CODEWITHSUNDEEP
firebasefirebase-realtime-database
UmarZaii
UmarZaii

Reputation: 1351

Difference between setValue() and updateChildren()?

I have done research about setValue() and updateChildren(). I have tested both of them to add and update data from firebase database. From what I have learnt that both of them did the same exact thing and did some research about them.

From what I have learnt. The setValue() is used with a class object while updateChildren() is used with a Map or HashMap. Correct me if I'm wrong.

My question is as stated above, what is the difference between setValue() and updateChildren()?

Upvotes: 4

Views: 3160

Answers (2)

Candy Kane
Candy Kane

Reputation: 31

Using an example where your user has fields: Name, Birthday, Favourite Colour.

Set value requires you to set all the fields under the same parent node otherwise they are overwritten with no values and deleted. However, using updateChildValue, you can specify which field you would like to update without altering other fields. And, if the field doesn't already exist, it will create a new field. This is especially useful if you just want to add a new field under the user like hair colour.

Upvotes: 3

Artem Arkhipov
Artem Arkhipov

Reputation: 7455

'setValue' method is totally replacing the document (specified reference) with new data.

'updateChildren' method is just updating particular fields or add such fields if they did not exist before.

You often can get the same result using those methods, but actually they are different.

Upvotes: 8

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