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 7,478 7/23/2019
8.5.0-preview3 2,341 7/10/2019
8.5.0-preview2 6,628 6/13/2019
8.5.0-preview1 8,918 5/10/2019
8.4.0 903,424 5/10/2019
8.3.0 190,273 4/24/2019
8.2.3 115,412 4/12/2019
8.2.2 188,387 4/5/2019
8.2.1 19,914 4/4/2019
8.2.0 179,115 3/26/2019
8.1.3 1,244,581 1/25/2019
8.1.2 593,169 12/18/2018
8.1.1 149,831 12/11/2018
8.1.0 96,952 12/6/2018
8.1.0-preview2 4,418 11/14/2018
8.1.0-preview1 4,265 10/14/2018
8.0.101 219,619 11/24/2018
8.0.100 1,158,559 9/4/2018
8.0.0 268,783 8/16/2018
8.0.0-rc1 12,838 7/24/2018
8.0.0-preview4 1,947 7/16/2018
8.0.0-preview3 925 7/13/2018
8.0.0-preview2 670 7/13/2018
7.6.105 175,989 8/11/2018
7.6.104 875,251 7/6/2018
7.6.103 382,821 6/16/2018
7.6.102 86,494 6/14/2018
7.6.101 21,311 6/13/2018
7.6.100 54,436 6/7/2018
7.6.0 140,110 6/1/2018
7.6.0-preview1 8,458 4/12/2018
7.5.2 1,160,284 3/16/2018
7.5.1 71,380 3/11/2018
7.5.0 270,466 2/26/2018
7.4.0 429,025 1/26/2018
7.3.4 345,239 1/2/2018
7.3.3 86,178 12/22/2017
7.3.2 14,372 12/21/2017
7.3.1 102,607 12/13/2017
7.3.0 6,920 12/13/2017
7.3.0-beta3 5,431 12/8/2017
7.3.0-beta2 12,431 11/20/2017
7.3.0-beta1 2,235 11/11/2017
7.2.1 926,703 10/24/2017
7.2.0 282,843 10/5/2017
7.2.0-beta3 17,508 9/5/2017
7.2.0-beta2 3,850 8/22/2017
7.2.0-beta1 931 8/19/2017
7.1.1 731,247 7/25/2017
7.1.0 232,791 6/28/2017
7.1.0-beta1 804 6/24/2017
7.0.3 171,733 6/7/2017
7.0.2 106,271 5/26/2017
7.0.1 33,010 5/23/2017
7.0.0 108,929 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
6.4.1 472,771 3/15/2017
6.4.1-beta1 1,640 3/13/2017
6.4.0 351,814 3/3/2017
6.4.0-rc4 122,035 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 53,009 11/21/2016
6.4.0-beta8 24,362 10/31/2016
6.4.0-beta7 1,186 10/28/2016
6.4.0-beta6 1,578 10/25/2016
6.4.0-beta5 1,318 10/24/2016
6.4.0-beta4 1,315 10/21/2016
6.4.0-beta3 41,258 7/4/2016
6.4.0-beta2 2,132 7/1/2016
6.4.0-beta10 665 1/30/2017
6.4.0-beta1 4,083 6/28/2016
6.3.4-alpha 125,786 6/1/2016
6.3.3-alpha 1,059 5/27/2016
6.2.1 1,663,883 2/26/2016
6.2.1-beta1 4,803 2/24/2016
6.2.0 30,929 2/22/2016
6.2.0-beta1 1,071 2/12/2016
6.1.0 176,917 1/18/2016
6.0.2 55,291 1/5/2016
6.0.1 9,408 1/5/2016
6.0.0 29,361 12/22/2015
5.6.2 606,563 5/29/2015
5.6.1 6,238 5/29/2015
5.5.0 421,501 10/31/2014
5.4.0 250,679 7/3/2014
5.3.0 48,390 5/27/2014
5.2.0 20,118 5/21/2014
5.1.0 245,123 3/11/2014
5.0.0.1 143,768 10/24/2013
4.0.0.1 115,096 7/18/2013
4.0.0 58,496 4/29/2013
3.4.6 167,001 8/30/2012
3.4.0 23,602 8/17/2012
3.3.1 19,385 3/30/2012
3.2.0 32,119 11/14/2011
3.1.0 26,250 7/30/2011
3.0.0.1 2,764 7/5/2011
3.0.0 3,354 6/25/2011
2.0.0 14,228 1/9/2011
1.3.0 16,656 1/7/2011