FluentValidation 8.5.0-preview5 The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

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

This is a prerelease version of FluentValidation.
There is a newer version of this package available.
See the version list below for details.
Install-Package FluentValidation -Version 8.5.0-preview5
dotnet add package FluentValidation --version 8.5.0-preview5
<PackageReference Include="FluentValidation" Version="8.5.0-preview5" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 8.5.0-preview5
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: FluentValidation, 8.5.0-preview5"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install FluentValidation as a Cake Addin
#addin nuget:?package=FluentValidation&version=8.5.0-preview5&prerelease

// Install FluentValidation as a Cake Tool
#tool nuget:?package=FluentValidation&version=8.5.0-preview5&prerelease
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8

Changes in 8.5.0:
* Add additional overload of the EmailAddress validator for compatibility with ASP.NET Core's default email validation.
* Simplify the advanced testhelper syntax.
* Add support for ASP.NET Core 3.
* Add support for defining child rules inline.
* ValidatorDescriptor now has consistent handling of model-level rules.
* RuleForEach can now access collection index in error message with {CollectionIndex} placeholder.
* Welsh language translations of default error messages.
* Hungrian language translations of default error messages.
* Indonesian language translations of default error messages.
* Using RuleForEach combined with When is now more intuitive.
* Fixed order of rule execution when using async validation.

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

NuGet packages (967)

Showing the top 5 NuGet packages that depend on FluentValidation:

Package Downloads
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
FluentValidation.WebAPI
ASP.NET WebApi integration for FluentValidation
MicroElements.Swashbuckle.FluentValidation
Swagger ISchemaFilter that uses FluentValidation validators instead System.ComponentModel based attributes.
FluentValidation.MVC5
ASP.NET MVC 5 integration for FluentValidation

GitHub repositories (117)

Showing the top 5 popular GitHub repositories that depend on FluentValidation:

Repository Stars
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
NancyFx/Nancy
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
abpframework/abp
Open Source Web Application Framework for ASP.NET Core
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
ThreeMammals/Ocelot
.NET core API Gateway

