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80 lines
2.2 KiB
ReStructuredText
80 lines
2.2 KiB
ReStructuredText
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.. _fastapi-example:
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FastAPI example
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===============
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.. meta::
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:keywords: Python,Dependency Injection,FastAPI,Example
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:description: This example demonstrates a usage of the FastAPI and Dependency Injector.
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This example shows how to use ``Dependency Injector`` with `FastAPI <https://fastapi.tiangolo.com/>`_.
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The example application is a REST API that searches for funny GIFs on the `Giphy <https://giphy.com/>`_.
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The source code is available on the `Github <https://github.com/ets-labs/python-dependency-injector/tree/master/examples/miniapps/fastapi>`_.
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Application structure
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---------------------
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Application has next structure:
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.. code-block:: bash
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./
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├── giphynavigator/
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│ ├── __init__.py
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│ ├── application.py
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│ ├── containers.py
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│ ├── endpoints.py
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│ ├── giphy.py
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│ ├── services.py
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│ └── tests.py
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├── config.yml
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└── requirements.txt
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Container
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---------
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Declarative container is defined in ``giphynavigator/containers.py``:
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.. literalinclude:: ../../examples/miniapps/fastapi/giphynavigator/containers.py
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:language: python
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Endpoints
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---------
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Endpoint has a dependency on search service. There are also some config options that are used as default values.
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The dependencies are injected using :ref:`wiring` feature.
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Listing of ``giphynavigator/endpoints.py``:
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.. literalinclude:: ../../examples/miniapps/fastapi/giphynavigator/endpoints.py
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:language: python
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Application factory
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-------------------
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Application factory creates container, wires it with the ``endpoints`` module, creates
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``FastAPI`` app, and setup routes.
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Listing of ``giphynavigator/application.py``:
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.. literalinclude:: ../../examples/miniapps/fastapi/giphynavigator/application.py
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:language: python
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Tests
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-----
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Tests use :ref:`provider-overriding` feature to replace giphy client with a mock ``giphynavigator/tests.py``:
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.. literalinclude:: ../../examples/miniapps/fastapi/giphynavigator/tests.py
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:language: python
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:emphasize-lines: 29,57,72
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Sources
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-------
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Explore the sources on the `Github <https://github.com/ets-labs/python-dependency-injector/tree/master/examples/miniapps/fastapi>`_.
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.. disqus::
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