mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-30 13:33:59 +03:00
61 lines
2.1 KiB
ReStructuredText
61 lines
2.1 KiB
ReStructuredText
Catalog provider bundles
|
|
------------------------
|
|
|
|
.. module:: dependency_injector.catalogs
|
|
|
|
:py:class:`CatalogBundle` is a frozen, limited collection of catalog
|
|
providers. While catalog could be used as a centralized place for
|
|
particular providers group, such bundles of catalog providers can be used
|
|
for creating several frozen, limited scopes that could be passed to different
|
|
subsystems.
|
|
|
|
:py:class:`CatalogBundle` has API's parity with catalogs
|
|
(:py:class:`DeclarativeCatalog` or :py:class:`DynamicCatalog`) in terms of
|
|
retrieving the providers, but it is "frozen" in terms of modification
|
|
provider's list.
|
|
|
|
:py:class:`CatalogBundle` is considered to be dependable on catalogs
|
|
(:py:class:`DeclarativeCatalog` or :py:class:`DynamicCatalog`) entity by
|
|
its design.
|
|
|
|
Each catalog (:py:class:`DeclarativeCatalog` or :py:class:`DynamicCatalog`)
|
|
has a reference to its bundle class - :py:attr:`DeclarativeCatalog.Bundle`
|
|
(or :py:attr:`DynamicCatalog.Bundle` consequently). For example, subclass of
|
|
:py:class:`CatalogBundle` for some concrete declarative catalog
|
|
``SomeCatalog`` could be reached as ``SomeCatalog.Bundle``.
|
|
|
|
:py:class:`CatalogBundle` expects to get the list of its catalog providers
|
|
as positional arguments and will limit the scope of created bundle to this
|
|
list.
|
|
|
|
.. note::
|
|
|
|
Some notes about :py:class:`CatalogBundle` design.
|
|
|
|
Design and syntax of :py:class:`CatalogBundle` was developed with the idea
|
|
of keeping full functionalities of type-hinting and introspection of
|
|
modern IDE's. This design came from some practical experience of using
|
|
:py:class:`CatalogBundle` and considered to be the most comfortable for
|
|
developer.
|
|
|
|
Example:
|
|
|
|
.. image:: /images/catalogs/bundles.png
|
|
:width: 100%
|
|
:align: center
|
|
|
|
Listing of `services.py`:
|
|
|
|
.. literalinclude:: ../../examples/catalogs/bundles/services.py
|
|
:language: python
|
|
|
|
Listing of `views.py`:
|
|
|
|
.. literalinclude:: ../../examples/catalogs/bundles/views.py
|
|
:language: python
|
|
|
|
Listing of `catalogs.py`:
|
|
|
|
.. literalinclude:: ../../examples/catalogs/bundles/catalogs.py
|
|
:language: python
|