FluentValidation 7.5.0

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There is a newer version of this package available.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 7.5.0
dotnet add package FluentValidation --version 7.5.0
<PackageReference Include="FluentValidation" Version="7.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 7.5.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

Changes in 7.5:
* Better handling of clientside messages when using custom overriden language resources
* Added flag in the ValidationContext's RootDataContext when a validator is invoked by the automatic MVC/WebApi integration
* Improvements to some of the validation tester's messages
* Added Transform method to transform property values prior to validation
* Improve support for DisplayAttribute / DisplayNameAttribute when inferring property display name
* New language translations (Slovak/Hebrew/Brizilian Portuguese)
* Cache display names by default
* Ensure ShouldHaveChildValidator test method works with model-level rules

Changes in 7.4:
* Improved syntax for DependentRules
* ValidationException serialization support when running on full framework
* Added ComparisonProperty placeholder to some validators
* The Test Helper now correctly handles read-only properties
* Add CancellationToken support to ValidateAndThrowAsync and various ValidateAsync overloads
* Improved functionality for custom MessageBuilders
* Updated AspNetCore integration to MVC version 2.0.2
* Update MVC5 AddToModelState extension not to overwrite existing attempted values
* Added SetRulesetForClientsideMessages method for MVC5/AspNetCore as an alternative to using the RulesetForClientSideMessagesAttribute

Changes in 7.3:
* Major changes to AspNetCore integration including better support for collections and implicit validation (opt-in)
* Fix - Updated EnumValidator's Flags support to handle the ~0 value
* Fix - TestHelper checking for child validator would respond with the wrong type
* Fix - Updated translations for some validators
* Fix - Overload of WithName that takes a lambda generated an exception
* Added versions of WhenAsync and UnlessAsync that support CancellationTokens
* Simplify calls to DependentRules
* Add Skip property to CustomizeValidatorAttribute in the ASP.NET Core integration

Changes in 7.2:
* Updated AspNetCore integration to support IValidatableObject
* Updated AspNetCore integration to allow mixing multiple validation strategies in the same model
* Updated AspNetCore integration to support RulesetForClientsideMessagesAttribute
* Fix - Property names were not generated properly for nested types when using AddFailure inside a Custom validator
* Fix - NullReferenceException when using CustomAsync but the validator is invoked synchronously
* Fix - Clientside integration in AspNetCore being resolved from the root-level service provider
* Fix - Allow empty string to be passed to OverridePropertyName

Changes in 7.1.1:
* Fix - Incorrect property name was generated when using RuleForEach combined with SetValidator
* Fix - Nesting async validators inside DependentRules didn't wait for completion

Changes in 7.1:
* New RuleFor().Custom() method as a replacement for the old, deprecated Custom method
* Improved messages in the ShouldHaveChildValidator test extension
* Test helper works with nested properties
* Additional overload of WithState allows access to collection item when used with RuleForEach
* Fix - Wrong values were generated as part of the MVC5 clientside integration for MinLength and MaxLength validators
* Fix - AssemblyScanner now excludes abstract and generic types
* Fix - InvalidCastException when using lazy WithMessage combined with RuleForEach
* WithState enhanced to allow access to the ValidationContext

Changes in 7.0:

7.0 is a major release that contains several breaking changes, especially with Localization. If you use FluentValidation's support for localization please read the updated documentation: https://github.com/JeremySkinner/FluentValidation/wiki/f.-Localization

* Localization rewrite to not require satellite assemblies
* New 'Custom' rule method replaces the root-level Custom method
* Switch to Netstandard based build process
* Assemblies are now signed / strongly named - see https://github.com/JeremySkinner/FluentValidation/wiki/l.-Strong-naming-and-signed-packages
* Fix - Possible NullReferenceException in the AspNetCore clientside integration for length validators
* Fix - Don't clear the ModelValidatorProviders collection by default in the AspNetCore integration (added new ClearValidatorProviders property to control this behaviour)
* Fix - Ensure IValidatorFactory is resolved from request scope in asp.net core integration
* Fix - Property getter that throws an exception causes validation to fail in WebApi integration
* Fix - Issue in AspNetCore integration where we tried to resolve a collection validator in some situations where a class validator should be used
* Fix - Incorrect clientside validation attributes generated for email validator and credit card validator in the asp.net core integration
* Fix - Child model validation now works in webapi integration
* Improve splitting of PascalCased property names to support uppercase character sequences
* ValidationResult.ErrorCode property now always returns the type of the PropertyValidator that generated the message, unless it's been explicitly overriden

