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52 lines
1.3 KiB
ReStructuredText
52 lines
1.3 KiB
ReStructuredText
Decorators
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==========
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Current section of *Objects* documentation describes several useful decorators.
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@inject decorator
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-----------------
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``@inject`` decorator can be used for making *inline* dependency injections.
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It *patches* decorated callable in such way that dependency injection will be
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done before every call of decorated callable.
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``@inject`` decorator takes only argument that is supposed to be an
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``objects.injections.Injection`` instance.
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Any Python object will be injected *as is*, except *Objects* providers,
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that will be called to provide injectable value.
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Below is an example of how Flask's view could be patched using ``@inject``
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decorator:
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.. code-block:: python
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"""`@inject` decorator example."""
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from objects.providers import NewInstance
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from objects.injections import KwArg
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from objects.injections import inject
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new_object = NewInstance(object)
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@inject(KwArg('object_a', new_object))
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@inject(KwArg('some_setting', 1334))
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def example_callback(object_a, some_setting):
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"""This function has dependencies on object a and b.
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Dependencies are injected using `@inject` decorator.
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"""
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assert isinstance(object_a, object)
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assert some_setting == 1334
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example_callback()
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example_callback()
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@override decorator
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-------------------
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