FluentValidation 7.6.0-preview1

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

Showing the top 20 packages that depend on FluentValidation.

Packages Downloads
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
29
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
28
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
27
FastEndpoints
A light-weight REST Api framework for ASP.Net 8 and newer that implements REPR (Request-Endpoint-Response) Pattern.
27
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
25
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
24
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
23
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 that implements REPR (Request-Endpoint-Response) Pattern.
22
FastEndpoints
A light-weight REST Api framework for ASP.Net 6 and newer that implements REPR (Request-Endpoint-Response) Pattern.
22
FastEndpoints
A light-weight REST Api framework for ASP.Net 8 and newer that implements REPR (Request-Endpoint-Response) Pattern.
22

Changes in 7.5.2: * RuleSet method can now take multiple ruleset names by usinga comma-separated string. * Make setters on ValidationFailure's properties public to allow for easier deserialization. * Additional overload for OverridePropertyName that takes an expression. * Add overload of Include that takes a func to lazily create the inner validator. * Make error code resolution pluggable using ValidatorOptions.ErrorCodeResolver Changes in 7.5.1: * Resolved issues with referencing FluentValidation from legacy PCLs. * Added support for CustomizeValidatorAttribute to the legacy WebApi integration for consistency with MVC5 and AspNetCore. Changes in 7.6: * Update ASP.NET Core integration to ASP.NET Core 2.1 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/Brazilian Portuguese) * Cache display names by default * Ensure ShouldHaveChildValidator test method works with model-level rules * Removed netstandard1.0 support. Supported platforms are now netstandard1.1, netstandard2.0 and net45. 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

