英文:
What does the TypeError: _n6.split is not a function (it is undefined) mean?
问题
我尝试过并调试了不同的方法，得出了这是问题的结论
const artistsCollectionRef = collection(db, "Artists");
onSnapshot(artistsCollectionRef, (snapshot) => {
snapshot.docChanges().forEach((change) => {
const updatedData = change.doc.data();
const eventId = updatedData.Events;
const eventRef = doc(db, "Events", eventId);if (change.type === "modified") {updateDoc(eventRef, {Artist: updatedData.Name,});}});
});
我正在使用 Firebase V10 和 Expo，如果这不是有帮助的话，对不起，这是我第一次在Stackoverflow上发帖。我试图让当一个Firebase文档中的数据发生变化时，另一个文档中的数据也会发生变化，我还有更多的代码，但这段代码是问题所在。我正在使用useSnapshot来检查艺术家文档中是否发生了变化，然后它需要检查发生了什么变化，并根据变化更新事件文档。```<details><summary>英文:</summary>I have tried and debugged different things and came to the conclusion that this is the problem```const artistsCollectionRef = collection(db, "Artists");onSnapshot(artistsCollectionRef, (snapshot) => {snapshot.docChanges().forEach((change) => {const updatedData = change.doc.data();const eventId = updatedData.Events;const eventRef = doc(db, "Events", eventId);if (change.type === "modified") {updateDoc(eventRef, {Artist: updatedData.Name,});}});});
I'm using Firebase V10 and Expo, sorry if this isn't helpful it's my first time posing on Stackoverflow.
I tried to make it so that when data changes in one Firebase document it also changes in another document, I have more code for this but this code is the problem. I'm using useSnapshot to check when a change is made in the artists document, then it needs to check what changed and update the event document based off of what changed
答案1
得分: 0
对eventRef变量存在问题，我无法确定问题出在哪里，因为它已经被定义了。但是我成功地通过以下方式解决了它：
const updatedData = change.doc.data();const eventIds = updatedData.Events;if (change.type === "modified") {for (const eventId of eventIds) {const eventRef = doc(db, "Events", eventId);await updateDoc(eventRef, {Artist: updatedData.Name,});}}
英文:
There was an issue with the eventRef variable, I can't figure out what it was because it was defined. But i managed to work around it by doing this:
const updatedData = change.doc.data();const eventIds = updatedData.Events;if (change.type === "modified") {for (const eventId of eventIds) {const eventRef = doc(db, "Events", eventId);await updateDoc(eventRef, {Artist: updatedData.Name,});}}
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