67 lines
1.8 KiB
Dart
67 lines
1.8 KiB
Dart
import 'dart:math';
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import 'package:fl_query/fl_query.dart';
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import 'package:flutter/material.dart';
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final queryVariableKeyJob = QueryJob.withVariableKey<String, void>(
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preQueryKey: "variable-query",
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task: (queryKey, externalData) {
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return Future.delayed(
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const Duration(milliseconds: 500),
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() => "QueryKey:${queryKey.split("#").last}",
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);
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},
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);
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class QueryVariableKeyExample extends StatefulWidget {
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const QueryVariableKeyExample({Key? key}) : super(key: key);
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@override
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State<QueryVariableKeyExample> createState() =>
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_QueryVariableKeyExampleState();
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}
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class _QueryVariableKeyExampleState extends State<QueryVariableKeyExample> {
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late double id;
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@override
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void initState() {
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super.initState();
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id = Random().nextDouble() * 200;
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}
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@override
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Widget build(BuildContext context) {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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"# Query Variable Example",
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style: Theme.of(context).textTheme.headline5,
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),
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QueryBuilder<String, void>(
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job: queryVariableKeyJob(id.toString()),
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externalData: null,
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builder: (context, query) {
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if (query.isLoading || query.isRefetching || !query.hasData) {
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return const CircularProgressIndicator();
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}
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return Row(
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children: [
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Text("Query Result: ${query.data}"),
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ElevatedButton(
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child: const Text("New Id"),
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onPressed: () {
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setState(() {
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id = Random().nextDouble() * 200;
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});
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},
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),
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],
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);
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},
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),
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],
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);
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}
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}
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