Version History

Version Downloads Last updated
10.3.3 264,926 8/24/2021
10.3.1 75,533 8/19/2021
10.3.0 976,196 7/9/2021
10.2.3 1,238,864 6/3/2021
10.2.2 97,971 6/1/2021
10.2.1 114,311 5/30/2021
10.2.0 40,909 5/28/2021
10.1.0 1,055,088 4/28/2021
10.0.4 518,687 4/17/2021
9.5.4 540,969 4/5/2021
9.5.3 1,198,359 3/15/2021
9.5.2 497,679 3/8/2021
9.5.1 1,749,258 2/11/2021
9.5.0 841,723 1/31/2021
9.4.0 1,031,201 1/14/2021
9.3.0 4,272,984 11/10/2020
9.3.0-preview3 17,796 10/19/2020
9.3.0-preview2 75,327 9/15/2020
9.3.0-preview1 7,133 8/26/2020
9.2.2 2,737,040 9/20/2020
9.2.1 8,850 9/19/2020
9.2.0 3,156,337 8/26/2020
9.1.3 512,985 8/19/2020
9.1.2 379,657 8/12/2020
9.1.1 261,625 8/8/2020
9.1.0 12,012 8/8/2020
9.0.1 1,710,687 7/14/2020
9.0.0-preview5 53,984 5/23/2020
9.0.0-preview4 58,880 4/22/2020
9.0.0-preview3 106,272 2/29/2020
9.0.0-preview2 24,810 2/21/2020
9.0.0-preview1 52,724 2/8/2020
8.6.3 741,702 8/28/2020
8.6.2 11,605,092 2/29/2020
8.6.1 5,931,570 12/28/2019
8.6.0 2,299,561 12/4/2019
8.5.1 1,978,507 11/2/2019
8.5.0 2,925,286 9/24/2019
8.5.0-preview5 49,384 9/1/2019
8.5.0-preview4 74,286 7/23/2019
8.5.0-preview3 26,358 7/10/2019
8.5.0-preview2 42,435 6/13/2019
8.5.0-preview1 44,965 5/10/2019
8.4.0 7,900,922 5/10/2019
8.3.0 1,628,139 4/24/2019
8.2.3 404,111 4/12/2019
8.2.2 604,398 4/5/2019
8.2.1 125,594 4/4/2019
8.2.0 626,999 3/26/2019
8.1.3 3,510,850 1/25/2019
8.1.2 1,452,523 12/18/2018
8.1.1 421,653 12/11/2018
8.1.0 346,717 12/6/2018
8.1.0-preview2 26,102 11/14/2018
8.1.0-preview1 25,403 10/14/2018
8.0.101 456,244 11/24/2018
8.0.100 2,535,646 9/4/2018
8.0.0 603,226 8/16/2018
8.0.0-rc1 39,056 7/24/2018
8.0.0-preview4 22,254 7/16/2018
8.0.0-preview3 21,021 7/13/2018
8.0.0-preview2 20,788 7/13/2018
7.6.105 769,247 8/11/2018
7.6.104 1,720,725 7/6/2018
7.6.103 812,583 6/16/2018
7.6.102 182,795 6/14/2018
7.6.101 62,880 6/13/2018
7.6.100 135,297 6/7/2018
7.6.0 262,734 6/1/2018
7.6.0-preview1 35,801 4/12/2018
7.5.2 2,171,327 3/16/2018
7.5.1 171,953 3/11/2018
7.5.0 567,464 2/26/2018
7.4.0 858,837 1/26/2018
7.3.4 712,472 1/2/2018
7.3.3 146,613 12/22/2017
7.3.2 47,878 12/21/2017
7.3.1 218,398 12/13/2017
7.3.0 36,199 12/13/2017
7.3.0-beta3 25,437 12/8/2017
7.3.0-beta2 38,911 11/20/2017
7.3.0-beta1 22,404 11/11/2017
7.2.1 1,728,565 10/24/2017
7.2.0 537,871 10/5/2017
7.2.0-beta3 38,154 9/5/2017
7.2.0-beta2 24,144 8/22/2017
7.2.0-beta1 20,848 8/19/2017
7.1.1 1,175,454 7/25/2017
7.1.0 347,143 6/28/2017
7.1.0-beta1 20,691 6/24/2017
7.0.3 482,970 6/7/2017
7.0.2 186,080 5/26/2017
7.0.1 57,984 5/23/2017
7.0.0 292,749 5/19/2017
7.0.0-beta3 24,735 5/1/2017
7.0.0-beta2 24,351 4/17/2017
7.0.0-beta1 21,870 4/7/2017
6.4.1 861,499 3/15/2017
6.4.1-beta1 21,649 3/13/2017
6.4.0 598,900 3/3/2017
6.4.0-rc4 143,037 2/13/2017
6.4.0-rc3 30,663 2/3/2017
6.4.0-rc2 36,963 1/30/2017
6.4.0-rc1 20,753 1/30/2017
6.4.0-beta9 81,167 11/21/2016
6.4.0-beta8 47,367 10/31/2016
6.4.0-beta7 21,309 10/28/2016
6.4.0-beta6 21,728 10/25/2016
6.4.0-beta5 21,429 10/24/2016
6.4.0-beta4 21,461 10/21/2016
6.4.0-beta3 65,320 7/4/2016
6.4.0-beta2 22,308 7/1/2016
6.4.0-beta10 20,609 1/30/2017
6.4.0-beta1 24,510 6/28/2016
6.3.4-alpha 255,225 6/1/2016
6.3.3-alpha 21,007 5/27/2016
6.2.1 2,727,203 2/26/2016
6.2.1-beta1 24,889 2/24/2016
6.2.0 96,609 2/22/2016
6.2.0-beta1 21,105 2/12/2016
6.1.0 271,363 1/18/2016
6.0.2 91,216 1/5/2016
6.0.1 33,643 1/5/2016
6.0.0 73,557 12/22/2015
5.6.2 911,378 5/29/2015
5.6.1 27,672 5/29/2015
5.5.0 719,470 10/31/2014
5.4.0 430,904 7/3/2014
5.3.0 79,931 5/27/2014
5.2.0 54,262 5/21/2014
5.1.0 458,395 3/11/2014
5.0.0.1 243,996 10/24/2013
4.0.0.1 184,872 7/18/2013
4.0.0 91,014 4/29/2013
3.4.6 256,515 8/30/2012
3.4.0 53,697 8/17/2012
3.3.1 44,370 3/30/2012
3.2.0 55,923 11/14/2011
3.1.0 47,908 7/30/2011
3.0.0.1 23,194 7/5/2011
3.0.0 29,801 6/25/2011
2.0.0 44,036 1/9/2011
1.3.0 63,251 1/7/2011
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