Question

我试图通过使用object.assign向每个运动对象添加一个标识符键，但是，如果我添加同一对象的多个倍数。

新的object.assign会覆盖所有具有相同名称的键（directId）。我尝试过使用循环，映射，将时间戳记添加到键中，以查看如果对象完全相同，则uuidv1是否给出相同的keyid，但我不相信这是正确的。

似乎与object.assign有关。

该函数在每次按下新对象时运行，而uuidv1（）是唯一的密钥生成器。

不确定接下来要尝试什么。

  saveDataToWorkout = obj => {
    const objWithId = Object.assign(obj, { directId: uuidv1() });
    this.setState({
      pendingSavedArr: [...this.state.pendingSavedArr, objWithId]
    });
  };

04:16:45: Array [
04:16:45:   Object {
04:16:45:     "avatarURL": 16,
04:16:45:     "difficulty": "Easy",
04:16:45:     "directId": "d50d5310-c7ad-11e8-a726-e942788f9851",
04:16:45:     "equipment": "Machine",
04:16:45:     "estimatedTime": 5,
04:16:45:     "muscleGroup": "Shoulders and Traps",
04:16:45:     "title": "Leverage Shrug",
04:16:45:   },
04:16:45:   Object {
04:16:45:     "avatarURL": 16,
04:16:45:     "difficulty": "Easy",
04:16:45:     "directId": "d61e4de0-c7ad-11e8-a726-e942788f9851",
04:16:45:     "equipment": "Machine",
04:16:45:     "estimatedTime": 5,
04:16:45:     "muscleGroup": "Shoulders and Traps",
04:16:45:     "title": "Smith Machine Shrug",
04:16:45:   },
04:16:45: ]

在传递到反应状态之前，应通过对象分配添加唯一键。

04:16:46: Array [
04:16:46:   Object {
04:16:46:     "avatarURL": 16,
04:16:46:     "difficulty": "Easy",
04:16:46:     "directId": "d50d5310-c7ad-11e8-a726-e942788f9851",
04:16:46:     "equipment": "Machine",
04:16:46:     "estimatedTime": 5,
04:16:46:     "muscleGroup": "Shoulders and Traps",
04:16:46:     "title": "Leverage Shrug",
04:16:46:   },
04:16:46:   Object {
04:16:46:     "avatarURL": 16,
04:16:46:     "difficulty": "Easy",
04:16:46:     "directId": "d61e4de0-c7ad-11e8-a726-e942788f9851",
04:16:46:     "equipment": "Machine",
04:16:46:     "estimatedTime": 5,
04:16:46:     "muscleGroup": "Shoulders and Traps",
04:16:46:     "title": "Smith Machine Shrug",
04:16:46:   },
04:16:46:   Object {
04:16:46:     "avatarURL": 16,
04:16:46:     "difficulty": "Easy",
04:16:46:     "directId": "d6924560-c7ad-11e8-a726-e942788f9851",
04:16:46:     "equipment": "Dumbbell",
04:16:46:     "estimatedTime": 5,
04:16:46:     "muscleGroup": "Shoulders and Traps",
04:16:46:     "title": "Smith Machine Behind the Back Shrug",
04:16:46:   },
04:16:46: ]

Answer 1

您可以将值分配给一个空对象，以防止对结果数组的相同引用。

const objWithId = Object.assign({}, obj, { directId: uuidv1() });

object.assign正在使用重复信息覆盖我数组中的所有对象

1 个答案: