将所有数组对象(Firestore 时间戳)转换为日期

Question

我正在使用firestore和react-native-gifted-chat，我正在尝试将所有聊天消息从firestore发送到聊天。但是，天才聊天不支持显示火力基准时间戳。它将显示无效的日期。因此，我正在尝试转换所有日期对象。

async _getMessage() {
const messColRef = db.collection('Message').doc(this.state.roomName).collection('message').orderBy('createdAt', 'desc').limit(9)
const initialQuery = messColRef
const documentSnapshots = await initialQuery.get()
const documentData = documentSnapshots.docs.map(document => ({
id: document.id, ...document.data()
}));
const lastVisible = documentData[documentData.length - 1]
const finalData = _.forEach(documentData['createdAt'], (item) => {
return item.toDate()
});
console.log(documentData)
}

这就是我的数据的样子：

{
"_id": "f0feb0b6-c0f9-4735-a93d-4297872a4840",
"createdAt": Timestamp {
"nanoseconds": 382000000,
"seconds": 1568995812,
},
"id": "Uw6PNNsf7aqWrxcgSDSi",
"text": "Hi",
"user": {
"_id": "V8h2iSllhPXSr8sTGP0yHiaYZwx1",
"avatar": "https://firebasestorage.googleapis.com/v0/b/exit-3684f.appspot.com/o/add- 
user.png ? alt = media & token=395c8beb - 47a3 - 4ae6 - a0a1 - fe901e7ad42f",
"name": "This is the username",
},
},
{
"_id": "cc298d96-f19a-4ec7-bdf7-3767d900a364",
"createdAt": Timestamp {
"nanoseconds": 373000000,
"seconds": 1568995733,
},
"id": "WzbOA52Y3qukvPUIXRLB",
"text": "hello",
"user": {
"_id": "V8h2iSllhPXSr8sTGP0yHiaYZwx1",
"avatar": "https://firebasestorage.googleapis.com/v0/b/exit-3684f.appspot.com/o/add- 
user.png ? alt = media & token=395c8beb - 47a3 - 4ae6 - a0a1 - fe901e7ad42f",
"name": "This is the username",
},
},

所以我的目标是将所有createdAt转换为JS时间日期

Answer 1

很抱歉没有深入探索，在查看@Spatz评论后，我想出了该怎么做

documentData.forEach(a => {
var date = a.createdAt.toDate()
data.push({
_id: a._id,
createdAt: date,
id: a.id,
text: a.text,
user: a.user
})
})

Answer 2

使用天才聊天的 renderTime 道具，并传递一个转换时间并以字符串形式返回该时间的函数。