FluentValidation 8.4.0

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

There is a newer prerelease version of this package available.
See the version list below for details.
Install-Package FluentValidation -Version 8.4.0
dotnet add package FluentValidation --version 8.4.0
<PackageReference Include="FluentValidation" Version="8.4.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 8.4.0
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 8.4.0:
* 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

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Version History

Version Downloads Last updated
8.5.0-preview4 6,793 7/23/2019
8.5.0-preview3 2,308 7/10/2019
8.5.0-preview2 6,505 6/13/2019
8.5.0-preview1 8,727 5/10/2019
8.4.0 874,095 5/10/2019
8.3.0 188,465 4/24/2019
8.2.3 114,274 4/12/2019
8.2.2 186,804 4/5/2019
8.2.1 19,759 4/4/2019
8.2.0 177,512 3/26/2019
8.1.3 1,233,497 1/25/2019
8.1.2 589,884 12/18/2018
8.1.1 148,791 12/11/2018
8.1.0 96,323 12/6/2018
8.1.0-preview2 4,410 11/14/2018
8.1.0-preview1 4,263 10/14/2018
8.0.101 218,872 11/24/2018
8.0.100 1,153,766 9/4/2018
8.0.0 268,040 8/16/2018
8.0.0-rc1 12,837 7/24/2018
8.0.0-preview4 1,946 7/16/2018
8.0.0-preview3 925 7/13/2018
8.0.0-preview2 670 7/13/2018
7.6.105 175,194 8/11/2018
7.6.104 872,256 7/6/2018
7.6.103 381,748 6/16/2018
7.6.102 86,161 6/14/2018
7.6.101 21,298 6/13/2018
7.6.100 54,344 6/7/2018
7.6.0 139,612 6/1/2018
7.6.0-preview1 8,454 4/12/2018
7.5.2 1,157,741 3/16/2018
7.5.1 71,218 3/11/2018
7.5.0 269,402 2/26/2018
7.4.0 427,641 1/26/2018
7.3.4 344,356 1/2/2018
7.3.3 86,054 12/22/2017
7.3.2 14,311 12/21/2017
7.3.1 102,388 12/13/2017
7.3.0 6,904 12/13/2017
7.3.0-beta3 5,430 12/8/2017
7.3.0-beta2 12,420 11/20/2017
7.3.0-beta1 2,232 11/11/2017
7.2.1 924,369 10/24/2017
7.2.0 281,861 10/5/2017
7.2.0-beta3 17,505 9/5/2017
7.2.0-beta2 3,850 8/22/2017
7.2.0-beta1 931 8/19/2017
7.1.1 730,043 7/25/2017
7.1.0 232,419 6/28/2017
7.1.0-beta1 804 6/24/2017
7.0.3 171,535 6/7/2017
7.0.2 106,134 5/26/2017
7.0.1 32,999 5/23/2017
7.0.0 108,517 5/19/2017
7.0.0-beta3 4,573 5/1/2017
7.0.0-beta2 4,372 4/17/2017
7.0.0-beta1 1,917 4/7/2017
6.4.1 471,833 3/15/2017
6.4.1-beta1 1,639 3/13/2017
6.4.0 351,229 3/3/2017
6.4.0-rc4 122,029 2/13/2017
6.4.0-rc3 10,011 2/3/2017
6.4.0-rc2 16,844 1/30/2017
6.4.0-rc1 778 1/30/2017
6.4.0-beta9 52,995 11/21/2016
6.4.0-beta8 24,321 10/31/2016
6.4.0-beta7 1,183 10/28/2016
6.4.0-beta6 1,575 10/25/2016
6.4.0-beta5 1,315 10/24/2016
6.4.0-beta4 1,312 10/21/2016
6.4.0-beta3 41,222 7/4/2016
6.4.0-beta2 2,129 7/1/2016
6.4.0-beta10 665 1/30/2017
6.4.0-beta1 4,077 6/28/2016
6.3.4-alpha 125,587 6/1/2016
6.3.3-alpha 1,059 5/27/2016
6.2.1 1,661,406 2/26/2016
6.2.1-beta1 4,803 2/24/2016
6.2.0 30,852 2/22/2016
6.2.0-beta1 1,071 2/12/2016
6.1.0 176,682 1/18/2016
6.0.2 55,207 1/5/2016
6.0.1 9,360 1/5/2016
6.0.0 29,312 12/22/2015
5.6.2 605,954 5/29/2015
5.6.1 6,236 5/29/2015
5.5.0 420,617 10/31/2014
5.4.0 250,492 7/3/2014
5.3.0 48,378 5/27/2014
5.2.0 20,086 5/21/2014
5.1.0 244,727 3/11/2014
5.0.0.1 143,517 10/24/2013
4.0.0.1 115,013 7/18/2013
4.0.0 58,465 4/29/2013
3.4.6 166,879 8/30/2012
3.4.0 23,595 8/17/2012
3.3.1 19,384 3/30/2012
3.2.0 32,117 11/14/2011
3.1.0 26,245 7/30/2011
3.0.0.1 2,764 7/5/2011
3.0.0 3,348 6/25/2011
2.0.0 14,201 1/9/2011
1.3.0 16,617 1/7/2011