我正在使用 firebase firestore (flutter) dart

Question

i want to get user type field from firestore to route the user to either (Store owner page ) or (Customer page )?

I want to get the value to decide which page the user should see

Answer 1

you're trying to get the userType field directly from the DocumentSnapshot , which will return null , you need to get data of field from the Map<String, dynamic> which is returned from data() , so you need to change:

userType = documentSnapshot['userType'];

with this:

userType = (documentSnapshot.data() as Map<String, dynamic>)['userType'];

this will save the value of userType field in the userType variable.