docs(firestore): Update add example to use set (#1539)

davideast · web-flow · commit c2df603c37c9 · 2018-03-30T12:17:40.000-06:00
diff --git a/docs/firestore/collections.md b/docs/firestore/collections.md
@@ -117,7 +117,7 @@ export class AppComponent {
     // Persist a document id
     const id = this.afs.createId();
     const item: Item = { id, name };
-    this.itemsCollection.add(item);
+    this.itemsCollection.doc(id).set(item);
   }
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -117,7 +117,7 @@ export class AppComponent {`
`117`	`117`	`// Persist a document id`
`118`	`118`	`const id = this.afs.createId();`
`119`	`119`	`const item: Item = { id, name };`
`120`		`- this.itemsCollection.add(item);`
	`120`	`+ this.itemsCollection.doc(id).set(item);`
`121`	`121`	`}`
`122`	`122`	`}`
`123`	`123`	```