Redux的对象数组的Normalizr模式-Java 学习之路

我的api当前回复如下：

[
   {  
      "device_id": "1234",
      "network_status": "Offline",
      "status": "Yes",
      "frequency": 50,

   },
   {  
      "device_id": "12345",
      "network_status": "online",
      "status": "no",
      "frequency": 123,

   },
   {  
      "device_id": "12346",
      "network_status": "online",
      "status": "no",
      "frequency": 423,

   },
]

我知道这些文档已经更新，所以在堆栈上查看其他问题我还没有找到类似的例子 . 'responseData'包含来自api的响应，api是一个对象数组 . [{}，{}，...]

我的代码是

import { schema } from 'normalizr';

const deviceid = new schema.Entity('device_id');
const arrayOfDevices = new schema.Array({
  device_id : deviceid,
})

normalize(responseData, arrayOfDevices)

我想获得以下输出 . 具有device_id作为每个对象的键的实体对象 .

{
  entities: {
    device_id: { 
      '1234' : {
        .....
      },
      '12345' : {
        .....
      } ,
      '123456' : {
        .....
      }
    }
  },
  result: [
    ['1234','12345','123456'],
  ]
}

但是，我似乎只是通过一个空实体获得以下响应，其他所有内容都被推送到结果中

{
  entities: {},
  result: [
   {  
      "device_id": "1234",
      "network_status": "Offline",
      "status": "Yes",
      "frequency": 50,

   },
   {  
      "device_id": "12345",
      "network_status": "online",
      "status": "no",
      "frequency": 123,

   },
   {  
      "device_id": "12346",
      "network_status": "online",
      "status": "no",
      "frequency": 423,

   },
  ]
}

我的normalizr代码似乎缺少什么？

1 回答

Normalizr希望您的实体拥有 id 道具 . 如果包含id的字段具有其他名称，则必须明确定义它：

import { normalize, schema } from 'normalizr';

const data = [
  {
    "device_id": "1234",
    "network_status": "Offline",
    "status": "Yes",
    "frequency": 50,

  },
  {
    "device_id": "12345",
    "network_status": "online",
    "status": "no",
    "frequency": 123,

  },
  {
    "device_id": "12346",
    "network_status": "online",
    "status": "no",
    "frequency": 423,

  },
];

const device = new schema.Entity('devices', {}, { idAttribute: 'device_id' });

const normalizedData = normalize(data, [device]);

console.log(normalized);

Output:

{
    "entities": {
        "devices": {
            "1234": {
                "device_id": "1234",
                "network_status": "Offline",
                "status": "Yes",
                "frequency": 50
            },
            "12345": {
                "device_id": "12345",
                "network_status": "online",
                "status": "no",
                "frequency": 123
            },
            "12346": {
                "device_id": "12346",
                "network_status": "online",
                "status": "no",
                "frequency": 423
            }
        }
    },
    "result": [
        "1234",
        "12345",
        "12346"
    ]
}

Edit w0z95yy8zl

还要与normalizr docs中的this example进行比较 .

我建议不要将id字段命名为 device_id ，因为如果您正确命名保存实体的变量，这通常是多余的 . 如果你是有一个设备数组，你应该命名为 devices . 然后很明显，里面对象的 id 字段是设备ID . 无需在属性名称中重复此操作 .

回复于 2024-05-03T12:51:05+08:00

Redux的对象数组的Normalizr模式

1 回答

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