Angularfire: Noob Question. object.valueChanges vs object.snapshotChanges

[Hanzofm]

Hi. Sorry about this question but.

After read the docs, Someone could explain for dummies the difference between .valueChanges and .snapshotChanges()?

Thanks

[randelllamontgroup]

You would use .snapshotChanges() whenever you want to get the metadata of a doc (e.g. DocumentID) and .valueChanges() when you need the data within the doc. You can't get document data from .snapshotChanges().

https://stackoverflow.com/questions/48608769/what-is-snapshotchanges-in-firestore

[nickreynke]

Plus: The newest version of AngularFire allows you to use valueChanges() in a way that it also maps the ID of the document to the document data that is being returned in addition to the document data itself.

const tasks: Observable<Task[]> = this.firestore.collection<Task>('tasks').valueChanges({ idField: 'id' });

[chrisjaimes]

thaanks! @nickreynke where in the docs did you see that?

[nickreynke]

@chrisjaimes it was implemented with this PR https://github.com/angular/angularfire2/pull/1976 :)

[newmesiss]

Usaría .snapshotChanges () siempre que desee obtener los metadatos de un documento (por ejemplo, DocumentID) y .valueChanges () cuando necesite los datos dentro del documento. No puede obtener datos del documento de .snapshotChanges ().

https://stackoverflow.com/questions/48608769/what-is-snapshotchanges-in-firestore

if I use snapshotChanges () is it counted as a call to the document?