before puting "!", I was getting this error:
The method '[]' can't be unconditionally invoked because the receiver can be 'null'.
This is my code:
FutureBuilder(
future: getCity(),
builder: ((context, snapshot) {
if (snapshot.hasData) {
var DocData = snapshot.data;
print(DocData);
return ListView.builder(itemBuilder: ((context, index) {
final String? title = DocData["Cities"];
return Text("testing");
}));
}
return Text('Loading...');
}))
],
),
),
),
);
}
Future getCity() async {
var doc = await FirebaseFirestore.instance
.collection('Listing')
.doc('City')
.get();
return doc.data();
}
and this is my firestore database structure:
Data I am getting on Print call:
{Cities: {Islamabad: [{Price: 100000, Title: Apartment}, {Price: 200000, Title: House}], Mirpur: [{Price: 300000, Title: House}]}}
I want to show this data in my listview builder
CodePudding user response:
use !
after checking null.
if (snapshot.hasData) {
var DocData = snapshot.data as Map?;
return ListView.builder(itemBuilder: ((context, index) {
final String? title = DocData?["Cities"];
return Text("testing ${title}");
}));