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 1,180 12/4/2019
8.5.1 194,138 11/2/2019
8.5.0 512,366 9/24/2019
8.5.0-preview5 23,822 9/1/2019
8.5.0-preview4 44,990 7/23/2019
8.5.0-preview3 23,804 7/10/2019
8.5.0-preview2 29,915 6/13/2019
8.5.0-preview1 32,659 5/10/2019
8.4.0 2,621,926 5/10/2019
8.3.0 305,829 4/24/2019
8.2.3 187,482 4/12/2019
8.2.2 294,005 4/5/2019
8.2.1 49,049 4/4/2019
8.2.0 297,546 3/26/2019
8.1.3 1,838,289 1/25/2019
8.1.2 777,304 12/18/2018
8.1.1 214,595 12/11/2018
8.1.0 145,989 12/6/2018
8.1.0-preview2 24,015 11/14/2018
8.1.0-preview1 23,898 10/14/2018
8.0.101 285,071 11/24/2018
8.0.100 1,426,197 9/4/2018
8.0.0 333,366 8/16/2018
8.0.0-rc1 32,647 7/24/2018
8.0.0-preview4 21,360 7/16/2018
8.0.0-preview3 20,268 7/13/2018
8.0.0-preview2 20,028 7/13/2018
7.6.105 255,792 8/11/2018
7.6.104 1,046,325 7/6/2018
7.6.103 471,690 6/16/2018
7.6.102 119,101 6/14/2018
7.6.101 43,075 6/13/2018
7.6.100 80,652 6/7/2018
7.6.0 185,106 6/1/2018
7.6.0-preview1 28,329 4/12/2018
7.5.2 1,340,534 3/16/2018
7.5.1 102,118 3/11/2018
7.5.0 349,744 2/26/2018
7.4.0 514,059 1/26/2018
7.3.4 425,249 1/2/2018
7.3.3 111,290 12/22/2017
7.3.2 37,707 12/21/2017
7.3.1 137,346 12/13/2017
7.3.0 27,287 12/13/2017
7.3.0-beta3 24,770 12/8/2017
7.3.0-beta2 33,206 11/20/2017
7.3.0-beta1 21,647 11/11/2017
7.2.1 1,065,574 10/24/2017
7.2.0 360,547 10/5/2017
7.2.0-beta3 36,949 9/5/2017
7.2.0-beta2 23,229 8/22/2017
7.2.0-beta1 20,273 8/19/2017
7.1.1 819,840 7/25/2017
7.1.0 269,953 6/28/2017
7.1.0-beta1 20,126 6/24/2017
7.0.3 204,471 6/7/2017
7.0.2 137,642 5/26/2017
7.0.1 53,563 5/23/2017
7.0.0 152,130 5/19/2017
7.0.0-beta3 23,920 5/1/2017
7.0.0-beta2 23,714 4/17/2017
7.0.0-beta1 21,246 4/7/2017
6.4.1 537,843 3/15/2017
6.4.1-beta1 21,002 3/13/2017
6.4.0 397,052 3/3/2017
6.4.0-rc4 141,691 2/13/2017
6.4.0-rc3 29,374 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 73,222 11/21/2016
6.4.0-beta8 43,953 10/31/2016
6.4.0-beta7 20,577 10/28/2016
6.4.0-beta6 20,989 10/25/2016
6.4.0-beta5 20,702 10/24/2016
6.4.0-beta4 20,719 10/21/2016
6.4.0-beta3 60,836 7/4/2016
6.4.0-beta2 21,552 7/1/2016
6.4.0-beta10 19,972 1/30/2017
6.4.0-beta1 23,584 6/28/2016
6.3.4-alpha 160,656 6/1/2016
6.3.3-alpha 20,388 5/27/2016
6.2.1 1,813,547 2/26/2016
6.2.1-beta1 24,143 2/24/2016
6.2.0 58,262 2/22/2016
6.2.0-beta1 20,408 2/12/2016
6.1.0 208,563 1/18/2016
6.0.2 78,693 1/5/2016
6.0.1 30,683 1/5/2016
6.0.0 54,170 12/22/2015
5.6.2 663,712 5/29/2015
5.6.1 25,736 5/29/2015
5.5.0 488,331 10/31/2014
5.4.0 282,409 7/3/2014
5.3.0 69,537 5/27/2014
5.2.0 41,612 5/21/2014
5.1.0 291,177 3/11/2014
5.0.0.1 172,525 10/24/2013
4.0.0.1 141,590 7/18/2013
4.0.0 79,615 4/29/2013
3.4.6 192,758 8/30/2012
3.4.0 43,580 8/17/2012
3.3.1 38,839 3/30/2012
3.2.0 51,853 11/14/2011
3.1.0 45,806 7/30/2011
3.0.0.1 22,121 7/5/2011
3.0.0 23,309 6/25/2011
2.0.0 35,510 1/9/2011
1.3.0 37,201 1/7/2011
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