I need to retrieve data from Firestore to get "petName" of each document and then I used in dropdownbutton. But problem is that I am not getting any field . I received only documents. As also show in output dropdownbutton.

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CodePudding user response：

you are using document you have to specify what exactly like as in your case you want petName so use that instead of using the whole document.

try:

snap.data()['petName']