FluentValidation 9.0.0-preview3 The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org. Prefix Reserved

.NET Standard 2.0 .NET Framework 4.6.1
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There is a newer version of this package available.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 9.0.0-preview3
dotnet add package FluentValidation --version 9.0.0-preview3
<PackageReference Include="FluentValidation" Version="9.0.0-preview3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentValidation --version 9.0.0-preview3
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: FluentValidation, 9.0.0-preview3"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install FluentValidation as a Cake Addin
#addin nuget:?package=FluentValidation&version=9.0.0-preview3&prerelease

// Install FluentValidation as a Cake Tool
#tool nuget:?package=FluentValidation&version=9.0.0-preview3&prerelease
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

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

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.6.1

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.

NuGet packages (1.2K)

Showing the top 5 NuGet packages that depend on FluentValidation:

Package Downloads
FluentValidation.AspNetCore The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

AspNetCore integration for FluentValidation

FluentValidation.DependencyInjectionExtensions The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Dependency injection extensions for FluentValidation

MicroElements.Swashbuckle.FluentValidation The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Swagger ISchemaFilter that uses FluentValidation validators instead System.ComponentModel based attributes.

FluentValidation.WebAPI The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

ASP.NET WebApi integration for FluentValidation

Ocelot

Ocelot is an API Gateway. The project is aimed at people using .NET running a micro services / service orientated architecture that need a unified point of entry into their system. In particular I want easy integration with IdentityServer reference and bearer tokens. reference tokens. Ocelot is a bunch of middlewares in a specific order. Ocelot manipulates the HttpRequest object into a state specified by its configuration until it reaches a request builder middleware where it creates a HttpRequestMessage object which is used to make a request to a downstream service. The middleware that makes the request is the last thing in the Ocelot pipeline. It does not call the next middleware. The response from the downstream service is stored in a per request scoped repository and retrived as the requests goes back up the Ocelot pipeline. There is a piece of middleware that maps the HttpResponseMessage onto the HttpResponse object and that is returned to the client. That is basically it with a bunch of other features.

GitHub repositories (131)

Showing the top 5 popular GitHub repositories that depend on FluentValidation:

