dzod 0.2.0+1 
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Published 4 months ago • 
dart.nonstopio.com
dart.nonstopio.comA powerful Dart schema validation library inspired by Zod, providing type-safe validation, parsing, and inference with excellent developer experience.
import 'package:flutter/material.dart';
// Basic examples
import 'examples/basic/boolean_null_example.dart';
import 'examples/basic/number_validations_example.dart';
import 'examples/basic/string_validation_example.dart';
import 'examples/basic/user_schema_example.dart';
// Complex examples
import 'examples/complex/array_advanced_example.dart';
import 'examples/complex/enum_example.dart';
import 'examples/complex/object_manipulation_example.dart';
import 'examples/complex/record_example.dart';
import 'examples/complex/tuple_example.dart';
// Advanced examples
import 'examples/advanced/coercion_example.dart';
import 'examples/advanced/discriminated_union_example.dart';
import 'examples/advanced/pipeline_example.dart';
import 'examples/advanced/recursive_schema_example.dart';
// Async examples
import 'examples/async/api_validation_example.dart';
import 'examples/async/database_validation_example.dart';
// Error handling examples
import 'examples/error_handling/error_code_system_example.dart';
import 'examples/error_handling/error_formatting_example.dart';
// Schema composition examples
import 'examples/schema_composition/introspection_example.dart';
import 'examples/schema_composition/json_schema_generation_example.dart';
// Security examples
import 'examples/security/security_best_practices_example.dart';
// Real world examples
import 'examples/real_world/authentication_schema_example.dart';
class ExampleItem {
final String title;
final Widget widget;
final IconData icon;
const ExampleItem(this.title, this.widget, this.icon);
}
void main() {
runApp(const DzodExampleApp());
}
class DzodExampleApp extends StatelessWidget {
const DzodExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Dzod Validation Showcase',
theme: ThemeData(
useMaterial3: true,
colorScheme: ColorScheme.fromSeed(
seedColor: Colors.deepPurple,
brightness: Brightness.light,
),
),
darkTheme: ThemeData(
useMaterial3: true,
colorScheme: ColorScheme.fromSeed(
seedColor: Colors.deepPurple,
brightness: Brightness.dark,
),
),
home: const ValidationShowcasePage(),
);
}
}
class ValidationShowcasePage extends StatefulWidget {
const ValidationShowcasePage({super.key});
@override
State<ValidationShowcasePage> createState() => _ValidationShowcasePageState();
}
class _ValidationShowcasePageState extends State<ValidationShowcasePage> {
int _selectedIndex = 0;
String _selectedCategory = 'Basic';
final Map<String, List<ExampleItem>> _categorizedExamples = {
'Basic': [
const ExampleItem(
'Example 1: User Schema', UserSchemaExample(), Icons.person_outline),
const ExampleItem('Example 2: String Validations',
StringValidationExample(), Icons.text_fields),
const ExampleItem('Example 3: Number Validations',
NumberValidationsExample(), Icons.numbers),
const ExampleItem(
'Example 4: Boolean & Null', BooleanNullExample(), Icons.toggle_on),
],
'Complex': [
const ExampleItem('Example 5: Object Manipulation',
ObjectManipulationExample(), Icons.transform),
const ExampleItem(
'Example 6: Advanced Arrays', ArrayAdvancedExample(), Icons.list),
const ExampleItem(
'Example 7: Type-safe Tuples', TupleExample(), Icons.view_list),
const ExampleItem(
'Example 8: Flexible Enums', EnumExample(), Icons.list_alt),
const ExampleItem(
'Example 9: Key-value Records', RecordExample(), Icons.table_chart),
],
'Advanced': [
const ExampleItem('Example 10: Discriminated Unions',
DiscriminatedUnionExample(), Icons.account_tree),
const ExampleItem('Example 11: Validation Pipelines', PipelineExample(),
Icons.plumbing),
const ExampleItem('Example 12: Recursive Schemas',
RecursiveSchemaExample(), Icons.account_tree),
const ExampleItem(
'Example 13: Type Coercion', CoercionExample(), Icons.transform),
],
'Async': [
const ExampleItem('Example 14: Database Validation',
DatabaseValidationExample(), Icons.storage),
const ExampleItem('Example 15: API Validation', ApiValidationExample(),
Icons.cloud_done),
],
'Error Handling': [
const ExampleItem('Example 20: Error Code System',
ErrorCodeSystemExample(), Icons.error_outline),
const ExampleItem('Example 21: Error Formatting',
ErrorFormattingExample(), Icons.format_list_bulleted),
],
'Schema Composition': [
const ExampleItem('Example 23: Schema Introspection',
IntrospectionExample(), Icons.schema),
const ExampleItem('Example 25: JSON Schema Generation',
JsonSchemaGenerationExample(), Icons.code),
],
'Security': [
const ExampleItem('Example 30: Security Best Practices',
SecurityBestPracticesExample(), Icons.security),
],
'Real World': [
const ExampleItem('Example 32: Authentication Schema',
AuthenticationSchemaExample(), Icons.lock),
],
};
List<Widget> get _currentExamples =>
