FluentValidation 8.5.0-preview1

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

Showing the top 20 packages that depend on FluentValidation.

Packages Downloads
AgileLabs.Testing.Web
Package Description
69
FluentValidation.AspNetCore
AAspNetCore integration for FluentValidation
64
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
62
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
65
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
67
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
3,688
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
62
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
63
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
65
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
66
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
67
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
69
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
76
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
956
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
3,662
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
14,157

FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8 Changes in 8.4.0: * Added simplified version of several messages across all translations to aid with ASP.NET Clientside validation. * New enum validator for string properties. Changes in 8.3.0: * Fix issue in ASP.NET Core integration with GetServiceProvider not working correctly when invoked against a CustomContext/MessageBuilderContext. * Improved how LanguageStringSource works with error-code overrides. * Fix thread-safety issue with use of PropertyValidatorOptions.Empty (now removed). * Improved how calls to When/Unless are handled internally. * DelegatingValidator is now marked as deprecated. * Improvements to Croatian language translations. * Improvements to Georgian language translations. * Resolved subtle bug where top-level WhenAsync wouldn't work correctly when wrapping a top-level call to When. Changes in 8.2.3: * Fix issue in WebApi integration where DataAnnotations validators could generate duplicate messages when in the same project as FluentValidation. Changes in 8.2.2: * Fix FluentValidation.DependencyInjection package name. Changes in 8.2.1: * Resolved issue using InjectValidator with RuleForEach. * Add support for a default IValidatorInterceptor to be registered with the ASP.NET Core Service Provider. Changes in 8.2.0: * Add extensions for injecting child validators using the ASP.NET Core Service Provider. * Implement RuleFor(...).ForEach(...) as an alternative to RuleForEach. * WithLocalizedMessage is deprecated. Use the overload of WithMessage that takes a Func instead. Changes in 8.1.3: * Resolved issue where clientside validation was incorrectly generating metadata for rules with shared conditions. * ScalePrecisionValidator now has a public method in the fluent interface. * Fix placeholder names in ScalePrecisionValidator for consistency. * Updates to Portuguese (Brazil) translations. Changes in 8.1.2: * Fix issue where shared When/Unless conditions didn't execute correctly when used with RuleForEach. Changes in 8.1.1: * Added RuleSetsExecuted property on ValidationResult. * Resolved issue introduced in 8.1 where the shared condition cache does not work correctly with RuleForEach (#970). Changes in 8.1: * Add format support in message placeholders. * Added support for overriding indexers for collection rules. * Allow error codes to be used to override localization key in the Language Manager. * Additional error details are now shown in the ShouldNotHaveValidationErrorFor test extension. * Conditions defined with root-level When/WhenAsync/Unless/UnlessAsync are now only executed once (instead of once for each rule). * Support Otherwise method chained from root-level When/WhenAsync/Unless/UnlessAsync. * Minor wording changes to default English error messages. * Japanese translation of the default error messages. * Added Skip property to MVC5's CustomizeValidatorAttribute for parity with AspNetCore and WebApi. * Remove type constraint on the OverridePropertyName overload that takes an expression. Added Skip property to MVC5's CustomizeValidatorAttribute to bring parity with AspNetCore and WebApi integration. Changes in 8.0: * Support validating only specific properties by path. * Added OnFailure method * Deprecated RuleFor(..).SetCollectionValidator in favour of RuleForEach(...).SetValidator * IStringSource.GetString now takes a validation context instead of a model instance. * Introduce PropertyValidatorOptions in order to clean up the IPropretyValidator interface. * Moved the legacy ValidatorAttribute and AttributedValidatorFactory into a separate FluentValidation.Attributes package. * Remove the pre-7.0 localization mechanism * Remove the pre-7.0 methods for custom validation * Removed many other deprecated methods Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt

Version Downloads Last updated
12.1.1 33 12/04/2025
12.1.0 36 11/07/2025
12.0.0 45 05/09/2025
12.0.0-preview1 53 01/02/2025
11.12.0 28 11/06/2025
11.11.0 66 11/27/2024
11.10.0 65 11/26/2024
11.9.2 53 12/03/2024
11.9.1 652 05/03/2024
11.9.0 61 04/20/2024
11.8.1 81 05/10/2024
11.8.0 62 05/22/2024
11.7.1 49 12/05/2024
11.7.0 48 05/15/2024
11.6.0 53 11/28/2024
11.5.2 58 06/22/2023
11.5.1 61 04/11/2023
11.5.0 56 05/18/2024
11.4.0 57 05/02/2024
11.3.0 48 12/05/2024
11.2.2 13,676 11/03/2022
11.2.1 50 12/04/2024
11.2.0 58 12/11/2024
11.1.1 44 11/16/2024
11.1.0 3,629 07/25/2022
11.0.3 54 11/14/2024
11.0.2 51 12/06/2024
11.0.1 55 12/04/2024
11.0.0 56 05/06/2024
10.3.1 53 11/30/2024
10.2.1 53 05/11/2022
10.2.0 55 12/05/2024
9.5.4 55 12/04/2024
9.4.0 62 05/26/2024
9.3.0-preview3 58 05/25/2024
9.3.0-preview2 52 05/25/2024
9.2.2 48 06/01/2024
9.2.1 54 01/04/2025
9.1.2 48 12/03/2024
9.1.1 52 12/02/2024
9.1.0 46 12/05/2024
9.0.1 50 12/04/2024
9.0.0-preview5 61 05/25/2024
9.0.0-preview3 50 05/25/2024
9.0.0-preview2 51 05/25/2024
9.0.0-preview1 56 05/25/2024
8.6.3 59 12/02/2024
8.6.2 51 11/04/2022
8.6.1 46 11/29/2024
8.5.0 57 05/16/2024
8.5.0-preview5 47 05/25/2024
8.5.0-preview3 48 05/25/2024
8.5.0-preview1 59 05/25/2024
8.3.0 50 12/06/2024
8.2.1 57 05/10/2022
8.1.2 57 12/10/2024
8.0.100 58 11/16/2024
8.0.0-rc1 57 11/16/2024
8.0.0-preview3 53 05/25/2024
7.6.104 58 05/23/2024
7.6.0-preview1 64 05/25/2024
7.5.1 53 12/04/2024
7.4.0 56 05/15/2024
7.3.2 52 05/30/2024
7.3.1 50 12/04/2024
7.3.0-beta2 47 11/28/2024
7.2.1 46 05/23/2024
7.2.0 44 12/04/2024
7.2.0-beta2 49 11/29/2024
7.1.0-beta1 52 12/12/2024
7.0.1 61 05/11/2022
7.0.0 43 12/07/2024
7.0.0-beta2 39 11/28/2024
7.0.0-beta1 52 11/17/2024
6.4.1 59 05/31/2024
6.4.1-beta1 58 12/06/2024
6.4.0-rc2 47 12/03/2024
6.4.0-rc1 55 11/24/2024
6.4.0-beta8 50 12/04/2024
6.4.0-beta7 57 11/16/2024
6.4.0-beta4 57 11/28/2024
6.4.0-beta3 61 11/14/2024
6.4.0-beta1 64 12/10/2024
6.2.1-beta1 44 12/04/2024
6.1.0 45 05/14/2024
6.0.1 54 11/14/2024
6.0.0 59 11/17/2024
5.6.2 44 05/13/2024
5.6.1 53 05/03/2024
5.3.0 60 12/11/2024
4.0.0.1 54 05/20/2024
3.0.0.1 53 05/23/2024
3.0.0 44 01/03/2025
2.0.0 64 05/08/2022