[docs fix] Indexing a polymorphic assoc adds index on type and id #19153
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seuros
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Mar 1, 2015
[docs fix] Indexing a polymorphic assoc adds index on type and id
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Yep, you're right and that's how Thanks! |
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thanks @egilburg for noting that. |
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The simplified way of creating a polymorphic association in a migration is:
This will create an index on
[:imageable_id, :imageable_type].The docs show how you can manually create the association instead of using
t.references, but only show adding an index on:imageable_id.