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Usage of useUser with useFirestoreDocData not very compatible within custom hooks

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#423 4 則留言 5 個 reaction 已指派 0 人 在 GitHub 檢視

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評估

難度
5/5
預估耗時
一週以上
新手友好度
25/100
Issue 類型
功能
描述清晰度
需要釐清
活躍度
停滯
技術堆疊
firebase, react, typescript

研究方向

先追蹤 useUser、useFirestore 和 useFirestoreDocData 這些進入點,並使用 issue 中顯示的自訂 hook 重現 null-user 路徑。將回報的 ReactFire v4 行為與 issue 249 中參照的 ReactFire v3 行為進行比較;該 issue 未指出檔案、測試或具體的完成條件。

由索引模型根據 Issue 內容生成。

描述

v5
Version info

React: 18 experimental

Firebase: 9

ReactFire: 4

Other (e.g. Node, browser, operating system) (if applicable):

Test case
Steps to reproduce
const useMyHook= () => {
    
    const firestore = useFirestore();
    const {data: user} = useUser();   
    const ref = user && doc(firestore, "users", user.uid);
    const {data: userData} = useFirestoreDocData(ref);

    return userData;
}
Behavior

Since useUser is returning the type User | null , we need to check, if the user is available. But in the case when the user is null, useFirestoreDocData cannot be called, since the ref would not exist. In react we are not allowed to write:
const {data: userData} = ref && useFirestoreDocData(ref)

One way to get around this issue is by passing in the user as a prop, but it does not seem to be convenient, if one wants to use this hook within another hook. We would just push the issue upwards until we reach a component that is again wrapped by a component that knows if the user exists:

  • component that checks if user exists (like deprecated AuthCheck)
  • component that is rendered when user exists
  • hook that is called within that component

Another alternative for typescript is writing user! with exclamation mark, but this does not feel proper.

I hope the case is clear and you might know a better way to deal with it.
I think with react-fire v3 (fb v8) I wasn't experiencing this issue. Since it was probably solved with this issue: https://github.com/FirebaseExtended/reactfire/issues/249

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環境準備

從這裡開始

  1. 先讀完整個 Issue,再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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