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There is a newer version of this package available.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
9.0.0-preview5 0 5/23/2020
9.0.0-preview4 6,236 4/22/2020
9.0.0-preview3 27,285 2/29/2020
9.0.0-preview2 8,059 2/21/2020
9.0.0-preview1 17,360 2/8/2020
8.6.2 1,195,851 2/29/2020
8.6.1 1,828,396 12/28/2019
8.6.0 1,016,966 12/4/2019
8.5.1 926,015 11/2/2019
8.5.0 1,412,283 9/24/2019
8.5.0-preview5 37,426 9/1/2019
8.5.0-preview4 61,976 7/23/2019
8.5.0-preview3 25,107 7/10/2019
8.5.0-preview2 32,961 6/13/2019
8.5.0-preview1 38,582 5/10/2019
8.4.0 4,546,245 5/10/2019
8.3.0 592,766 4/24/2019
8.2.3 257,083 4/12/2019
8.2.2 396,693 4/5/2019
8.2.1 66,867 4/4/2019
8.2.0 431,719 3/26/2019
8.1.3 2,477,050 1/25/2019
8.1.2 1,008,866 12/18/2018
8.1.1 275,721 12/11/2018
8.1.0 197,622 12/6/2018
8.1.0-preview2 24,736 11/14/2018
8.1.0-preview1 24,841 10/14/2018
8.0.101 340,366 11/24/2018
8.0.100 1,805,666 9/4/2018
8.0.0 401,833 8/16/2018
8.0.0-rc1 33,429 7/24/2018
8.0.0-preview4 21,635 7/16/2018
8.0.0-preview3 20,474 7/13/2018
8.0.0-preview2 20,233 7/13/2018
7.6.105 360,972 8/11/2018
7.6.104 1,314,785 7/6/2018
7.6.103 568,490 6/16/2018
7.6.102 138,228 6/14/2018
7.6.101 57,793 6/13/2018
7.6.100 106,331 6/7/2018
7.6.0 215,157 6/1/2018
7.6.0-preview1 29,714 4/12/2018
7.5.2 1,577,871 3/16/2018
7.5.1 131,258 3/11/2018
7.5.0 427,559 2/26/2018
7.4.0 615,967 1/26/2018
7.3.4 511,668 1/2/2018
7.3.3 123,390 12/22/2017
7.3.2 41,061 12/21/2017
7.3.1 154,043 12/13/2017
7.3.0 29,979 12/13/2017
7.3.0-beta3 24,967 12/8/2017
7.3.0-beta2 35,725 11/20/2017
7.3.0-beta1 21,922 11/11/2017
7.2.1 1,270,193 10/24/2017
7.2.0 425,752 10/5/2017
7.2.0-beta3 37,223 9/5/2017
7.2.0-beta2 23,485 8/22/2017
7.2.0-beta1 20,436 8/19/2017
7.1.1 915,560 7/25/2017
7.1.0 292,213 6/28/2017
7.1.0-beta1 20,287 6/24/2017
7.0.3 227,870 6/7/2017
7.0.2 148,526 5/26/2017
7.0.1 54,847 5/23/2017
7.0.0 189,014 5/19/2017
7.0.0-beta3 24,117 5/1/2017
7.0.0-beta2 23,903 4/17/2017
7.0.0-beta1 21,435 4/7/2017
6.4.1 609,888 3/15/2017
6.4.1-beta1 21,190 3/13/2017
6.4.0 441,962 3/3/2017
6.4.0-rc4 142,315 2/13/2017
6.4.0-rc3 29,660 2/3/2017
6.4.0-rc2 36,369 1/30/2017
6.4.0-rc1 20,285 1/30/2017
6.4.0-beta9 74,830 11/21/2016
6.4.0-beta8 45,417 10/31/2016
6.4.0-beta7 20,844 10/28/2016
6.4.0-beta6 21,262 10/25/2016
6.4.0-beta5 20,959 10/24/2016
6.4.0-beta4 20,972 10/21/2016
6.4.0-beta3 61,765 7/4/2016
6.4.0-beta2 21,818 7/1/2016
6.4.0-beta10 20,140 1/30/2017
6.4.0-beta1 23,964 6/28/2016
6.3.4-alpha 191,601 6/1/2016
6.3.3-alpha 20,572 5/27/2016
6.2.1 2,029,423 2/26/2016
6.2.1-beta1 24,350 2/24/2016
6.2.0 69,271 2/22/2016
6.2.0-beta1 20,594 2/12/2016
6.1.0 223,047 1/18/2016
6.0.2 84,404 1/5/2016
6.0.1 32,727 1/5/2016
6.0.0 57,315 12/22/2015
5.6.2 730,184 5/29/2015
5.6.1 26,249 5/29/2015
5.5.0 551,922 10/31/2014
5.4.0 315,156 7/3/2014
5.3.0 72,090 5/27/2014
5.2.0 45,333 5/21/2014
5.1.0 325,034 3/11/2014
5.0.0.1 185,867 10/24/2013
4.0.0.1 153,633 7/18/2013
4.0.0 82,605 4/29/2013
3.4.6 202,352 8/30/2012
3.4.0 45,738 8/17/2012
3.3.1 39,633 3/30/2012
3.2.0 52,715 11/14/2011
3.1.0 46,541 7/30/2011
3.0.0.1 22,349 7/5/2011
3.0.0 25,101 6/25/2011
2.0.0 38,215 1/9/2011
1.3.0 39,674 1/7/2011
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