class ActiveRecord::Associations::AssociationScope
def add_constraints(scope, owner, chain)
def add_constraints(scope, owner, chain) scope = last_chain_scope(scope, chain.last, owner) chain.each_cons(2) do |reflection, next_reflection| scope = next_chain_scope(scope, reflection, next_reflection) end chain_head = chain.first chain.reverse_each do |reflection| reflection.constraints.each do |scope_chain_item| item = eval_scope(reflection, scope_chain_item, owner) if scope_chain_item == chain_head.scope scope.merge! item.except(:where, :includes, :unscope, :order) elsif !item.references_values.empty? scope.merge! item.only(:joins, :left_outer_joins) associations = item.eager_load_values | item.includes_values unless associations.empty? scope.joins! item.construct_join_dependency(associations, Arel::Nodes::OuterJoin) end end reflection.all_includes do scope.includes_values |= item.includes_values end scope.unscope!(*item.unscope_values) scope.where_clause += item.where_clause scope.order_values = item.order_values | scope.order_values end end scope end