从firebase获取javascript的多个数据数据

Question

如何从酒店获取所有数据，无法将数据打印到控制台，以便能够以这种方式打印数据

“nombre，rfc，infGen，ubicacion”

Answer 1

如果实时参考语法让你失望，你也可以使用Firebase REST API。使用AJAX库（我将使用axios作为示例），您可以轻松地从数据库中读取数据。

以下是有关如何从Firebase读取数据的一些示例。

// This first call will return the root of your database
// By appending the url with '.json', the response will be JSON
axios('https://**your-database-here**.firebaseio.com/.json')
.then(response => {
  // Using .then to access the resolved data from the promise
  // "response" itself is an object, but our data is assigned to the data property
  console.log(response.data);
});

// This call will return a single collection, such as the Hotel collection. 
// Be aware that firebase does not return array, but instead returns an object of key - value pairs
axios('https://**your-database-here**.firebaseio.com/Hotel.json')
.then(response => {
  console.log(response.data);

  var hotel = response.data; // Again, just wait the actual data
  // Will need to loop over object to get nested data here
});

<script src="https://unpkg.com/axios/dist/axios.min.js"></script>

Answer 2

foreach是需要的操作，这个逐个获取数据

var query = firebase.database().ref("Hotel/"+usuario.uid);
        query.once("value")
          .then(function(snapshot) {
            snapshot.forEach(function(childSnapshot) {
              var hrfc = childSnapshot.val().RFC;
              var hnombre = childSnapshot.val().nombre;
              var hinfo = childSnapshot.val().infoGen;
              var hubic = childSnapshot.val().ubicacion;


          });
        });

}