FluentValidation 8.3.0

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

There is a newer version of this package available.
See the version list below for details.
Install-Package FluentValidation -Version 8.3.0
dotnet add package FluentValidation --version 8.3.0
<PackageReference Include="FluentValidation" Version="8.3.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 8.3.0
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 8.3.0:
* 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.
* ShouldHaveChildValidator 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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Read more about the GitHub Usage information on our documentation.

Version History

Version Downloads Last updated
8.6.1 108,843 12/28/2019
8.6.0 271,666 12/4/2019
8.5.1 418,700 11/2/2019
8.5.0 745,473 9/24/2019
8.5.0-preview5 28,611 9/1/2019
8.5.0-preview4 49,715 7/23/2019
8.5.0-preview3 24,110 7/10/2019
8.5.0-preview2 30,851 6/13/2019
8.5.0-preview1 33,753 5/10/2019
8.4.0 3,119,198 5/10/2019
8.3.0 346,430 4/24/2019
8.2.3 204,258 4/12/2019
8.2.2 321,401 4/5/2019
8.2.1 53,223 4/4/2019
8.2.0 328,145 3/26/2019
8.1.3 2,016,510 1/25/2019
8.1.2 828,859 12/18/2018
8.1.1 225,918 12/11/2018
8.1.0 156,669 12/6/2018
8.1.0-preview2 24,199 11/14/2018
8.1.0-preview1 24,248 10/14/2018
8.0.101 300,538 11/24/2018
8.0.100 1,506,604 9/4/2018
8.0.0 348,383 8/16/2018
8.0.0-rc1 32,890 7/24/2018
8.0.0-preview4 21,415 7/16/2018
8.0.0-preview3 20,319 7/13/2018
8.0.0-preview2 20,079 7/13/2018
7.6.105 275,127 8/11/2018
7.6.104 1,101,144 7/6/2018
7.6.103 494,017 6/16/2018
7.6.102 122,426 6/14/2018
7.6.101 45,536 6/13/2018
7.6.100 85,172 6/7/2018
7.6.0 193,739 6/1/2018
7.6.0-preview1 28,655 4/12/2018
7.5.2 1,393,151 3/16/2018
7.5.1 108,606 3/11/2018
7.5.0 367,577 2/26/2018
7.4.0 537,127 1/26/2018
7.3.4 446,308 1/2/2018
7.3.3 113,975 12/22/2017
7.3.2 38,682 12/21/2017
7.3.1 141,773 12/13/2017
7.3.0 27,933 12/13/2017
7.3.0-beta3 24,814 12/8/2017
7.3.0-beta2 34,157 11/20/2017
7.3.0-beta1 21,741 11/11/2017
7.2.1 1,108,791 10/24/2017
7.2.0 381,256 10/5/2017
7.2.0-beta3 37,038 9/5/2017
7.2.0-beta2 23,269 8/22/2017
7.2.0-beta1 20,301 8/19/2017
7.1.1 842,295 7/25/2017
7.1.0 275,073 6/28/2017
7.1.0-beta1 20,154 6/24/2017
7.0.3 209,141 6/7/2017
7.0.2 140,428 5/26/2017
7.0.1 54,000 5/23/2017
7.0.0 160,828 5/19/2017
7.0.0-beta3 23,952 5/1/2017
7.0.0-beta2 23,750 4/17/2017
7.0.0-beta1 21,273 4/7/2017
6.4.1 552,330 3/15/2017
6.4.1-beta1 21,038 3/13/2017
6.4.0 404,263 3/3/2017
6.4.0-rc4 141,875 2/13/2017
6.4.0-rc3 29,413 2/3/2017
6.4.0-rc2 36,220 1/30/2017
6.4.0-rc1 20,142 1/30/2017
6.4.0-beta9 73,615 11/21/2016
6.4.0-beta8 44,089 10/31/2016
6.4.0-beta7 20,674 10/28/2016
6.4.0-beta6 21,082 10/25/2016
6.4.0-beta5 20,789 10/24/2016
6.4.0-beta4 20,801 10/21/2016
6.4.0-beta3 61,032 7/4/2016
6.4.0-beta2 21,635 7/1/2016
6.4.0-beta10 20,000 1/30/2017
6.4.0-beta1 23,711 6/28/2016
6.3.4-alpha 170,124 6/1/2016
6.3.3-alpha 20,417 5/27/2016
6.2.1 1,861,462 2/26/2016
6.2.1-beta1 24,178 2/24/2016
6.2.0 60,878 2/22/2016
6.2.0-beta1 20,439 2/12/2016
6.1.0 213,112 1/18/2016
6.0.2 80,312 1/5/2016
6.0.1 31,531 1/5/2016
6.0.0 56,148 12/22/2015
5.6.2 677,963 5/29/2015
5.6.1 25,847 5/29/2015
5.5.0 504,783 10/31/2014
5.4.0 288,608 7/3/2014
5.3.0 70,123 5/27/2014
5.2.0 42,748 5/21/2014
5.1.0 298,341 3/11/2014
5.0.0.1 175,400 10/24/2013
4.0.0.1 144,216 7/18/2013
4.0.0 80,279 4/29/2013
3.4.6 194,999 8/30/2012
3.4.0 44,154 8/17/2012
3.3.1 38,992 3/30/2012
3.2.0 52,016 11/14/2011
3.1.0 45,955 7/30/2011
3.0.0.1 22,171 7/5/2011
3.0.0 23,702 6/25/2011
2.0.0 36,344 1/9/2011
1.3.0 37,784 1/7/2011
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