_categorizedExamples[_selectedCategory]!.map((e) => e.widget).toList();
List<String> get _currentTitles =>
_categorizedExamples[_selectedCategory]!.map((e) => e.title).toList();
List<IconData> get _currentIcons =>
_categorizedExamples[_selectedCategory]!.map((e) => e.icon).toList();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Dzod Validation Showcase'),
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
elevation: 0,
),
body: Row(
children: [
// Sidebar with categories and examples
SizedBox(
width: MediaQuery.of(context).size.width > 800 ? 300 : 250,
child: Card(
margin: const EdgeInsets.all(8),
child: Column(
children: [
// Category selector
Container(
padding: const EdgeInsets.all(16),
child: DropdownButtonFormField<String>(
value: _selectedCategory,
onChanged: (value) {
setState(() {
_selectedCategory = value!;
_selectedIndex = 0;
});
},
decoration: const InputDecoration(
labelText: 'Category',
border: OutlineInputBorder(),
contentPadding:
EdgeInsets.symmetric(horizontal: 12, vertical: 8),
),
items: _categorizedExamples.keys.map((category) {
return DropdownMenuItem(
value: category,
child: Text(category),
);
}).toList(),
),
),
// Examples list
Expanded(
child: ListView.builder(
itemCount: _currentTitles.length,
itemBuilder: (context, index) {
final isSelected = index == _selectedIndex;
return ListTile(
selected: isSelected,
leading: Icon(
_currentIcons[index],
color: isSelected
? Theme.of(context).colorScheme.primary
: Theme.of(context)
.colorScheme
.onSurfaceVariant,
),
title: Text(
_currentTitles[index],
style: TextStyle(
fontWeight: isSelected
? FontWeight.bold
: FontWeight.normal,
fontSize: 13,
),
),
onTap: () {
setState(() {
_selectedIndex = index;
});
},
);
},
),
),
// Stats footer
Container(
padding: const EdgeInsets.all(16),
child: Column(
children: [
const Divider(),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Column(
children: [
Text(
'${_categorizedExamples.values.expand((e) => e).length}',
style: Theme.of(context)
.textTheme
.titleLarge
?.copyWith(
color: Theme.of(context)
.colorScheme
.primary,
fontWeight: FontWeight.bold,
),
),
Text(
'Examples',
style: Theme.of(context).textTheme.bodySmall,
),
],
),
Column(
children: [
Text(
'${_categorizedExamples.length}',
style: Theme.of(context)
.textTheme
.titleLarge
?.copyWith(
color: Theme.of(context)
.colorScheme
.secondary,
fontWeight: FontWeight.bold,
),
),
Text(
'Categories',
style: Theme.of(context).textTheme.bodySmall,
),
],
),
],
),
],
),
),
],
),
),
),
// Content Area
Expanded(
child: SingleChildScrollView(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Header with category info
Row(
children: [
Icon(
_getCategoryIcon(_selectedCategory),
size: 32,
color: Theme.of(context).colorScheme.primary,
),
const SizedBox(width: 12),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'$_selectedCategory Examples',
style: Theme.of(context)
.textTheme
.headlineMedium
?.copyWith(
color:
Theme.of(context).colorScheme.onSurface,
fontWeight: FontWeight.bold,
),
),
Text(
_getCategoryDescription(_selectedCategory),
style: Theme.of(context)
.textTheme
.bodyLarge
?.copyWith(
color: Theme.of(context)
.colorScheme
.onSurfaceVariant,
),
),
],
),
),
],
),
const SizedBox(height: 24),
// Current example
_currentExamples[_selectedIndex],
],
),
),
),
],
),
);
}
IconData _getCategoryIcon(String category) {
switch (category) {
case 'Basic':
return Icons.foundation;
case 'Complex':
return Icons.architecture;
case 'Advanced':
return Icons.rocket_launch;
case 'Async':
return Icons.sync;
case 'Error Handling':
return Icons.error_outline;
case 'Schema Composition':
return Icons.schema;
case 'Security':
return Icons.security;
case 'Real World':
return Icons.public;
default:
return Icons.code;
}
}
String _getCategoryDescription(String category) {
switch (category) {
case 'Basic':
return 'Fundamental validation patterns for common data types';
case 'Complex':
return 'Advanced data structure validation with objects, arrays, and collections';
case 'Advanced':
return 'Sophisticated validation patterns with unions, pipelines, and recursion';
case 'Async':
return 'Asynchronous validation with database checks and API calls';
case 'Error Handling':
return 'Comprehensive error reporting and formatting strategies';
case 'Schema Composition':
return 'Schema introspection, transformation, and JSON Schema generation';
case 'Security':
return 'Security-focused validation patterns to prevent common vulnerabilities';
case 'Real World':
return 'Production-ready examples for real-world applications';
default:
return 'Interactive validation examples';
}
}
}Metadata
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Metadata
A powerful Dart schema validation library inspired by Zod, providing type-safe validation, parsing, and inference with excellent developer experience.
Repository (GitHub)
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Documentation
License
MIT (license)
