问题:如何在不重新查询先前检索(和绑定)的结果的情况下向我绑定的Firestore VuexFire参考添加分页(无限滚动)?
背景: 我目前正在使用VuexFire Firestore绑定为我的Vuex存储中的大多数更新帖子填充时间线,例如:
int TelegramApiId = 123456;
string TelegramApiHash = "abcdef";
TelegramClient TLClient = null;
async void SendMessage ( )
{
var store = new FileSessionStore ( );
this.TLClient = new TelegramClient ( this.TelegramApiId, this.TelegramApiHash, store );
await this.TLClient.ConnectAsync ( );
}
这会将Firestore数据库中评分最高的30个帖子检索到vuex状态变量timelineResults。
要添加分页,我找到了一个非VuexFire的示例,如下所示: How to paginate or infinite scroll by number of items in firestore?
fillTimeLine: firebaseAction(
({ bindFirebaseRef }) => {
bindFirebaseRef(
'timelineResults',
db
.collection('POSTS')
.orderBy('combined_vote_score', 'desc')
.limit(30)
)
})
是否可以将两个示例结合起来并将结果附加到绑定的引用上?
答案 0 :(得分:0)
您可以创建一个更通用的操作,如下所示:
bindRef: firestoreAction(({ bindFirestoreRef }, { name, ref }) => {
bindFirestoreRef(name, ref);
}),
然后像这样使用它:
this.bindRef({
name: 'timelineResults',
ref: db
.collection('POSTS')
.orderBy('combined_vote_score', 'desc')
.limit(30),
});
您可以根据需要更改参考。在这种情况下,当您检测到滚动限制时:
// lastVisible: using the array position from the previous binding
// since with vuex's binded data you cannot get the snapshots
this.bindRef({
name: 'timelineResults',
ref: db
.collection('POSTS')
.orderBy('combined_vote_score', 'desc')
.startAfter(lastVisible)
.limit(20),
});