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How to check two firestore collection in flutter application?

enter image description here I want to check 2 collections(students & teacher) and login into this user if this record exists. Please help me...

You can create two references:

final reference1 =  Firestore.instance.collection("collection1");
final reference2 =  Firestore.instance.collection("collection2");

then you can query in these collection:

final result1 = await reference1.where("key", isEqualTo: value).get()
final result2 = await reference2.where("key", isEqualTo: value).get()

then according to your result, you can log in your user.

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