Firebase-数据库中的update（）值

Question

I'm trying to update() a value inside of my firebase database, but I'm struggling.

I first did:

  this.database.list('/replies/'+this.postData.parent+'/'+this.postData.id).update('score', this.voteCount)

Thinking that would work, but I got an error:

ERROR Error: Reference.update failed: First argument must be an object containing the children to replace.

I then tried:

this.database.list('/replies/'+this.postData.parent+'/'+this.postData.id).update({'score': this.voteCount})

with this.voteCount being an integer.

and I got the following error:

ERROR Error: Expects a string, snapshot, or reference. Got: object

I'm really confused as to why it's first asking for an object and then later tells me it doesn't want an object..

If I change update() to set() and keep it as ('score', this.voteCount) it works fine, but I don't want to set it, I want to update it if it exists..

Am I doing something wrong? Thank you!

Answer 1

尝试：

this.database.ref('/replies/'+this.postData.parent+'/'+this.postData.id).update({'score': this.voteCount})