FluentValidation 9.0.0-preview1

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

This is a prerelease version of FluentValidation.
Install-Package FluentValidation -Version 9.0.0-preview1
dotnet add package FluentValidation --version 9.0.0-preview1
<PackageReference Include="FluentValidation" Version="9.0.0-preview1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 9.0.0-preview1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

FluentValidation 9 is a major release. Please read the upgrade notes at https://docs.fluentvalidation.net/en/latest/upgrading-to-9.html

Changes in 9.0.0:

  • Removed support for netstandard1.1 and netstandard1.6
  • Default email validation mode now uses the same logic as ASP.NET Core. Previous regex behaviour is opt-in.
  • TestHelper advanced mode now has more features (see https://docs.fluentvalidation.net/en/latest/testing.html#advanced-test-extensions)
  • Equal/NotEqual now perform ordinal comparison when used with string properties
  • Severity can now be set dynamically with a callback
  • Removed WithLocalizedMessage (WithMessage that takes a callback is the replacement)
  • Removed ResourceName from ValidationFailure
  • Removed ResourceName and ResourceType from IStringSource.
  • Removed SetCollectionValidator which was deprecated in 8.0
  • Additional overload of OnAnyFailure that can receive a collection of validation failures
  • Remove DisplayAttribute integration and reference to DataAnnotations.
  • ComparisonProperty placeholder is now formatted like PropertyName
  • Translations of default error messages into other languages are now lazily-loaded

Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt

FluentValidation 9 is a major release. Please read the upgrade notes at https://docs.fluentvalidation.net/en/latest/upgrading-to-9.html

Changes in 9.0.0:

  • Removed support for netstandard1.1 and netstandard1.6
  • Default email validation mode now uses the same logic as ASP.NET Core. Previous regex behaviour is opt-in.
  • TestHelper advanced mode now has more features (see https://docs.fluentvalidation.net/en/latest/testing.html#advanced-test-extensions)
  • Equal/NotEqual now perform ordinal comparison when used with string properties
  • Severity can now be set dynamically with a callback
  • Removed WithLocalizedMessage (WithMessage that takes a callback is the replacement)
  • Removed ResourceName from ValidationFailure
  • Removed ResourceName and ResourceType from IStringSource.
  • Removed SetCollectionValidator which was deprecated in 8.0
  • Additional overload of OnAnyFailure that can receive a collection of validation failures
  • Remove DisplayAttribute integration and reference to DataAnnotations.
  • ComparisonProperty placeholder is now formatted like PropertyName
  • Translations of default error messages into other languages are now lazily-loaded

Full release notes can be found at https://github.com/JeremySkinner/FluentValidation/blob/master/Changelog.txt

Release Notes

FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8

Changes in 8.6.0:
* Add support for ASP.NET Core 3.1
* Fixed issue with property indexers being incorrectly stripped out when using test extensions.
* AddToModelState no longer includes a dot if PropertyName is null

Changes in 8.5.1:
* Ensure lazily loaded calls to WithMessage can be used for client-side validation, provided they don't attempt to access model properties from inside the delegate (eg when using IStringLocalizer).
* Fix issue where OnFailure didn't work properly when invoked on validators with conditions.

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

  • .NETFramework 4.6.1

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.

