FluentValidation 8.5.0-preview5

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There is a newer version of this package available.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.

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

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Version History

Version Downloads Last updated
8.6.0 6,844 12/4/2019
8.5.1 214,860 11/2/2019
8.5.0 531,143 9/24/2019
8.5.0-preview5 24,388 9/1/2019
8.5.0-preview4 45,336 7/23/2019
8.5.0-preview3 23,852 7/10/2019
8.5.0-preview2 30,024 6/13/2019
8.5.0-preview1 32,777 5/10/2019
8.4.0 2,657,597 5/10/2019
8.3.0 308,087 4/24/2019
8.2.3 188,626 4/12/2019
8.2.2 295,812 4/5/2019
8.2.1 49,383 4/4/2019
8.2.0 299,855 3/26/2019
8.1.3 1,851,700 1/25/2019
8.1.2 780,841 12/18/2018
8.1.1 215,398 12/11/2018
8.1.0 146,710 12/6/2018
8.1.0-preview2 24,020 11/14/2018
8.1.0-preview1 23,903 10/14/2018
8.0.101 286,051 11/24/2018
8.0.100 1,432,037 9/4/2018
8.0.0 334,510 8/16/2018
8.0.0-rc1 32,671 7/24/2018
8.0.0-preview4 21,361 7/16/2018
8.0.0-preview3 20,268 7/13/2018
8.0.0-preview2 20,028 7/13/2018
7.6.105 257,242 8/11/2018
7.6.104 1,049,986 7/6/2018
7.6.103 473,658 6/16/2018
7.6.102 119,374 6/14/2018
7.6.101 43,140 6/13/2018
7.6.100 80,881 6/7/2018
7.6.0 185,822 6/1/2018
7.6.0-preview1 28,369 4/12/2018
7.5.2 1,344,302 3/16/2018
7.5.1 102,387 3/11/2018
7.5.0 351,097 2/26/2018
7.4.0 515,512 1/26/2018
7.3.4 426,158 1/2/2018
7.3.3 111,431 12/22/2017
7.3.2 37,771 12/21/2017
7.3.1 137,760 12/13/2017
7.3.0 27,345 12/13/2017
7.3.0-beta3 24,771 12/8/2017
7.3.0-beta2 33,256 11/20/2017
7.3.0-beta1 21,650 11/11/2017
7.2.1 1,068,195 10/24/2017
7.2.0 362,032 10/5/2017
7.2.0-beta3 36,952 9/5/2017
7.2.0-beta2 23,229 8/22/2017
7.2.0-beta1 20,273 8/19/2017
7.1.1 821,435 7/25/2017
7.1.0 270,364 6/28/2017
7.1.0-beta1 20,126 6/24/2017
7.0.3 204,732 6/7/2017
7.0.2 137,816 5/26/2017
7.0.1 53,610 5/23/2017
7.0.0 152,757 5/19/2017
7.0.0-beta3 23,920 5/1/2017
7.0.0-beta2 23,716 4/17/2017
7.0.0-beta1 21,246 4/7/2017
6.4.1 538,917 3/15/2017
6.4.1-beta1 21,002 3/13/2017
6.4.0 397,470 3/3/2017
6.4.0-rc4 141,694 2/13/2017
6.4.0-rc3 29,375 2/3/2017
6.4.0-rc2 36,193 1/30/2017
6.4.0-rc1 20,115 1/30/2017
6.4.0-beta9 73,241 11/21/2016
6.4.0-beta8 43,957 10/31/2016
6.4.0-beta7 20,580 10/28/2016
6.4.0-beta6 20,992 10/25/2016
6.4.0-beta5 20,705 10/24/2016
6.4.0-beta4 20,722 10/21/2016
6.4.0-beta3 60,844 7/4/2016
6.4.0-beta2 21,555 7/1/2016
6.4.0-beta10 19,972 1/30/2017
6.4.0-beta1 23,589 6/28/2016
6.3.4-alpha 161,280 6/1/2016
6.3.3-alpha 20,388 5/27/2016
6.2.1 1,816,487 2/26/2016
6.2.1-beta1 24,143 2/24/2016
6.2.0 58,377 2/22/2016
6.2.0-beta1 20,408 2/12/2016
6.1.0 208,886 1/18/2016
6.0.2 78,881 1/5/2016
6.0.1 30,760 1/5/2016
6.0.0 54,281 12/22/2015
5.6.2 665,145 5/29/2015
5.6.1 25,743 5/29/2015
5.5.0 489,438 10/31/2014
5.4.0 282,761 7/3/2014
5.3.0 69,564 5/27/2014
5.2.0 41,684 5/21/2014
5.1.0 291,654 3/11/2014
5.0.0.1 172,710 10/24/2013
4.0.0.1 141,750 7/18/2013
4.0.0 79,660 4/29/2013
3.4.6 192,882 8/30/2012
3.4.0 43,595 8/17/2012
3.3.1 38,841 3/30/2012
3.2.0 51,859 11/14/2011
3.1.0 45,816 7/30/2011
3.0.0.1 22,122 7/5/2011
3.0.0 23,330 6/25/2011
2.0.0 35,580 1/9/2011
1.3.0 37,225 1/7/2011