如何更新 Firestore 中文档地图中现有的字段

Question

I've kinda figured out that we can update just one field inside the map of the document

Like here I can add one more field to courses key, like

Map<String, Object> nested = new HashMap(){};
nested.add("sample field inside courses");

and passing it to another like

Map<String, Object> courses = new HashMap(){};
courses.add();

Q. How can I update the value of abbreviation_color which is the last field in the above image?

Answer 1

Here's my test document:

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If I now want to update "Test2" I simply call...

yourDocumentReference.update("a.b2.c2", "New Value")

which results in this:

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Edit : It does not care if it contains spaces or not, if "b2" would be "b 2" you could easily call

yourDocumentReference.update("a.b 2.c2", "New Value")

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I hope I could help somebody!