如何使用 flutter 打印 firebase 文档参考屏幕

Question

I would like to know how to print a Firebase document reference to phone7tablet screen using flutter I have tried this so far:

StreamBuilder<QuerySnapshot>(stream: stations,builder: (BuildContext context,
                    AsyncSnapshot<QuerySnapshot> snapshot){
                  if(snapshot.hasError){
                    return SnackBar(content: Text("Something went wrong"));
                  }
                  if(snapshot.connectionState == ConnectionState.waiting){
                    return SnackBar(content: Text("Loading"));
                  }
                  final data = snapshot.requireData;

                  return ListView.builder(
                    itemCount: data.size,
                    itemBuilder: (context, index){
                      var ref = data.docs[index]["ref"].toString();
                      return Text(ref);

                    },

Heres a screenshot of my database :

To be more elaborate I want to print contents of the document that is being linked by "ref" variable.

inside the test collection there are two fields:

1. name (a string field)
2. age (an integer field)

Heres my code output:

Answer 1

Your ref field seems to be a reference to another document. The linked document is not automatically loaded, but instead returned as a DocumentReference object .

To load the linked document, wrap it in a FutureBuilder and call data.docs[index]["ref"].get() as the future, as shown in the FlutterFire documentation onreading a document once .