当我尝试根据用户关注的不同用户 ID 整理帖子提要时，我遇到了以下错误。

Possible Unhandled Promise Rejection (id: 0): TypeError: undefined is not an object (evaluating 'snapshot.query.EP.path')

我正在使用 redux & firebase/firestore，错误发生在以下操作的第 581343114 行

export function fetchUsersFollowingPosts(uid) {
    return ((dispatch, getState) => {
        firebase.firestore()
            .collection("posts")
            .doc(uid)
            .collection("userPosts")
            .orderBy("creation", "asc")
            .get()
            .then((snapshot) => {
                const uid = snapshot.query.EP.path.segments[1];
                const user = getState().usersState.users.find(el => el.uid === uid);
                let posts = snapshot.docs.map(doc => {
                    const data = doc.data();
                    const id = doc.id;
                    return { id, ...data, user }
                })

                for(let i = 0; i< posts.length; i++){
                    dispatch(fetchUsersFollowingLikes(uid, posts[i].id))
                }
                dispatch({ type: USERS_POSTS_STATE_CHANGE, posts, uid })

            })
    })
}