问题
I am designing a web page that will obtain data from my firestore collection and display each document with its corresponding fields Here is the code:
<html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Stations</title>
<script src="https://www.gstatic.com/firebasejs/7.2.3/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.2.3/firebase-firestore.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin="anonymous"></script>
<script>
firebase.initializeApp({
apiKey: "XXXXXXXXXXXXX",
authDomain: "XXXXXXXXXXXXXX",
projectId: "XXXXXXXXXXX",
});
const db = firebase.firestore();
db.settings({ timestampsInSnapshots: true });
window.onload = function(){
db.collection('Nairobi').get().then((snapshot) => {
// var data = snapshot.data();
snapshot.forEach(function (child) {
var name_loc = child.id;
var loc = child.data().marker;
var forward = child.data().ForwardPower;
var reflected = child.data().ReflectedPower;
var ups = child.data().UPSError;
var upsDesc = child.data().UPSDesc;
var trans = child.data().TransmitterError;
var transDesc = child.data().TransDesc;
document.getElementById('station').innerHTML = name_loc;
document.getElementById('forward').innerHTML = 'Forward Power:' + forward;
})
})
}
</script>
</head>
<body>
<nav class="navbar navbar-dark bg-primary">
<a class="navbar-brand" href="#">Radio Africa</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent"
aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="./trialmap.php">Maps</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="./stations.php">Stations <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button"
data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</div>
</nav>
<div id="accordion">
<div class="card">
<div class="card-header" id="headingOne">
<h5 class="mb-0">
<button id="station" class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true"
aria-controls="collapseOne">
</button>
</h5>
</div>
<div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
<div class="card-body">
<p id="forward"> </p>
</div>
</div>
</div>
</div>
</body>
</html>
My firestore collection is structured as follows:
The idea is to get the name of the document and display it as the name for the button with id="station" and get Forwardpower and display it as well.
But on loading the page, only one document is displayed and there's no error in the console.
UPDATED PICTURE OF WEBPAGE
回答1:
you are replacing AN element content with a loop. The result will be shown only the last row.
It seem you are trying to make a list of it. Here's the example:
<!-- Consider your list in HTML -->
<div id="accordion"></div>
<script>
db.collection('Nairobi').get().then((s) => {
$("#station").html(""); // This will empty your station button
$("#station_box").html(""); // This will empty your station box
var n = 0;
s.forEach(function(x){
$("#accordion").append(`
<div class="card">
<div class="card-header" id="heading`+ n +`">
<h5 class="mb-0">
<button class="btn btn-link" data-toggle="collapse" data-target="#collapse`+ n+`">`+ x.id +`</button>
</h5>
</div>
<div id="collapse`+ n +`" class="collapse" data-parent="#accordion">
<div class="card-body">
<p>`+ x.data().ForwardPower +`</p>
</div>
</div>
</div>
`);
n += 1;
});
});
</script>
来源：https://stackoverflow.com/questions/58855519/how-can-i-display-all-data-from-firestore-documents-into-html-elements