将值写入Firebase数据库时，会自动在其中创建键和路径.因此，要生成路径info/important/personal，您需要在其下写一个值.例如:

Keys and paths in the Firebase Database are automatically created when you write a value to them. So to generate the path info/important/personal, you would write a value under it. For example:

firebase.database().ref('info/important/personal').set(true);

这将生成以下JSON:

This will generate the following JSON:

{
  "info": {
    "important": {
      "personal": true
    }
  }
}

请注意，相反情况也是如此:Firebase会自动删除空键/路径.因此，如果您删除上面的true，则整个JSON将被删除.

Note that the inverse is also true: Firebase will automatically remove empty keys/paths. So if you delete the true above, the entire JSON will be deleted.