我已经设置了一个控制器和服务来从我自己的NodeJS API / MongoDB端点获取一些JSON。
在我的浏览器控制台中，我看到一个返回的对象和5个项目，当我查询我的api时，我在浏览器中看到相同的json，所以我知道它在服务器端工作。
我很困惑，为什么在尝试NG-Repeat时，我在页面上什么都没有，当我在控制台注销退回的数据时，它返回未定义。
我是HTTP模块的新手，我正在尝试将DB调用重构为服务，而不是在控制器中使用它。
---控制器代码---
vm.getDepartments = function() {
vm.departments = DbService.getAllDepartments();
console.log(vm.departments);
}();
---服务代码（使用$ http）---
function getAllDepartments() {
$http.get('/api/departments').then(function(err, response) {
if (err) {
console.log(err);
}
return response;
});
};
--- html page ---
<tbody>
<tr ng-repeat='dept in vm.departments'>
<td>{{ dept.departmentLong }}</td>
<td>{{ dept.departmentShort }}</td>
<td>
<button class='btn btn-warning'><span class='glyphicon glyphicon-edit'></span></button>
<button class='btn btn-danger' ng-click='vm.deleteDepartment(dept);'><span class='glyphicon glyphicon-ban-circle'></span></button>
</td>
</tr>
</tbody>
答案 0 :(得分：3)
您使用了错误的private void syncDataItem(){
Log.d(TAG, "PanicAlert AlarmStatus=" + isAlertActive(context));
PutDataMapRequest putDataMapRequest = PutDataMapRequest.create(PATH_ALARM);
putDataMapRequest.getDataMap().putBoolean(FIELD_ALARM_ON, isAlertActive(context));
putDataMapRequest.setUrgent();
Wearable.DataApi.putDataItem(mGoogleApiClient, putDataMapRequest.asPutDataRequest()).await();
}
方法。
public class DataLayerListenerService extends WearableListenerService {
private static final String TAG = "DataLayerSample";
private static final String PATH_ALARM = "/alarm_path";
private static final String FIELD_ALARM_ON = "alarm_on";
@Override
public void onDataChanged(DataEventBuffer dataEvents) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onDataChanged: " + dataEvents);
}
GoogleApiClient googleApiClient = new GoogleApiClient.Builder(this)
.addApi(Wearable.API)
.build();
ConnectionResult connectionResult =
googleApiClient.blockingConnect(30, TimeUnit.SECONDS);
if (!connectionResult.isSuccess()) {
Log.e(TAG, "Failed to connect to GoogleApiClient.");
return;
}
for (DataEvent event : dataEvents) {
//Force update of complication? How?
}
}
方法有两个参数：@Override
public void onComplicationUpdate(
int complicationId, int dataType, ComplicationManager complicationManager) {
Log.d(TAG, "onComplicationUpdate() id: " + complicationId);
if (mGoogleApiClient == null){
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Wearable.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
mGoogleApiClient.connect();
}
int randomNumber = (int) Math.floor(Math.random() * 10);
String randomNumberText =
String.format(Locale.getDefault(), "%d!", randomNumber);
// Create Tap Action so that the user can trigger an update by tapping the complication.
Intent updateIntent =
new Intent(getApplicationContext(), UpdateComplicationDataService.class);
updateIntent.setAction(UpdateComplicationDataService.ACTION_UPDATE_COMPLICATION);
updateIntent.putExtra(UpdateComplicationDataService.EXTRA_COMPLICATION_ID, complicationId);
PendingIntent pendingIntent = PendingIntent.getService(
getApplicationContext(),
complicationId,
updateIntent,
0);
ComplicationData complicationData = null;
switch (dataType) {
case ComplicationData.TYPE_SHORT_TEXT:
complicationData = new ComplicationData.Builder(ComplicationData.TYPE_SHORT_TEXT)
.setShortText(ComplicationText.plainText(String.valueOf(actualState)))
.setTapAction(pendingIntent)
.build();
break;
if (complicationData != null) {
complicationManager.updateComplicationData(complicationId, complicationData);
}
//onStartWearableActivityClick();
}
和then回调，将使用then()对象调用。
使用success方法，将error函数附加到返回的response。
查看mine.
发布的旧答案 then()会返回承诺，因此您可以创建一个仅返回承诺的函数，如 @sachila ranawaka 所述。
callback在控制器中使用我上面提到的然后方法。
promise 另一种方法是创建$http.get('/api/departments')函数，并将其传递给function getAllDepartments() {
return $http.get('/api/departments')
};
方法。
DbService.getAllDepartments().then(function(response) {
vm.departments = response.data;
console.log(vm.departments);
},function(error){
console.log(err);
});
控制器代码：
callback