Depended queries support added

packages/example/lib/dependent_query_example.dart

@@ -0,0 +1,36 @@
+import 'package:example/main.dart';
+import 'package:fl_query/fl_query.dart';
+import 'package:flutter/material.dart';
+
+final dependentQueryJob = QueryJob<String, void>(
+    queryKey: "dependent-query-job",
+    task: (queryKey, externalData, query) {
+      final successQuery =
+          query.dependOnQuery<String, void>(successJob, externalData: null);
+      final failedQuery =
+          query.dependOnQuery<String, void>(failedJob, externalData: null);
+      if (failedQuery.hasError) return failedQuery.error.toString();
+      if (successQuery.hasData) return successQuery.data!;
+      return "No data from success query yet";
+    });
+
+class DependentQueryExample extends StatelessWidget {
+  const DependentQueryExample({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(),
+      body: QueryBuilder<String, void>(
+        job: dependentQueryJob,
+        externalData: null,
+        builder: (context, query) {
+          if (query.isLoading || query.isRefetching || !query.hasData) {
+            return const CircularProgressIndicator();
+          }
+          return Text(query.data!);
+        },
+      ),
+    );
+  }
+}

packages/example/lib/lazy_query.dart

@@ -4,7 +4,7 @@ import 'package:flutter/material.dart';
 final lazyQueryJob = QueryJob<String, String>(
     queryKey: "non_enabled_query",
     enabled: false,
-    task: (queryKey, data) {
+    task: (queryKey, data, _) {
       return Future.delayed(const Duration(milliseconds: 500),
           () => "Hello from $queryKey with $data");
     });

packages/example/lib/main.dart

@@ -1,6 +1,7 @@
 import 'dart:math';
 
 import 'package:example/another_component.dart';
+import 'package:example/dependent_query_example.dart';
 import 'package:example/hooks_example.dart';
 import 'package:example/lazy_query.dart';
 import 'package:example/mutation_example.dart';
@@ -34,13 +35,13 @@ class MyApp extends StatelessWidget {
 
 final successJob = QueryJob<String, void>(
   queryKey: "greetings",
-  task: (queryKey, _) => Future.delayed(const Duration(seconds: 2),
+  task: (queryKey, _, __) => Future.delayed(const Duration(seconds: 2),
       () => "Welcome ($queryKey) ${Random.secure().nextInt(100)}"),
 );
 
 final failedJob = QueryJob<String, void>(
   queryKey: "failure",
-  task: (queryKey, _) => Random().nextBool()
+  task: (queryKey, _, __) => Random().nextBool()
       ? Future.error("[$queryKey] Failed for unknown reason")
       : Future.value(
           "Success, you'll get slowly ${Random().nextInt(100)}!",
@@ -178,6 +179,16 @@ class _MyHomePageState extends State<MyHomePage> with WidgetsBindingObserver {
               );
             },
           ),
+          ElevatedButton(
+            child: const Text("Dependent Query Example"),
+            onPressed: () {
+              Navigator.of(context).push(
+                MaterialPageRoute(
+                  builder: (context) => const DependentQueryExample(),
+                ),
+              );
+            },
+          ),
           const AnotherComponent(),
         ],
       ),

packages/example/lib/query_with_external_data.dart

@@ -6,7 +6,7 @@ import 'package:flutter/material.dart';
 final jobWithExternalData = QueryJob<String, String>(
     queryKey: "external_data",
     cacheTime: const Duration(seconds: 10),
-    task: (queryKey, data) {
+    task: (queryKey, data, _) {
       return Future.delayed(const Duration(milliseconds: 500),
           () => "Hello from $queryKey with $data");
     });