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Version History

Version Downloads Last updated
9.0.0-preview1 451 2/8/2020
8.6.1 381,035 12/28/2019
8.6.0 415,186 12/4/2019
8.5.1 540,928 11/2/2019
8.5.0 887,591 9/24/2019
8.5.0-preview5 31,899 9/1/2019
8.5.0-preview4 52,289 7/23/2019
8.5.0-preview3 24,494 7/10/2019
8.5.0-preview2 31,351 6/13/2019
8.5.0-preview1 35,310 5/10/2019
8.4.0 3,447,604 5/10/2019
8.3.0 384,780 4/24/2019
8.2.3 216,375 4/12/2019
8.2.2 339,448 4/5/2019
8.2.1 56,361 4/4/2019
8.2.0 347,252 3/26/2019
8.1.3 2,125,537 1/25/2019
8.1.2 864,565 12/18/2018
8.1.1 234,510 12/11/2018
8.1.0 163,493 12/6/2018
8.1.0-preview2 24,309 11/14/2018
8.1.0-preview1 24,587 10/14/2018
8.0.101 310,346 11/24/2018
8.0.100 1,557,398 9/4/2018
8.0.0 359,461 8/16/2018
8.0.0-rc1 32,967 7/24/2018
8.0.0-preview4 21,448 7/16/2018
8.0.0-preview3 20,340 7/13/2018
8.0.0-preview2 20,097 7/13/2018
7.6.105 288,578 8/11/2018
7.6.104 1,142,517 7/6/2018
7.6.103 508,443 6/16/2018
7.6.102 125,000 6/14/2018
7.6.101 47,145 6/13/2018
7.6.100 87,845 6/7/2018
7.6.0 199,531 6/1/2018
7.6.0-preview1 28,886 4/12/2018
7.5.2 1,430,526 3/16/2018
7.5.1 112,003 3/11/2018
7.5.0 385,955 2/26/2018
7.4.0 554,246 1/26/2018
7.3.4 460,559 1/2/2018
7.3.3 115,528 12/22/2017
7.3.2 39,139 12/21/2017
7.3.1 144,631 12/13/2017
7.3.0 28,305 12/13/2017
7.3.0-beta3 24,832 12/8/2017
7.3.0-beta2 34,442 11/20/2017
7.3.0-beta1 21,777 11/11/2017
7.2.1 1,137,013 10/24/2017
7.2.0 392,519 10/5/2017
7.2.0-beta3 37,074 9/5/2017
7.2.0-beta2 23,290 8/22/2017
7.2.0-beta1 20,317 8/19/2017
7.1.1 855,606 7/25/2017
7.1.0 278,329 6/28/2017
7.1.0-beta1 20,167 6/24/2017
7.0.3 212,612 6/7/2017
7.0.2 142,088 5/26/2017
7.0.1 54,132 5/23/2017
7.0.0 167,161 5/19/2017
7.0.0-beta3 23,974 5/1/2017
7.0.0-beta2 23,766 4/17/2017
7.0.0-beta1 21,289 4/7/2017
6.4.1 562,878 3/15/2017
6.4.1-beta1 21,054 3/13/2017
6.4.0 412,766 3/3/2017
6.4.0-rc4 141,947 2/13/2017
6.4.0-rc3 29,461 2/3/2017
6.4.0-rc2 36,233 1/30/2017
6.4.0-rc1 20,155 1/30/2017
6.4.0-beta9 73,848 11/21/2016
6.4.0-beta8 44,782 10/31/2016
6.4.0-beta7 20,706 10/28/2016
6.4.0-beta6 21,115 10/25/2016
6.4.0-beta5 20,822 10/24/2016
6.4.0-beta4 20,835 10/21/2016
6.4.0-beta3 61,239 7/4/2016
6.4.0-beta2 21,667 7/1/2016
6.4.0-beta10 20,014 1/30/2017
6.4.0-beta1 23,767 6/28/2016
6.3.4-alpha 175,791 6/1/2016
6.3.3-alpha 20,431 5/27/2016
6.2.1 1,895,069 2/26/2016
6.2.1-beta1 24,197 2/24/2016
6.2.0 62,885 2/22/2016
6.2.0-beta1 20,453 2/12/2016
6.1.0 215,815 1/18/2016
6.0.2 81,117 1/5/2016
6.0.1 32,056 1/5/2016
6.0.0 56,578 12/22/2015
5.6.2 688,372 5/29/2015
5.6.1 25,927 5/29/2015
5.5.0 517,155 10/31/2014
5.4.0 293,796 7/3/2014
5.3.0 70,497 5/27/2014
5.2.0 43,344 5/21/2014
5.1.0 303,314 3/11/2014
5.0.0.1 177,289 10/24/2013
4.0.0.1 145,913 7/18/2013
4.0.0 80,655 4/29/2013
3.4.6 196,481 8/30/2012
3.4.0 44,387 8/17/2012
3.3.1 39,093 3/30/2012
3.2.0 52,163 11/14/2011
3.1.0 46,053 7/30/2011
3.0.0.1 22,192 7/5/2011
3.0.0 24,009 6/25/2011
2.0.0 36,724 1/9/2011
1.3.0 38,082 1/7/2011