Issue
I am trying to check if user user input data exists in firebase when user presses this button.
if it's exist go to signUp
This is the button
onPressed: () {
setState(() {
if (studentId == null){
//error message
}else {
_firebase
.collection("university_ids")
.doc(studentId)
.get()
.then((doc) {
if (doc.exists) {
setState(() {
isExists = true;
});
} else {
setState(() {
isExists = false;
});
}
});
if (isExists) {
Navigator.pushNamed(
context, 'sign_up_screen');
}
This is the Text field
onChange: (value) {
setState(() {
studentId= value;
});
},
Solution
You dont seem like you would be needing a setState
call at all.
Just use an async
function for the onPressed
callback and use await
to get your data asynchronously.
onPressed: () async {
if (studentId == null) { //error message }
else {
var doc = await _firebase.collection("university_ids").doc(studentId).get();
if (doc.exists) Navigator.pushNamed(context, 'sign_up_screen');
}
}
Answered By - Nisanth Reddy
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