javascript - react 类型错误 "not assignable to parameter of type ' never'"

Question

我想要做的是遍历当前的 posttype 和“产品”，但我正在努力处理这些类型。所以我收到以下错误:

Argument of type 'Record<string, any>[]' is not assignable to parameter of type 'never'.

在这部分:

...pages.map((page) => ({

我的代码:

  const pages = useSelect((select) => {
    const editor = select("core/editor");
    const currentPostType: string = editor.getCurrentPostType();
    const selectablePostTypes = [currentPostType, "products"];

    const postList = [];

    selectablePostTypes.forEach((singlePostType) => {
      const records: Record<string, any>[] = select("core").getEntityRecords(
        "postType",
        singlePostType
      );

      postList.push(records);
    });
  });

  // Make dropdown of pagesOptions
  const pagesOptions = [
    ...[
      {
        value: "0",
        label: __("No page selected", "demosite"),
      },
    ],
    ...pages.map((page) => ({
      value: page.id,
      label: page.title,
    })),
  ];

添加有效的代码:

  const pages = useSelect((select) => {
    const editor = select("core/editor");
    const postType: string = editor.getCurrentPostType();
    const records: Record<string, any>[] = select("core").getEntityRecords(
      "postType",
      postType
    );

    return records
      ? records.map((record) => ({
          description: record.description,
          id: record.id,
          featuredMedia: record.featuredMedia,
          link: record.link,
          subtitle: record.subtitle,
          title: record.title.rendered,
        }))
      : [];
  });

这里它针对一种帖子类型，即您当前正在编辑的帖子类型，但我想在一些帖子类型上循环。
例子:

const selectablePostTypes = ['page', 'post', 'product'];

Answer 1

这是您对 postList 的初始化

const postList = [];

因为您没有为 typescript 提供任何值来“找出”应该属于该数组的内容的类型签名，所以它将其设置为

never[]

这意味着它禁止您向该空数组添加任何值。在此处添加类型

const postList: Record<string, any>[][] = [];