如何更新 Firestore 中的嵌套数组？

Question

有没有办法用 firebase firestore 更新点赞和回复？

当我对一条评论点赞时，我已经到了那一刻，但我只有对整个帖子的文档的引用，所以我没有对评论本身的引用。 我还使用 arrays 的查找方法找到了评论，但它不是评论本身的参考。

在此先感谢，我想我只需要重新考虑如何使用 firestore 构建我的数据库？

const addLikeToComment = async (
  postID: string,
  commentID: string,
  userID: string
): Promise<void> => {
  const currentPost = await getPostById(postID)
  const currentPostDocId = currentPost[0].docID!
  const currentPostRef = doc(db, 'posts', currentPostDocId)

  const commentToAddLikeTo = currentPost[0].comments.find(
    (currComment) => currComment.commentID === commentID
  )
  console.log(commentToAddLikeTo)
  if (!commentToAddLikeTo?.likes.includes(userID)) {
    await updateDoc(currentPostRef, {
        // add the like to comments - currentComment - likes array inside it push the userID
    })
  } else {
    await updateDoc(currentPostRef, {
        // remove the like
    })
  }
}

Answer 1

const addLikeToComment = async (
postID: string,
commentID: string,
userID: string
): Promise<void> => {
const currentPost = await getPostById(postID)
const currentPostDocId = currentPost[0].docID!
const currentPostRef = doc(db, 'posts', currentPostDocId)
const commentToAddLikeTo = currentPost[0].comments.find(
    (currComment) => currComment.commentID === commentID
)
const newLikes = commentToAddLikeTo?.likes

if (!commentToAddLikeTo?.likes.includes(userID)) {
    newLikes?.push(userID)
} else {
    const indexOfUserID = newLikes?.indexOf(userID)
    newLikes?.splice(indexOfUserID!, 1)
}

await updateDoc(currentPostRef, {
    ...currentPost[0],
    likes: newLikes,
})

}

这就是我在同事的帮助下解决这个问题的方法。 基本上我是直接操作 likes 数组，然后更新整个帖子信息。