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  1. Mongoid
  2. MONGOID-5734

Allow custom polymorphic types

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    • Type: Icon: New Feature New Feature
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 9.0.2
    • Affects Version/s: None
    • Component/s: Persistence
    • Fully Compatible
    • Needed
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      1. What would you like to communicate to the user about this feature?

      The description of the PR (here: https://github.com/mongodb/mongoid/pull/5845) includes a description of the way the code worked prior to this change, as well as a description of the API following this change.

      2. Would you like the user to see examples of the syntax and/or executable code and its output?

      Yes, please, per the examples given at the link mentioned above.

      3. Which versions of the driver/connector does this apply to?

      This applies to Mongoid 9.0.1 and later. (We are contemplating backporting to 8.1.x.)

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      1. What would you like to communicate to the user about this feature? The description of the PR (here: https://github.com/mongodb/mongoid/pull/5845 ) includes a description of the way the code worked prior to this change, as well as a description of the API following this change. 2. Would you like the user to see examples of the syntax and/or executable code and its output? Yes, please, per the examples given at the link mentioned above. 3. Which versions of the driver/connector does this apply to? This applies to Mongoid 9.0.1 and later. (We are contemplating backporting to 8.1.x.)

      Mongoid supports polymorphism for has_one, has_many, embeds_one, and embeds_many. Current implementation stores parent actual class name in the child collection. For example, for this association belongs_to :unit, polymorphic: true the class name is stored in unit_type attribute.

      There is a demand to be able to infer the class name at runtime. See this article for example.

      We should allow storing arbitrary string in *_type attributes, and let the application code decide what is an actual class of the association's target.

            Assignee:
            jamis.buck@mongodb.com Jamis Buck
            Reporter:
            dmitry.rybakov@mongodb.com Dmitry Rybakov
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            4 Start watching this issue

              Created:
              Updated:
              Resolved: