Question

将如下所示的api响应解析为所需格式的最佳方法是什么？通常我会使用Enum.reduce，但因为有嵌套在地图中的列表，我不知道如何构建累加器。

api_resonse = 
    [
     %{"meta" => %{"labels" => %{"app" => "api-app"}},
       "spec" => %{"container" => [%{"resources = %{}, image" => "gcr"}]},
       "status" =>[%{"type" => "updated", "state" => %{"running"}}]
      },
     %{"meta" => %{"labels" => %{"app" => "user-app"}},
       "spec" => %{"container" => [%{"resources = %{}, image" => "dcr"}]},
       "status" =>[%{"type" => "updated", "state" => %{"running"}}]
      },
     %{"meta" => %{"labels" => %{"app" => "admin-app"}},
       "spec" => %{"container" => [%{"resources = %{}, image" => "gcr"}]},
       "status" =>[%{"type" => "updated", "state" => %{"failed"}}]
      }
    ]


expected output =
    %{
      "api-app" => %{ "image" => "gcr", "state" => "running"}, 
      "user-app" => %{ "image" => "dcr", "state" => "running"},
      "admin-app" => %{ "image" => "gcr", "state" => "failed"}
     }

Answer 1

您可以使用Enum.map/2和模式匹配。有一些语法错误，所以我稍微改变了输入。

api_response =
    [
     %{"meta" => %{"labels" => %{"app" => "api-app"}},
       "spec" => %{"container" => [%{"resources" => %{}, "image" => "gcr"}]},
       "status" =>[%{"type" => "updated", "state" => "running"}]
      },
     %{"meta" => %{"labels" => %{"app" => "user-app"}},
       "spec" => %{"container" => [%{"resources" => %{}, "image" => "dcr"}]},
       "status" =>[%{"type" => "updated", "state" => "running"}]
      },
     %{"meta" => %{"labels" => %{"app" => "admin-app"}},
       "spec" => %{"container" => [%{"resources" => %{}, "image" => "gcr"}]},
       "status" =>[%{"type" => "updated", "state" => "failed"}]
      }
    ]

api_response
|> Enum.map(fn
  %{"meta" => %{"labels" => %{"app" => app}},
    "spec" => %{"container" => [%{"resources" => %{}, "image" => image}]},
    "status" => [%{"type" => "updated", "state" => state}]} ->
      {app, %{"image" => image, "state" => state}}
end)
|> Map.new
|> IO.inspect

输出：

%{"admin-app" => %{"image" => "gcr", "state" => "failed"},
  "api-app" => %{"image" => "gcr", "state" => "running"},
  "user-app" => %{"image" => "dcr", "state" => "running"}}

Elixir：将深层嵌套的api响应转换为地图

1 个答案: