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fastapi-users/docs/usage/dependency-callables.md
2020-05-25 08:13:42 +02:00

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# Dependency callables
**FastAPI Users** provides dependency callables to easily inject users in your routes. They are available from your `FastAPIUsers` instance.
!!! tip
For more information about how to make an authenticated request to your API, check the documentation of your [Authentication method](../configuration/authentication/index.md).
## `get_current_user`
Get the current user (**active or not**). Will throw a `401 Unauthorized` if missing or wrong credentials.
```py
@app.get("/protected-route")
def protected_route(user: User = Depends(fastapi_users.get_current_user)):
return f"Hello, {user.email}"
```
## `get_current_active_user`
Get the current active user. Will throw a `401 Unauthorized` if missing or wrong credentials or if the user is not active.
```py
@app.get("/protected-route")
def protected_route(user: User = Depends(fastapi_users.get_current_active_user)):
return f"Hello, {user.email}"
```
## `get_current_superuser`
Get the current superuser. Will throw a `401 Unauthorized` if missing or wrong credentials or if the user is not active. Will throw a `403 Forbidden` if the user is not a superuser.
```py
@app.get("/protected-route")
def protected_route(user: User = Depends(fastapi_users.get_current_superuser)):
return f"Hello, {user.email}"
```
## `get_optional_current_user`
Get the current user (**active or not**). Will return `None` if missing or wrong credentials. It can be useful if you wish to change the behaviour of your endpoint if a user is logged in or not.
```py
@app.get("/optional-user-route")
def optional_user_route(user: Optional[User] = Depends(fastapi_users.get_optional_current_user)):
if user:
return f"Hello, {user.email}"
else:
return "Hello, anonymous"
```
## `get_optional_current_active_user`
Get the current active user. Will return `None` if missing or wrong credentials. It can be useful if you wish to change the behaviour of your endpoint if a user is logged in or not.
```py
@app.get("/optional-user-route")
def optional_user_route(user: User = Depends(fastapi_users.get_optional_current_active_user)):
if user:
return f"Hello, {user.email}"
else:
return "Hello, anonymous"
```
## `get_optional_current_superuser`
Get the current superuser. Will return `None` if missing or wrong credentials. It can be useful if you wish to change the behaviour of your endpoint if a user is logged in or not.
```py
@app.get("/optional-user-route")
def optional_user_route(user: User = Depends(fastapi_users.get_optional_current_superuser)):
if user:
return f"Hello, {user.email}"
else:
return "Hello, anonymous"
```
## In path operation
If you don't need a user, you can use more clear way:
```py
@app.get("/protected-route", dependencies=[Depends(fastapi_users.get_current_superuser)])
def protected_route():
return "Hello, some user."
```
You can read more about this [in FastAPI docs](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-in-path-operation-decorators/).