Merge pull request #23 from jlara310/firestore_query_subcollection

docs:  add snippet for a subcollection query

Author: nohe427

packages/firebase_snippets_app/lib/snippets/firestore.dart

@@ -34,6 +34,7 @@ class FirestoreSnippets extends DocSnippet {
     getStarted_readData();
     dataModel_references();
     dataModel_subCollections();
+    getDataOnce_getAllDocumentsInASubcollection();
   }
 
   void getStarted_addData() async {
@@ -453,31 +454,47 @@ class FirestoreSnippets extends DocSnippet {
   void getDataOnce_multipleDocumentsFromACollection() {
     // [START get_data_once_multiple_documents_from_a_collection]
     db.collection("cities").where("capital", isEqualTo: true).get().then(
-          (querySnapshot) {
-            print("Successfully completed");
-            for (var docSnapshot in querySnapshot.docs) {
-              print('${docSnapshot.id} => ${docSnapshot.data()}');
-            }
-          },
-          onError: (e) => print("Error completing: $e"),
-        );
+      (querySnapshot) {
+        print("Successfully completed");
+        for (var docSnapshot in querySnapshot.docs) {
+          print('${docSnapshot.id} => ${docSnapshot.data()}');
+        }
+      },
+      onError: (e) => print("Error completing: $e"),
+    );
     // [END get_data_once_multiple_documents_from_a_collection]
   }
 
   void getDataOnce_getAllDocumentsInACollection() {
     // [START get_data_once_get_all_documents_in_a_collection]
     db.collection("cities").get().then(
-          (querySnapshot) {
-            print("Successfully completed");
-            for (var docSnapshot in querySnapshot.docs) {
-              print('${docSnapshot.id} => ${docSnapshot.data()}');
-            }
-          },
-          onError: (e) => print("Error completing: $e"),
-        );
+      (querySnapshot) {
+        print("Successfully completed");
+        for (var docSnapshot in querySnapshot.docs) {
+          print('${docSnapshot.id} => ${docSnapshot.data()}');
+        }
+      },
+      onError: (e) => print("Error completing: $e"),
+    );
     // [END get_data_once_get_all_documents_in_a_collection]
   }
 
+  void getDataOnce_getAllDocumentsInASubcollection() {
+    // [START get_data_once_get_all_documents_in_a_subcollection]
+    // [START firestore_query_subcollection]
+    db.collection("cities").doc("SF").collection("landmarks").get().then(
+      (querySnapshot) {
+        print("Successfully completed");
+        for (var docSnapshot in querySnapshot.docs) {
+          print('${docSnapshot.id} => ${docSnapshot.data()}');
+        }
+      },
+      onError: (e) => print("Error completing: $e"),
+    );
+    // [END firestore_query_subcollection]
+    // [END get_data_once_get_all_documents_in_a_subcollection]
+  }
+
   void getDataOnce_listSubCollections() {
     // [START get_data_once_list_sub_collections]
     // Not currently available in Dart SDK
@@ -807,27 +824,20 @@ class FirestoreSnippets extends DocSnippet {
   void aggregationQuery_count() {
     // [START count_aggregate_collection]
     // Returns number of documents in users collection
-    db
-      .collection("users")
-      .count()
-      .then(
-        (res) => print(res.data().count), 
-        onError: (e) => print("Error completing: $e"),
-      );
+    db.collection("users").count().then(
+          (res) => print(res.data().count),
+          onError: (e) => print("Error completing: $e"),
+        );
     // [END count_aggregate_collection]
   }
 
   void aggregationQuery_count2() {
     // [START count_aggregate_query]
     // This also works with collectionGroup queries.
-    db
-      .collection("users")
-      .where("age", isGreaterThan: 10)
-      .count()
-      .then(
-        (res) => print(res.data().count), 
-        onError: (e) => print("Error completing: $e"),
-      );
+    db.collection("users").where("age", isGreaterThan: 10).count().then(
+          (res) => print(res.data().count),
+          onError: (e) => print("Error completing: $e"),
+        );
     // [END count_aggregate_query]
   }
 

packages/firebase_snippets_app/pubspec.yaml

@@ -23,35 +23,35 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  firebase_core: ^1.12.0
-  cloud_firestore: ^3.1.8
+  firebase_core: ^2.12.0
+  cloud_firestore: ^4.7.0
   cloud_firestore_odm: ^1.0.0-dev.11
-  cloud_functions: ^3.2.10
-  firebase_remote_config: ^2.0.2
-  firebase_analytics: ^9.1.2
-  firebase_storage: ^10.2.9
-  firebase_messaging: ^11.2.11
-  firebase_dynamic_links: ^4.1.2
-  firebase_ml_model_downloader: ^0.1.0+9
-  firebase_auth: ^3.3.12
+  cloud_functions: ^4.3.0
+  firebase_remote_config: ^4.2.0
+  firebase_analytics: ^10.4.0
+  firebase_storage: ^11.2.0
+  firebase_messaging: ^14.6.0
+  firebase_dynamic_links: ^5.3.0
+  firebase_ml_model_downloader: ^0.2.3
+  firebase_auth: ^4.6.0
   path_provider: ^2.0.9
-  firebase_database: ^9.0.9
-  firebase_performance: ^0.8.0+8
+  firebase_database: ^10.2.0
+  firebase_performance: ^0.9.2
   json_annotation: ^4.4.0
-  google_sign_in: ^5.2.4
-  flutter_facebook_auth: ^4.1.2
+  google_sign_in: ^6.1.0
+  flutter_facebook_auth: ^5.0.11
   github_sign_in: ^0.0.4
   twitter_login: ^4.1.0
-  sign_in_with_apple: ^3.3.0
+  sign_in_with_apple: ^4.3.0
   crypto: ^3.0.1
-  firebase_crashlytics: ^2.6.2
+  firebase_crashlytics: ^3.3.0
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
   integration_test:
     sdk: flutter
-  flutter_lints: ^1.0.0
+  flutter_lints: ^2.0.1
   build_runner: ^2.1.8
   cloud_firestore_odm_generator: ^1.0.0-dev.11
   json_serializable: ^6.1.5