Callable]
|
Optional list of functions to be injected as dependencies for the hard delete endpoint. |
[]
|
included_methods |
Optional[list[str]]
|
Optional list of CRUD methods to include. If |
None
|
deleted_methods |
Optional[list[str]]
|
Optional list of CRUD methods to exclude. |
None
|
endpoint_creator |
Optional[Type[EndpointCreator]]
|
Optional custom class derived from |
None
|
is_deleted_column |
str
|
Optional column name to use for indicating a soft delete. Defaults to |
'is_deleted'
|
deleted_at_column |
str
|
Optional column name to use for storing the timestamp of a soft delete. Defaults to |
'deleted_at'
|
updated_at_column |
str
|
Optional column name to use for storing the timestamp of an update. Defaults to |
'updated_at'
|
endpoint_names |
Optional[dict[str, str]]
|
Optional dictionary to customize endpoint names for CRUD operations. Keys are operation types
( |
None
|
filter_config |
Optional[Union[FilterConfig, dict]]
|
Optional |
None
|
Returns:
Type | Description |
---|---|
APIRouter
|
Configured |
Raises:
Type | Description |
---|---|
ValueError
|
If both |
Examples:
Models and Schemas Used Below
mymodel/model.py
mymodel/schemas.py
customer/model.py
customer/schemas.py
product/model.py
product/schemas.py
from pydantic import BaseModel
class CreateProductSchema(BaseModel):
name: str | None = None
price: float | None = None
class ReadProductSchema(BaseModel):
id: int
name: str | None = None
price: float | None = None
class UpdateProductSchema(BaseModel):
name: str | None = None
price: float | None = None
class DeleteProductSchema(BaseModel):
pass
order/model.py
from sqlalchemy import Column, ForeignKey, Integer
from sqlalchemy.orm import DeclarativeBase
class Base(DeclarativeBase):
pass
class Order(Base):
__tablename__ = "order"
id = Column(Integer, primary_key=True)
customer_id = Column(Integer, ForeignKey("customer.id"))
product_id = Column(Integer, ForeignKey("product.id"))
quantity = Column(Integer)
order/schemas.py
from pydantic import BaseModel
class CreateOrderSchema(BaseModel):
customer_id: int | None = None
product_id: int | None = None
quantity: int | None = None
class ReadOrderSchema(BaseModel):
id: int
customer_id: int | None = None
product_id: int | None = None
quantity: int | None = None
class UpdateOrderSchema(BaseModel):
customer_id: int | None = None
product_id: int | None = None
quantity: int | None = None
class DeleteOrderSchema(BaseModel):
pass
tier/model.py
tier/schemas.py
department/model.py
department/schemas.py
user/model.py
from sqlalchemy import (
Boolean,
Column,
DateTime,
ForeignKey,
Integer,
String,
func,
)
from sqlalchemy.orm import DeclarativeBase
class Base(DeclarativeBase):
pass
class User(Base):
__tablename__ = "user"
id = Column(Integer, primary_key=True)
name = Column(String)
username = Column(String)
email = Column(String)
age = Column(Integer)
role = Column(String)
tier_id = Column(Integer, ForeignKey("tier.id"))
department_id = Column(Integer, ForeignKey("department.id"))
manager_id = Column(Integer, ForeignKey("user.id"))
is_active = Column(Boolean, default=True)
is_superuser = Column(Boolean, default=False)
registration_date = Column(DateTime, default=func.now())
archived = Column(Boolean, default=False)
archived_at = Column(DateTime)
user/schemas.py
import datetime
from pydantic import BaseModel
class CreateUserSchema(BaseModel):
name: str | None = None
username: str | None = None
email: str | None = None
age: int | None = None
role: str | None = None
tier_id: int | None = None
department_id: int | None = None
manager_id: int | None = None
is_active: bool | None = None
is_superuser: bool | None = None
class ReadUserSchema(BaseModel):
id: int
name: str | None = None
username: str | None = None
email: str | None = None
age: int | None = None
role: str | None = None
tier_id: int | None = None
department_id: int | None = None
manager_id: int | None = None
is_active: bool
is_superuser: bool
registration_date: datetime.datetime
archived: bool
archived_at: datetime.datetime | None = None
class UpdateUserSchema(BaseModel):
name: str | None = None
