Module: ActiveRecord::QueryMethods

Defined in:
lib/activerecord-multi-tenant/query_rewriter.rb

Instance Method Summary collapse

Instance Method Details

#build_arel(*args) ⇒ Object 



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# File 'lib/activerecord-multi-tenant/query_rewriter.rb', line 270

def build_arel(*args)
  arel = build_arel_orig(*args)

  if !MultiTenant.with_write_only_mode_enabled?
    visitor = MultiTenant::ArelTenantVisitor.new(arel)

    visitor.contexts.each do |context|
      node = context.arel_node

      context.unhandled_relations.each do |relation|
        model = MultiTenant.multi_tenant_model_for_table(relation.arel_table.table_name)

        if MultiTenant.current_tenant_id
          enforcement_clause = MultiTenant::TenantEnforcementClause.new(relation.arel_table[model.partition_key])
          case node
          when Arel::Nodes::Join #Arel::Nodes::OuterJoin, Arel::Nodes::RightOuterJoin, Arel::Nodes::FullOuterJoin
            node.right.expr = node.right.expr.and(enforcement_clause)
          when Arel::Nodes::SelectCore
            if node.wheres.empty?
              node.wheres = [enforcement_clause]
            else
              node.wheres[0] = enforcement_clause.and(node.wheres[0])
            end
          else
            raise "UnknownContext"
          end
        end

        if node.is_a?(Arel::Nodes::SelectCore) || node.is_a?(Arel::Nodes::Join)

          if node.is_a?Arel::Nodes::Join
            node_list = [node]
          else
            node_list = node.source.right
          end

          node_list.select{ |n| n.is_a? Arel::Nodes::Join }.each do |node_join|
            if !node_join.right || !node_join.right.expr.right.is_a?(Arel::Attributes::Attribute)
              next
            end

            relation_right = node_join.right.expr.right.relation
            relation_left = node_join.right.expr.left.relation
            model_left = MultiTenant.multi_tenant_model_for_table(relation_right.table_name)
            model_right = MultiTenant.multi_tenant_model_for_table(relation_left.table_name)
            if model_right && model_left
              join_enforcement_clause = MultiTenant::TenantJoinEnforcementClause.new(relation_left[model_left.partition_key], relation_right)
              node_join.right.expr = node_join.right.expr.and(join_enforcement_clause)
            end
          end
        end
      end
    end
  end

  arel
end

#build_arel_orig ⇒ Object 



269
 
# File 'lib/activerecord-multi-tenant/query_rewriter.rb', line 269

alias :build_arel_orig :build_arel