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Update CLI tutorial
This commit is contained in:
Roman Mogylatov
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@ -428,7 +428,7 @@ Edit ``containers.py``:
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class Container(containers.DeclarativeContainer):
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config = providers.Configuration()
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config = providers.Configuration(yaml_files=["config.yml"])
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movie = providers.Factory(entities.Movie)
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@ -445,15 +445,9 @@ This is also called the delegation of the provider. If we just pass the movie fa
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as the dependency, it will be called when csv finder is created and the ``Movie`` instance will
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be injected. With the ``.provider`` attribute the provider itself will be injected.
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The csv finder also has a few dependencies on the configuration options. We added configuration
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provider to provide these dependencies.
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.. note::
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We have used the configuration value before it was defined. That's the principle how the
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Configuration provider works.
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Use first, define later.
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The csv finder also has a few dependencies on the configuration options. We added a configuration
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provider to provide these dependencies and specified the location of the configuration file.
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The configuration provider will parse the configuration file when we create a container instance.
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Not let's define the configuration values.
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@ -467,29 +461,7 @@ Edit ``config.yml``:
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path: "data/movies.csv"
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delimiter: ","
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The configuration file is ready. Now let's update the ``main()`` function to specify its location.
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Edit ``__main__.py``:
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.. code-block:: python
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:emphasize-lines: 12
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"""Main module."""
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from .containers import Container
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def main() -> None:
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...
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if __name__ == "__main__":
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container = Container()
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container.config.from_yaml("config.yml")
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main()
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Move on to the lister.
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The configuration file is ready. Move on to the lister.
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Create the ``listers.py`` in the ``movies`` package:
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@ -552,7 +524,7 @@ and edit ``containers.py``:
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class Container(containers.DeclarativeContainer):
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config = providers.Configuration()
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config = providers.Configuration(yaml_files=["config.yml"])
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movie = providers.Factory(entities.Movie)
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@ -575,7 +547,7 @@ Let's inject the ``lister`` into the ``main()`` function.
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Edit ``__main__.py``:
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.. code-block:: python
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:emphasize-lines: 3-5,9-10,17
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:emphasize-lines: 3-5,9-10,16
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"""Main module."""
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@ -592,7 +564,6 @@ Edit ``__main__.py``:
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if __name__ == "__main__":
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container = Container()
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container.config.from_yaml("config.yml")
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container.wire(modules=[__name__])
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main()
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@ -628,7 +599,6 @@ Edit ``__main__.py``:
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if __name__ == "__main__":
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container = Container()
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container.config.from_yaml("config.yml")
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container.wire(modules=[__name__])
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main()
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@ -733,7 +703,7 @@ Edit ``containers.py``:
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class Container(containers.DeclarativeContainer):
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config = providers.Configuration()
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config = providers.Configuration(yaml_files=["config.yml"])
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movie = providers.Factory(entities.Movie)
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@ -822,7 +792,7 @@ Edit ``containers.py``:
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class Container(containers.DeclarativeContainer):
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config = providers.Configuration()
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config = providers.Configuration(yaml_files=["config.yml"])
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movie = providers.Factory(entities.Movie)
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@ -859,7 +829,7 @@ Now we need to read the value of the ``config.finder.type`` option from the envi
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Edit ``__main__.py``:
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.. code-block:: python
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:emphasize-lines: 23
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:emphasize-lines: 22
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"""Main module."""
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@ -882,7 +852,6 @@ Edit ``__main__.py``:
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if __name__ == "__main__":
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container = Container()
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container.config.from_yaml("config.yml")
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container.config.finder.type.from_env("MOVIE_FINDER_TYPE")
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container.wire(modules=[sys.modules[__name__]])
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@ -942,7 +911,7 @@ Create ``tests.py`` in the ``movies`` package:
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and put next into it:
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.. code-block:: python
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:emphasize-lines: 35,50
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:emphasize-lines: 36,51
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"""Tests module."""
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@ -955,8 +924,8 @@ and put next into it:
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@pytest.fixture
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def container():
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container = Container()
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container.config.from_dict({
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container = Container(
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config={
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"finder": {
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"type": "csv",
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"csv": {
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@ -967,7 +936,8 @@ and put next into it:
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"path": "/fake-movies.db",
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},
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},
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})
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},
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)
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return container
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@ -1010,24 +980,24 @@ You should see:
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.. code-block::
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platform darwin -- Python 3.9, pytest-5.4.3, py-1.9.0, pluggy-0.13.1
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plugins: cov-2.10.0
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platform darwin -- Python 3.10.0, pytest-6.2.5, py-1.10.0, pluggy-1.0.0
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plugins: cov-3.0.0
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collected 2 items
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movies/tests.py .. [100%]
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---------- coverage: platform darwin, python 3.9 -----------
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---------- coverage: platform darwin, python 3.10 -----------
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Name Stmts Miss Cover
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------------------------------------------
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movies/__init__.py 0 0 100%
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movies/__main__.py 18 18 0%
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movies/__main__.py 16 16 0%
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movies/containers.py 9 0 100%
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movies/entities.py 7 1 86%
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movies/finders.py 26 13 50%
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movies/listers.py 8 0 100%
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movies/tests.py 24 0 100%
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movies/tests.py 23 0 100%
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------------------------------------------
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TOTAL 92 32 65%
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TOTAL 89 30 66%
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.. note::
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@ -1047,7 +1017,7 @@ We've used the ``Dependency Injector`` as a dependency injection framework.
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With a help of :ref:`containers` and :ref:`providers` we have defined how to assemble application components.
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``Selector`` provider served as a switch for selecting the database format based on a configuration.
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:ref:`configuration-provider` helped to deal with reading YAML file and environment variable.
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:ref:`configuration-provider` helped to deal with reading a YAML file and environment variables.
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We used :ref:`wiring` feature to inject the dependencies into the ``main()`` function.
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:ref:`provider-overriding` feature helped in testing.
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