username: str | None = None
email: str | None = None
age: int | None = None
role: str | None = None
tier_id: int | None = None
department_id: int | None = None
manager_id: int | None = None
is_active: bool | None = None
is_superuser: bool | None = None
class DeleteUserSchema(BaseModel):
pass
story/model.py
story/schemas.py
task/model.py
from sqlalchemy import Column, ForeignKey, Integer, String
from sqlalchemy.orm import DeclarativeBase
class Base(DeclarativeBase):
pass
class Task(Base):
__tablename__ = "task"
id = Column(Integer, primary_key=True)
creator_id = Column(Integer, ForeignKey("user.id"))
owner_id = Column(Integer, ForeignKey("user.id"))
assigned_user_id = Column(Integer, ForeignKey("user.id"))
story_id = Column(Integer, ForeignKey("story.id"))
status = Column(String)
priority = Column(String)
task/schemas.py
from pydantic import BaseModel
class CreateTaskSchema(BaseModel):
creator_id: int | None = None
owner_id: int | None = None
assigned_user_id: int | None = None
story_id: int | None = None
status: str | None = None
priority: str | None = None
class ReadTaskSchema(BaseModel):
id: int
creator_id: int | None = None
owner_id: int | None = None
assigned_user_id: int | None = None
story_id: int | None = None
status: str | None = None
priority: str | None = None
class UpdateTaskSchema(BaseModel):
creator_id: int | None = None
owner_id: int | None = None
assigned_user_id: int | None = None
story_id: int | None = None
status: str | None = None
priority: str | None = None
class DeleteTaskSchema(BaseModel):
pass
Basic Setup:
mymodel_router = crud_router(
session=async_session,
model=MyModel,
create_schema=CreateMyModelSchema,
update_schema=UpdateMyModelSchema,
path="/mymodel",
tags=["MyModel"],
)
With Custom Dependencies:
def get_current_user(token: str = Depends(oauth2_scheme)):
# Implement user retrieval logic
return ...
user_router = crud_router(
session=async_session,
model=User,
create_schema=CreateUserSchema,
update_schema=UpdateUserSchema,
read_deps=[get_current_user],
update_deps=[get_current_user],
path="/users",
tags=["Users"],
)
Adding Delete Endpoints:
product_router = crud_router(
session=async_session,
model=Product,
create_schema=CreateProductSchema,
update_schema=UpdateProductSchema,
delete_schema=DeleteProductSchema,
path="/products",
tags=["Products"],
)
Customizing Path and Tags:
OrderCRUD = FastCRUD[
Order,
CreateOrderSchema,
UpdateOrderSchema,
UpdateOrderSchema,
DeleteOrderSchema,
]
order_router = crud_router(
session=async_session,
model=Order,
create_schema=CreateOrderSchema,
update_schema=UpdateOrderSchema,
crud=OrderCRUD(Order),
path="/orders",
tags=["Orders", "Sales"],
)
Integrating Multiple Models:
ProductCRUD = FastCRUD[
Product,
CreateProductSchema,
UpdateProductSchema,
UpdateProductSchema,
DeleteProductSchema,
]
product_router = crud_router(
session=async_session,
model=Product,
create_schema=CreateProductSchema,
update_schema=UpdateProductSchema,
crud=ProductCRUD(Product),
path="/products",
tags=["Inventory"],
)
CustomerCRUD = FastCRUD[
Customer,
CreateCustomerSchema,
UpdateCustomerSchema,
UpdateCustomerSchema,
DeleteCustomerSchema,
]
customer_router = crud_router(
session=async_session,
model=Customer,
create_schema=CreateCustomerSchema,
update_schema=UpdateCustomerSchema,
crud=CustomerCRUD(Customer),
path="/customers",
tags=["CRM"],
)
With Selective CRUD Methods:
MyModelCRUD = FastCRUD[
MyModel,
CreateMyModelSchema,
UpdateMyModelSchema,
UpdateMyModelSchema,
DeleteMyModelSchema,
]
# Only include 'create' and 'read' methods
mymodel_router = crud_router(
session=async_session,
model=MyModel,
create_schema=CreateMyModelSchema,
update_schema=UpdateMyModelSchema,
crud=MyModelCRUD(MyModel),
path="/mymodel",
tags=["MyModel"],
included_methods=["create", "read"],
)
Using a Custom EndpointCreator
:
class CustomEndpointCreator(EndpointCreator):
def _custom_route(self):
async def custom_endpoint():
# Custom endpoint logic
return {"message": "Custom route"}
return custom_endpoint
async def add_routes_to_router(self, ...):
# First, add standard CRUD routes
super().add_routes_to_router(...)
