Flutter firestore overwrites data when I use set data

Question

I have been trying to add data to sections in my firestorm database, I have a collection -> document -> data fields. Whenever I use setData({'key': 'value'}) is always overwrites the data already in the document. Is there anyway around this?

Answer 1

That is because what setData(object) is used for

To create or overwrite a single document

While update(object)

To update some fields of a document without overwriting the entire document

So what you need is to use update()