Cannot check containsKey on DocumentSnapshot

Question

I'm trying to check if a field exists in my documentSnapshot.

My code:

document.data.containsKey('field_name')

But I'm getting:

error: The method 'containsKey' isn't defined for the type 'Function'.

Any suggestions?

user_13558035 · Answer

Try it like this:

(document.data() as Map).containsKey('field_name');

user_14414411 · Answer

Try accessing the data as a function, like this .data()