# Now, add custom routes
self.router.add_api_route(
path="/custom",
endpoint=self._custom_route(),
methods=["GET"],
tags=self.tags,
# Other parameters as needed
)
MyModelCRUD = FastCRUD[
MyModel,
CreateMyModelSchema,
UpdateMyModelSchema,
UpdateMyModelSchema,
DeleteMyModelSchema,
]
mymodel_router = crud_router(
session=async_session,
model=MyModel,
create_schema=CreateMyModelSchema,
update_schema=UpdateMyModelSchema,
crud=MyModelCRUD(MyModel),
path="/mymodel",
tags=["MyModel"],
endpoint_creator=CustomEndpointCreator,
)
app.include_router(mymodel_router)
Customizing Endpoint Names:
task_router = crud_router(
session=async_session,
model=Task,
create_schema=CreateTaskSchema,
update_schema=UpdateTaskSchema,
path="/tasks",
tags=["Task Management"],
endpoint_names={
"create": "add_task",
"read": "get_task",
"update": "modify_task",
"delete": "remove_task",
"db_delete": "permanently_remove_task",
"read_multi": "list_tasks",
},
)
Using FilterConfig
with dict
:
from fastapi import FastAPI
from fastcrud import crud_router
from .database import async_session
from .mymodel.model import MyModel
from .mymodel.schemas import CreateMyModelSchema, UpdateMyModelSchema
app = FastAPI()
mymodel_router = crud_router(
session=async_session,
model=MyModel,
create_schema=CreateMyModelSchema,
update_schema=UpdateMyModelSchema,
filter_config=FilterConfig(filters={"id": None, "name": "default"}),
)
# Adds CRUD routes with filtering capabilities
app.include_router(mymodel_router, prefix="/mymodel")
# Explanation:
# The FilterConfig specifies that 'id' should be a query parameter with no default value
# and 'name' should be a query parameter with a default value of 'default'.
# When fetching multiple items, you can filter by these parameters.
# Example GET request: /mymodel/get_multi?id=1&name=example
Using FilterConfig
with keyword arguments:
from fastapi import FastAPI
from fastcrud import crud_router
from .database import async_session
from .mymodel.model import MyModel
from .mymodel.schemas import CreateMyModelSchema, UpdateMyModelSchema
app = FastAPI()
mymodel_router = crud_router(
session=async_session,
model=MyModel,
create_schema=CreateMyModelSchema,
update_schema=UpdateMyModelSchema,
filter_config=FilterConfig(id=None, name="default"),
)
# Adds CRUD routes with filtering capabilities
app.include_router(mymodel_router, prefix="/mymodel")
# Explanation:
# The FilterConfig specifies that 'id' should be a query parameter with no default value
# and 'name' should be a query parameter with a default value of 'default'.
# When fetching multiple items, you can filter by these parameters.
# Example GET request: /mymodel/get_multi?id=1&name=example
Source code in fastcrud/endpoint/crud_router.py
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