method
build_left_outer_joins
v5.1.7 -
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Class: ActiveRecord::QueryMethods
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build_left_outer_joins(manager, outer_joins)
private
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# File activerecord/lib/active_record/relation/query_methods.rb, line 974 def build_left_outer_joins(manager, outer_joins) buckets = outer_joins.group_by do |join| case join when Hash, Symbol, Array :association_join else raise ArgumentError, "only Hash, Symbol and Array are allowed" end end build_join_query(manager, buckets, Arel::Nodes::OuterJoin) end