打字稿：在界面中格式化嵌套类型

Question

I have interface CountersData that I would like to model off of my JSON data. As seen below, I have a nested id (in example below 1830 and 1835 are ids ) property that is a array of a nested dictionaries, which I also want to be optional .

I have been unable to make it optional, so I am unable to fetch the proper data. How should this data be formatted? See below my code and the JSON format.

interface CountersData {
  //other properties

  //want this to be optional
  [id: number]: {
    count_targets: number;
    count_targets_excluded: number;
    count_targets_pending: number;
    count_targets_in_progress: number;
    count_targets_completed: number;
    count_targets_failed: number;
  }[];

  [key: string]: number | string | any | undefined;
}

Answer 1

您的示例非常好，结帐游乐场。

Answer 2

You can make the property optional like this:

type CountersData = {
    [key in number]?: {
        count_targets: number;
        count_targets_excluded: number;
        count_targets_pending: number;
        count_targets_in_progress: number;
        count_targets_completed: number;
        count_targets_failed: number;
    }[];
} & { [key: string]: number | string | any | undefined };