Flutter，未为类型“Object”定义方法“containsKey”

Question

documentSnapshot.data().containsKey("fieldName")

I updated Flutter from 2.23 to 2.8

and suddenly red line occurs

and the error message is

The method 'containsKey' isn't defined for the type 'Object'.

There is a red line under containsKey How to solve this?

Answer 1

Had the same issue, convert to the type of the data works.

 final docData = docSnapshot.data() as Map<String, dynamic>;
 if (docSnapshot.exists && !docData.containsKey('labels')) {
     return;
 }