我正在制作一个Polymer web组件，用于使用Geofire的查询。我在一个单独的应用程序中成功使用它们（使用js），但在测试组件时，查询不会触发任何事件。 Firebase数据库确实包含数据。
以下是相关代码，这是 demo 。
<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="scripts.html">
<link rel="import" href="geofire-elements-behavior.html">
<!--
`geofire-query`
An element for working with GeoFire's [`GeoQuery`](https://github.com/firebase/geofire-js/blob/master/docs/reference.md#geoquery)s.
@polymerBehavior GeofireElementsBehavior
@demo demo/index.html
-->
<dom-module id="geofire-query">
<template>
<style>
:host {
/*display: block;*/
}
</style>
</template>
<script>
Polymer({
is: 'geofire-query',
properties: {
/**
* The latitude for the query's center.
*/
lat: Number,
/**
* The longitude for the query's center.
*/
lng: Number,
/**
* The radius in kilometers around the query's center.
*/
radius: Number,
/**
* Whether the query is active and listening for GeoQuery events.
*/
idle: {
type: Boolean,
value: false,
reflectToAttribute: true,
// observer: '_idleChanged'
},
/**
* An array managed by the GeoQuery events.
* Each element is an object with properties `key, lat, lng, location, distance`.
*/
resultsArray: {
type: Array,
notify: true
},
/**
* An object managed by the GeoQuery events.
* It is a map of key => {`lat, lng, location, distance`}.
*/
resultsObject: {
type: Object,
notify: true
}
},
observers: [
'_idleChanged(idle, _query)',
'_queryChanged(lat, lng, radius)'
],
behaviors: [
GeofireElementsBehavior
],
_idleChanged: function(idle, query) {
if (!query) return;
console.log('we have a query', query.center(), query.radius(), idle, query, 'app=', this.app);
if (!idle) {
this.resultsArray = [];
this.resultsObject = {};
console.log('setting listeners...');
this.onKeyEnteredRegistration = query.on('key_entered', function(key, location, distance) {
console.log('key-entered', key, location, distance);
this.resultsObject[key] = {
lat: location[0],
lng: location[1],
location: location,
distance: distance
};
var data = {
key: key,
lat: location[0],
lng: location[1],
location: location,
distance: distance
};
this.resultsArray.push(data);
this.fire('key-entered', data);
}.bind(this));
this.onKeyExitedRegistration = query.on("key_exited", function(key, location, distance) {
this.resultsObject[key] = null;
for (var i = 0; i < this.resultsArray.length; i++) {
if (this.resultsArray[i].key == key) {
this.resultsArray.splice(i, 1);
break;
}
}
this.fire('key-exited', {
key: key,
lat: location[0],
lng: location[1],
location: location,
distance: distance
});
}.bind(this));
this.onKeyMovedRegistration = query.on("key_moved", function(key, location, distance) {
this.resultsObject[key] = {
lat: location[0],
lng: location[1],
location: location,
distance: distance
};
var data = {
key: key,
lat: location[0],
lng: location[1],
location: location,
distance: distance
};
for (var i = 0; i < this.resultsArray.length; i++) {
if (this.resultsArray[i].key == key) {
this.resultsArray[i] = data;
break;
}
}
this.fire('key-moved', data);
}.bind(this));
this.onReadyRegistration = query.on("ready", function() {
console.log('ready');
this.fire('ready');
}.bind(this));
} else {
query.cancel();
query = null;
console.log('set query to null?', this._query === null);
}
},
_queryChanged: function(lat, lng, radius) {
if ((lat || lat === 0) && (lng || lng === 0) && radius) {
console.log('querying [', lat, lng, ']', radius, 'km');
var criteria = {
center: [lat, lng],
radius: radius
};
if (this._query) {
this._query.updateCriteria(criteria);
} else {
this._query = this._geofire.query(criteria);
}
}
}
/**
* Corresponds to the GeoQuery's `key_entered` event. Fires after updating the internal results.
* @event key-entered
* @param {key} string The location's identifier.
* @param {lat} number Latitude.
* @param {lng} number Longitude.
* @param {location} array [lat, lng] shorthand.
* @param {distance} number Distance from the query's center, in kilometers.
*/
/**
* Corresponds to the GeoQuery's `key_exited` event. Fires after updating the internal results.
* @event key-exited
* @param {key} string The location's identifier.
* @param {lat} number Latitude.
* @param {lng} number Longitude.
* @param {location} array [lat, lng].
* @param {distance} number Distance from the query's center, in kilometers.
*/
/**
* Corresponds to the GeoQuery's `key_moved` event. Fires after updating the internal results.
* @event key-moved
* @param {key} string The location's identifier.
* @param {lat} number Latitude.
* @param {lng} number Longitude.
* @param {location} array [lat, lng].
* @param {distance} number Distance from the query's center, in kilometers.
*/
/**
* Corresponds to the GeoQuery's `ready` event. Fired when the initial result set of the query is ready.
* @event ready
*/
});
</script>
</dom-module>
geofire-elements-behavior.html
<script>
/**
* @polymerBehavior
*/
GeofireElementsBehavior = {
properties: {
/**
* The Firebase app's name. If not specified, the default Firebase app will be used.
*/
app: String,
/**
* The path to this geofire's data inside the Firebase database.
*/
path: String
},
// observers: [
// '_geofireChanged(app, path)'
// ],
//
// _geofireChanged: function(app, path) {
// this._geofire = new GeoFire(firebase.app(app).database().ref(path));
// },
/**
* The [GeoFire](https://github.com/firebase/geofire-js/blob/master/docs/reference.md#geofire) instance.
*/
get _geofire() {
if (!this.geofireInstance) {
console.log('init geofire. app=', this.app, 'path=', this.path);
this.geofireInstance = new GeoFire(firebase.app(this.app).database().ref(this.path));
}
return this.geofireInstance;
}
};
</script>
答案 0 :(得分：0)
这是一个愚蠢的规则错误:(
我有
{
"rules": {
"geofire1": {
"$key": {
".read": "true",
".write": "true"
}
}
}
}
但我需要
{
"rules": {
"geofire1": {
".read": "true",
".indexOn": "g",
"$key": {
".write": "true"
}
}
}
}