ruby 在rails中查询关联

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@shops = Shop.includes(concept: [:chain]).where(where_clause_map).order("#{attribute} #{ordering}").limit(params[:rowCount]).offset(offset)

Where:

Shop includes concept and in turn concept includes chain

and 

where_clause_map looks like: {"id" => "[1,2]", "shop_concepts" => "1" ,"shop_chains.id"=> "1"}

NOTE: Using an array as in: "id" => "[1,2]" , causes the query to run as id IN (1, 2)

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