method
references
Ruby on Rails latest stable (v7.1.3.2)
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Class: ActiveRecord::QueryMethods
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- What's this?
references(*table_names)
public
Use to indicate that the given table_names are referenced by an SQL string, and should therefore be +JOIN+ed in any query rather than loaded separately. This method only works in conjunction with #includes. See #includes for more details.
User.includes(:posts).where("posts.name = 'foo'") # Doesn't JOIN the posts table, resulting in an error. User.includes(:posts).where("posts.name = 'foo'").references(:posts) # Query now knows the string references posts, so adds a JOIN