Repository Stars
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
abpframework/abp
Open Source Web Application Framework for ASP.NET Core
dotnet-architecture/eShopOnWeb
Sample ASP.NET Core 6.0 reference application, powered by Microsoft, demonstrating a layered application architecture with monolithic deployment model. Download the eBook PDF from docs folder.
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
NancyFx/Nancy
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
Version Downloads Last updated
11.0.1 206,076 5/7/2022
11.0.0 126,536 4/30/2022
10.4.0 1,750,065 3/11/2022
10.3.6 4,714,660 12/13/2021
10.3.5 833,964 11/30/2021
10.3.4 2,692,185 10/22/2021
10.3.3 4,157,314 8/24/2021
10.3.1 295,093 8/19/2021
10.3.0 3,119,712 7/9/2021
10.2.3 3,345,864 6/3/2021
10.2.2 225,546 6/1/2021
10.2.1 441,718 5/30/2021
10.2.0 118,609 5/28/2021
10.1.0 2,290,762 4/28/2021
10.0.4 1,401,845 4/17/2021
9.5.4 1,415,078 4/5/2021
9.5.3 2,117,676 3/15/2021
9.5.2 911,546 3/8/2021
9.5.1 3,178,908 2/11/2021
9.5.0 1,510,503 1/31/2021
9.4.0 1,653,364 1/14/2021
9.3.0 7,248,604 11/10/2020
9.3.0-preview3 23,547 10/19/2020
9.3.0-preview2 107,730 9/15/2020
9.3.0-preview1 8,551 8/26/2020
9.2.2 4,121,449 9/20/2020
9.2.1 12,618 9/19/2020
9.2.0 4,555,358 8/26/2020
9.1.3 695,211 8/19/2020
9.1.2 534,972 8/12/2020
9.1.1 400,011 8/8/2020
9.1.0 24,744 8/8/2020
9.0.1 2,559,725 7/14/2020
9.0.0-preview5 64,168 5/23/2020
9.0.0-preview4 91,340 4/22/2020
9.0.0-preview3 129,277 2/29/2020
9.0.0-preview2 26,791 2/21/2020
9.0.0-preview1 63,188 2/8/2020
8.6.3 2,095,006 8/28/2020
8.6.2 15,723,408 2/29/2020
8.6.1 7,558,864 12/28/2019
8.6.0 2,822,166 12/4/2019
8.5.1 2,523,036 11/2/2019
8.5.0 3,605,978 9/24/2019
8.5.0-preview5 53,904 9/1/2019
8.5.0-preview4 77,702 7/23/2019
8.5.0-preview3 26,776 7/10/2019
8.5.0-preview2 49,217 6/13/2019
8.5.0-preview1 46,677 5/10/2019
8.4.0 9,408,001 5/10/2019
8.3.0 2,284,674 4/24/2019
8.2.3 475,121 4/12/2019
8.2.2 686,290 4/5/2019
8.2.1 235,629 4/4/2019
8.2.0 736,942 3/26/2019
8.1.3 3,887,457 1/25/2019
8.1.2 1,705,162 12/18/2018
8.1.1 470,717 12/11/2018
8.1.0 397,175 12/6/2018
8.1.0-preview2 26,588 11/14/2018
8.1.0-preview1 25,566 10/14/2018
8.0.101 556,718 11/24/2018
8.0.100 2,877,263 9/4/2018
8.0.0 713,820 8/16/2018
8.0.0-rc1 44,239 7/24/2018
8.0.0-preview4 22,513 7/16/2018
8.0.0-preview3 21,213 7/13/2018
8.0.0-preview2 21,000 7/13/2018
7.6.105 950,702 8/11/2018
7.6.104 1,979,339 7/6/2018
7.6.103 927,410 6/16/2018
7.6.102 204,772 6/14/2018
7.6.101 65,119 6/13/2018
7.6.100 143,524 6/7/2018
7.6.0 293,806 6/1/2018
7.6.0-preview1 37,496 4/12/2018
7.5.2 2,543,499 3/16/2018
7.5.1 183,728 3/11/2018
7.5.0 625,918 2/26/2018
7.4.0 989,170 1/26/2018
7.3.4 830,197 1/2/2018
7.3.3 157,321 12/22/2017
7.3.2 52,053 12/21/2017
7.3.1 242,057 12/13/2017
7.3.0 40,826 12/13/2017
7.3.0-beta3 25,632 12/8/2017
7.3.0-beta2 39,694 11/20/2017
7.3.0-beta1 22,613 11/11/2017
7.2.1 1,955,493 10/24/2017
7.2.0 639,507 10/5/2017
7.2.0-beta3 38,485 9/5/2017
7.2.0-beta2 24,450 8/22/2017
7.2.0-beta1 21,059 8/19/2017
7.1.1 1,374,193 7/25/2017
7.1.0 392,730 6/28/2017
7.1.0-beta1 20,869 6/24/2017
7.0.3 604,525 6/7/2017
7.0.2 211,984 5/26/2017
7.0.1 60,533 5/23/2017
7.0.0 357,770 5/19/2017
7.0.0-beta3 24,972 5/1/2017
7.0.0-beta2 24,540 4/17/2017
7.0.0-beta1 22,053 4/7/2017
6.4.1 1,014,496 3/15/2017
6.4.1-beta1 21,789 3/13/2017
6.4.0 671,090 3/3/2017
6.4.0-rc4 143,311 2/13/2017
6.4.0-rc3 33,056 2/3/2017
6.4.0-rc2 37,128 1/30/2017
6.4.0-rc1 20,920 1/30/2017
6.4.0-beta9 84,707 11/21/2016
6.4.0-beta8 47,717 10/31/2016
6.4.0-beta7 21,480 10/28/2016
6.4.0-beta6 21,895 10/25/2016
6.4.0-beta5 21,579 10/24/2016
6.4.0-beta4 21,611 10/21/2016
6.4.0-beta3 66,304 7/4/2016
6.4.0-beta2 22,481 7/1/2016
6.4.0-beta10 20,767 1/30/2017
6.4.0-beta1 24,714 6/28/2016
6.3.4-alpha 314,737 6/1/2016
6.3.3-alpha 21,159 5/27/2016
6.2.1 3,079,192 2/26/2016
6.2.1-beta1 25,292 2/24/2016
6.2.0 108,587 2/22/2016
6.2.0-beta1 21,286 2/12/2016
6.1.0 300,331 1/18/2016
6.0.2 95,473 1/5/2016
6.0.1 34,037 1/5/2016
6.0.0 83,393 12/22/2015
5.6.2 1,012,960 5/29/2015
5.6.1 28,368 5/29/2015
5.5.0 802,206 10/31/2014
5.4.0 476,766 7/3/2014
5.3.0 84,661 5/27/2014
5.2.0 59,133 5/21/2014
5.1.0 548,841 3/11/2014
5.0.0.1 289,381 10/24/2013
4.0.0.1 202,484 7/18/2013
4.0.0 93,627 4/29/2013
3.4.6 284,111 8/30/2012
3.4.0 55,611 8/17/2012
3.3.1 49,979 3/30/2012
3.2.0 59,568 11/14/2011
3.1.0 48,737 7/30/2011
3.0.0.1 23,530 7/5/2011
3.0.0 31,616 6/25/2011
2.0.0 48,049 1/9/2011
1.3.0 78,478 1/7/2011

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
* Added Slovenian translations of default error messages.
* Added WithMessageArgument to the test helpers.
* Add additional overload of SetValidator that takes a Func that receives the current property value.
* ASP.NET Core: FluentValidationModelValidatorProvider and FluentValidationModelValidator are now public.
* Work around a bug in ASP.NET Core's integration testing components that can cause ConfigureServices to run multiple times.
* SourceLink integration.
* {CollectionIndex} placeholder can now be accessed in child validators.

Full release notes can be found at https://github.com/FluentValidation/FluentValidation/blob/master/Changelog.txt
FluentValidation 8 is a major release. Please read the upgrade notes at https://fluentvalidation.net/upgrading-to-8

Changes in 8.6.2:
* Ensure CollectionIndex works in async workflow.

Changes in 8.6.1:
* Added explicit netcoreapp3.1 target to the ASP.NET Core integration.

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