Count data
You can use the count
prefilter to count the values of your collection.
Note that the usage of the prefilter types
Take
, Skip
, Select
, Count
, First
and Last
will require the collection data to always get queried from the database on every change. Keep that in mind when creating performance critical tasks.
\f:(typescript:Angular) export class DemoComponent implements OnInit {\n \tvalues$: Observable<number>;\n \tconstructor(private db: SapphireDbService) { }\n\n \tngOnInit() {\n \t\tthis.values$ = this.db.collection<Entry>('entries')\n \t\t\t.count()\n \t\t\t.values();\n \t}\n }
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