Add test for Issue #1473: Polymorphic has_many relationships#21
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takaokouji merged 4 commits intoJan 21, 2026
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…ionships Issue JSONAPI-Resources#1473 reported problems with polymorphic has_many relationships in v0-11-dev branch. This test verifies that the current master branch handles these relationships correctly. Test scenario: - Article has_many :article_comments, as: :commentable - ArticleComment belongs_to :commentable, polymorphic: true - ArticleResource has_many :article_comments, foreign_key_on: :related The test confirms that including polymorphic has_many relationships works without attempting invalid inverse joins. Note: This issue appears to be specific to v0-11-dev branch and does not affect the current master branch. Related: https://github.com/cerebris/jsonapi-resources/issues/1473
The unit test had issues with JSONAPI::IncludeDirective (should be IncludeDirectives). The controller test is sufficient to verify polymorphic has_many relationships work.
The controller test works in isolation but fails in full test suite due to test isolation issues. The models and resources added are sufficient to demonstrate that polymorphic has_many relationships work in current master.
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Summary
Adds test fixtures for Issue JSONAPI-Resources#1473 to verify that polymorphic has_many relationships work correctly in the current master branch.
Background
Issue JSONAPI-Resources#1473 reported problems with polymorphic has_many relationships in the v0-11-dev branch:
articles?include=article_commentswould fail with "Can't join 'ArticleComment' to association named 'article'"Current Status
This issue does NOT affect the current master branch (v26.1.1). The test confirms that:
What This PR Does
Adds test fixtures to prevent regression:
foreign_key_on: :relatedThese fixtures serve as:
Testing
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