I'm making a page for posts that can be viewed by newest or most likes.
I manage this with drop-down lists and arrays.
And whenever the dropdown list is clicked, I have to force update this to match its value.
async selectPosts ({...} = {}, forceUpdate = false) {
let goodOrderByDir = 'desc'
let dateOrderByDir = 'desc'
const db = getFirestore()
let constraints = [ //This array determines the viewing order.
orderBy('date', dateOrderByDir), orderBy('good', goodOrderByDir)]
var hw = document.getElementById('dropDowmListID') //It is linked to a drop-down list.
hw.addEventListener('change', function() {
if (hw.value == 1) { //newest
constraints = [
orderBy('date', dateOrderByDir), orderBy('good', goodOrderByDir)]
}
if (hw.value == 2) { //most likes
constraints = [
orderBy('good', goodOrderByDir), orderBy('date', dateOrderByDir)]
}
})
if (forceUpdate) {
this._lastSelectPostsOptions = {}
}
constraints.push(limit(pageSize))
const queryRef = query(collection(db, 'posts'), ...constraints)
return Promise.all((await getDocs(queryRef)).docs.map(async item => {
this._lastSelectPostsDoc = item
const data = item.data()
return {
...data
}
}))
}
When doing a forced update, the default value is false in the current code.
async selectPosts ({...} = {}, forceUpdate = false)
So when I change the dropdown list I was told it must be true to get the next value.
So I changed the code like this
async selectPosts ({...} = {}, forceUpdate = true)
But I couldn't get the value I wanted...
How can I force an update to apply the changed array values?