Remove polymorphic check when generating associating methods #1990
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When doing a has_many with a polymorphic association, these were previously a generic/untyped collectionproxy. I'm not actually sure that needs to be the case since it appears that you should be getting a CollectionProxy of the model of the association.
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amomchilov
reviewed
Aug 30, 2024
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Hey @matthewarkin, thanks for your first contribution!
We'd be happy to merge this in, but there's an error in our CI that I don't have time to troubleshoot and fix myself. Could you take a look?
| @@ -287,7 +287,7 @@ def populate_collection_assoc_getter_setter(klass, association_name, reflection) | |||
| def type_for(reflection) | |||
| validate_reflection!(reflection) | |||
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| return "T.untyped" if !constant.table_exists? || polymorphic_association?(reflection) | |||
| return "T.untyped" if !constant.table_exists? | |||
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| T.must(qualified_name_of(reflection.klass)) | |||
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Hmmm, I'm getting a failure when running against our core monolith:
Error: `Tapioca::Dsl::Compilers::ActiveRecordAssociations` failed to generate RBI for `OurModel`
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| /tmp/bundle/ruby/3.4.0+0/bundler/gems/rails-f0fd6ab1259b/activerecord/lib/active_record/reflection.rb:500:in 'ActiveRecord::Reflection::AssociationReflection#compute_class': Polymorphic associations do not support computing the class. (ArgumentError)
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| raise ArgumentError, "Polymorphic associations do not support computing the class."
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| from /tmp/bundle/ruby/3.4.0+0/bundler/gems/rails-f0fd6ab1259b/activerecord/lib/active_record/reflection.rb:439:in 'ActiveRecord::Reflection::MacroReflection#_klass'
| from /tmp/bundle/ruby/3.4.0+0/bundler/gems/rails-f0fd6ab1259b/activerecord/lib/active_record/reflection.rb:431:in 'ActiveRecord::Reflection::MacroReflection#klass'
| from /tmp/bundle/ruby/3.4.0+0/bundler/gems/tapioca-b0eab561b24b/lib/tapioca/dsl/compilers/active_record_associations.rb:292:in 'Tapioca::Dsl::Compilers::ActiveRecordAssociations#type_for'
Where OurModel looks something like this, with a polymorphic belongs_to:
class OurModel < ApplicationRecord
belongs_to :reference, polymorphic: true
endThere was a problem hiding this comment.
Awesome, this is super useful, I can work on this
amomchilov
reviewed
Aug 30, 2024
| @@ -287,7 +287,7 @@ def populate_collection_assoc_getter_setter(klass, association_name, reflection) | |||
| def type_for(reflection) | |||
| validate_reflection!(reflection) | |||
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| return "T.untyped" if !constant.table_exists? || polymorphic_association?(reflection) | |||
| return "T.untyped" if !constant.table_exists? | |||
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Lint fix:
Suggested change
| return "T.untyped" if !constant.table_exists? | |
| return "T.untyped" unless constant.table_exists? |
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Motivation
We noticed when adding some typing to our code that association methods for polymorphic associations were returning a generic
ActiveRecord::Associations::CollectionProxyinstead of theModel::PrivateCollectionProxythat is used elsewhere in tapioca.Implementation
I believe checking for the polymorphicness of the association is actually unnecessary since it shouldn't ever be the case that the association for a
has_manywould return a collection of different types.Tests
I updated the existing tests to reflect the updated behavior. I don't think I'm missing a test case but thats mostly because I can't think of a case where you woudn't be able to pin the method to a specific model/type.