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29 lines
1.0 KiB
ReStructuredText
29 lines
1.0 KiB
ReStructuredText
Creating catalog provider bundles
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---------------------------------
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``di.AbstractCatalog.Bundle`` is a limited collection of catalog providers.
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While catalog could be used as a centralized place for particular providers
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group, such bundles of catalog providers can be used for creating several
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limited scopes that could be passed to different subsystems.
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``di.AbstractCatalog.Bundle`` has exactly the same API as
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``di.AbstractCatalog`` except of the limitations on getting providers.
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Each ``di.AbstractCatalog`` has a reference to its bundle class -
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``di.AbstractCatalog.Bundle``. For example, if some concrete catalog has name
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``SomeCatalog``, then its bundle class could be reached as
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``SomeCatalog.Bundle``.
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``di.AbstractCatalog.Bundle`` expects to get the list of its catalog providers
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as positional arguments and will limit the scope of created bundle to this
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list.
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Example:
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.. image:: /images/catalogs/bundles.png
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:width: 100%
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:align: center
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.. literalinclude:: ../../examples/catalogs/bundles.py
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:language: python
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