structure_dump

# File activerecord/lib/active_record/tasks/postgresql_database_tasks.rb, line 46
      def structure_dump(filename, extra_flags)
        search_path =            case ActiveRecord.dump_schemas
          when :schema_search_path
            configuration_hash[:schema_search_path]
          when :all
            nil
          when String
            ActiveRecord.dump_schemas
          end

        args = ["--schema-only", "--no-privileges", "--no-owner"]
        args.concat(["--file", filename])

        args.concat(Array(extra_flags)) if extra_flags

        unless search_path.blank?
          args += search_path.split(",").map do |part|
            "--schema=#{part.strip}"
          end
        end

        ignore_tables = ActiveRecord::SchemaDumper.ignore_tables
        if ignore_tables.any?
          ignore_tables = connection.data_sources.select { |table| ignore_tables.any? { |pattern| pattern === table } }
          args += ignore_tables.flat_map { |table| ["-T", table] }
        end

        args << db_config.database
        run_cmd("pg_dump", args, "dumping")
        remove_sql_header_comments(filename)
        File.open(filename, "a") { |f| f << "SET search_path TO #{connection.schema_search_path};\n\n" }
      end