method

finding_with_ambiguous_select?

v2.2.1 - Show latest stable - 0 notes - Class: ActiveRecord::Associations::HasAndBelongsToManyAssociation

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What's this?

finding_with_ambiguous_select?(select_clause) protected

Join tables with additional columns on top of the two foreign keys must be considered ambiguous unless a select clause has been explicitly defined. Otherwise you can get broken records back, if, for example, the join column also has an id column. This will then overwrite the id column of the records coming back.

Show source

# File activerecord/lib/active_record/associations/has_and_belongs_to_many_association.rb, line 105
        def finding_with_ambiguous_select?(select_clause)
          !select_clause && @owner.connection.columns(@reflection.options[:join_table], "Join Table Columns").size != 2
        end

finding_with_ambiguous_select?

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