Version Downloads Last updated
12.1.1 16 12/4/2025
12.1.0 12 11/5/2025
12.0.0 27 5/8/2025
12.0.0-preview1 35 2/18/2025
11.12.0 19 11/5/2025
11.11.0 34 2/19/2025
11.10.0 38 10/1/2024
11.9.2 35 7/20/2024
11.9.1 46 5/3/2024
11.9.0 45 3/8/2024
11.8.1 47 3/8/2024
11.8.0 41 3/8/2024
11.7.1 47 3/8/2024
11.7.0 37 3/8/2024
11.6.0 42 2/27/2024
11.5.2 48 3/8/2024
11.5.1 42 3/8/2024
11.5.0 39 3/6/2024
11.4.0 47 3/8/2024
11.3.0 49 3/8/2024
11.2.2 44 3/8/2024
11.2.1 37 3/8/2024
11.2.0 48 2/12/2024
11.1.1 39 3/8/2024
11.1.0 43 3/3/2024
11.0.3 51 3/8/2024
11.0.2 38 3/8/2024
11.0.1 43 3/2/2024
11.0.0 43 2/27/2024
10.4.0 40 2/26/2024
10.3.6 40 3/8/2024
10.3.5 37 3/8/2024
10.3.4 38 3/8/2024
10.3.3 41 3/8/2024
10.3.1 45 3/8/2024
10.3.0 40 2/11/2024
10.2.3 46 3/8/2024
10.2.2 39 3/1/2024
10.2.1 41 3/2/2024
10.2.0 39 2/10/2024
10.1.0 43 3/8/2024
10.0.4 46 3/7/2024
9.5.4 46 3/8/2024
9.5.3 43 3/8/2024
9.5.2 45 3/8/2024
9.5.1 42 3/8/2024
9.5.0 44 3/8/2024
9.4.0 52 3/8/2024
9.3.0 45 2/28/2024
9.3.0-preview3 40 2/27/2024
9.3.0-preview2 45 4/12/2022
9.3.0-preview1 40 3/8/2024
9.2.2 67 3/8/2024
9.2.1 41 3/8/2024
9.2.0 56 2/11/2024
9.1.3 37 3/1/2024
9.1.2 43 2/10/2024
9.1.1 42 2/21/2024
9.1.0 50 3/1/2024
9.0.1 49 3/8/2024
9.0.0-preview5 42 3/8/2024
9.0.0-preview4 50 3/8/2024
9.0.0-preview3 41 3/8/2024
9.0.0-preview2 40 3/8/2024
9.0.0-preview1 37 3/8/2024
8.6.3 48 3/8/2024
8.6.2 44 3/8/2024
8.6.1 44 3/8/2024
8.6.0 41 2/23/2024
8.5.1 44 2/23/2024
8.5.0 47 3/4/2024
8.5.0-preview5 46 3/8/2024
8.5.0-preview4 34 3/8/2024
8.5.0-preview3 44 3/8/2024
8.5.0-preview2 36 3/8/2024
8.5.0-preview1 50 3/8/2024
8.4.0 43 3/8/2024
8.3.0 42 3/8/2024
8.2.3 35 3/8/2024
8.2.2 44 3/8/2024
8.2.1 38 3/8/2024
8.2.0 46 3/8/2024
8.1.3 45 3/8/2024
8.1.2 39 3/8/2024
8.1.1 39 2/10/2024
8.1.0 45 3/4/2024
8.1.0-preview2 41 3/8/2024
8.1.0-preview1 43 3/8/2024
8.0.101 46 3/8/2024
8.0.100 42 3/8/2024
8.0.0 35 3/5/2024
8.0.0-rc1 45 3/8/2024
8.0.0-preview4 44 3/8/2024
8.0.0-preview3 49 3/8/2024
8.0.0-preview2 42 2/29/2024
7.6.105 53 3/8/2024
7.6.104 44 3/8/2024
7.6.103 48 3/8/2024
7.6.102 49 3/8/2024
7.6.101 40 3/3/2024
7.6.100 47 3/8/2024
7.6.0 49 3/8/2024
7.6.0-preview1 45 3/8/2024
7.5.2 37 3/8/2024
7.5.1 38 2/24/2024
7.5.0 49 3/8/2024
7.4.0 43 3/7/2024
7.3.4 36 3/8/2024
7.3.3 37 3/8/2024
7.3.2 43 3/8/2024
7.3.1 40 3/8/2024
7.3.0 49 3/8/2024
7.3.0-beta3 41 3/8/2024
7.3.0-beta2 41 3/8/2024
7.3.0-beta1 41 3/8/2024
7.2.1 35 3/8/2024
7.2.0 39 2/26/2024
7.2.0-beta3 41 3/8/2024
7.2.0-beta2 38 3/8/2024
7.2.0-beta1 37 3/8/2024
7.1.1 37 3/8/2024
7.1.0 54 3/8/2024
7.1.0-beta1 40 3/8/2024
7.0.3 50 3/8/2024
7.0.2 38 3/8/2024
7.0.1 46 3/8/2024
7.0.0 41 3/8/2024
7.0.0-beta3 36 3/8/2024
7.0.0-beta2 36 3/8/2024
7.0.0-beta1 44 3/8/2024
6.4.1 40 3/8/2024
6.4.1-beta1 45 3/8/2024
6.4.0 41 3/8/2024
6.4.0-rc4 48 3/8/2024
6.4.0-rc3 43 3/8/2024
6.4.0-rc2 46 3/8/2024
6.4.0-rc1 41 3/8/2024
6.4.0-beta9 37 3/8/2024
6.4.0-beta8 45 3/8/2024
6.4.0-beta7 40 3/8/2024
6.4.0-beta6 36 3/8/2024
6.4.0-beta5 41 3/8/2024
6.4.0-beta4 42 3/8/2024
6.4.0-beta3 49 3/8/2024
6.4.0-beta2 47 3/8/2024
6.4.0-beta10 47 3/8/2024
6.4.0-beta1 37 3/8/2024
6.3.4-alpha 37 3/2/2024
6.3.3-alpha 38 3/8/2024
6.2.1 42 3/8/2024
6.2.1-beta1 42 3/8/2024
6.2.0 40 3/8/2024
6.2.0-beta1 37 3/8/2024
6.1.0 47 3/8/2024
6.0.2 46 3/8/2024
6.0.1 43 3/8/2024
6.0.0 43 3/8/2024
5.6.2 41 3/8/2024
5.6.1 44 3/8/2024
5.5.0 35 3/8/2024
5.4.0 44 3/2/2024
5.3.0 46 3/8/2024
5.2.0 50 3/8/2024
5.1.0 47 3/6/2024
5.0.0.1 38 2/11/2024
4.0.0.1 41 2/10/2024
4.0.0 37 3/8/2024
3.4.6 45 3/8/2024
3.4.0 39 3/8/2024
3.3.1 39 3/8/2024
3.2.0 42 3/3/2024
3.1.0 47 3/8/2024
3.0.0.1 42 2/10/2024
3.0.0 43 3/8/2024
2.0.0 42 3/8/2024
1.3.0 44 3/8/2024