FluentValidation 7.6.102

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
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
6
FluentValidation.ValidatorAttribute
A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.
3
FluentValidation.Mvc5
ASP.NET MVC 5 integration for FluentValidation
3
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
2
FluentValidation.ValidatorAttribute
A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.
2
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
1
FluentValidation.Mvc5
ASP.NET MVC 5 integration for FluentValidation
1

Changes in 7.6.102: Fixed a regression where calling ValidateAsync with RuleForEach would no longer execute tasks sequentially (#799).

Changes in 7.6.101: Added support for RuleForEach to the testing extensions (#238). Fixed a regression where calling ValidateAsync with RuleForEach could cause a deadlock (#799). Added ToString overrides on ValidationResult to generate a string representation of all errors (#778). Updated logos thanks to Dylan Beattie (#780).

Changes in 7.6.100: Resolved an issue where ValidateAsync was called on child validators when the root validator was invoked synchronously.

Changes in 7.6:

  • WhenAsync now works correctly when calling the non-async Validate method.
  • ASP.NET Core integration has been updated to ASP.NET Core 2.1.
  • Include statement now works when explicitly selecting properties to validate.
  • Added Ukranian language support.
  • Added Arabic language support.
  • Added caching when instantiating validators to obtain clientside metadata.

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 7.5:

  • 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

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8.1.0-preview1 2 11/07/2025
8.0.101 2 11/07/2025
8.0.100 2 11/07/2025
8.0.0 2 11/07/2025
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8.0.0-preview4 1 11/07/2025
8.0.0-preview3 1 11/07/2025
8.0.0-preview2 1 11/07/2025
7.6.105 1 11/07/2025
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7.6.103 1 11/07/2025
7.6.102 1 11/07/2025
7.6.101 1 11/07/2025
7.6.100 1 11/07/2025
7.6.0 1 11/07/2025
7.6.0-preview1 1 11/07/2025
7.5.2 1 11/07/2025
7.5.1 1 11/07/2025
7.5.0 1 11/07/2025
7.4.0 2 11/07/2025
7.3.4 2 11/07/2025
7.3.3 2 11/07/2025
7.3.2 1 11/07/2025
7.3.1 1 11/07/2025
7.3.0 1 11/07/2025
7.3.0-beta3 1 11/07/2025
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7.3.0-beta1 2 11/07/2025
7.2.1 1 11/07/2025
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7.1.1 1 11/07/2025
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7.0.3 2 11/07/2025
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7.0.0 2 11/07/2025
7.0.0-beta3 1 11/07/2025
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6.4.1 1 11/07/2025
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6.4.0-rc4 2 11/07/2025
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6.4.0-rc1 1 11/07/2025
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6.2.0 1 11/07/2025
6.2.0-beta1 1 11/07/2025
6.1.0 1 11/07/2025
6.0.2 2 11/07/2025
6.0.1 1 11/07/2025
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5.6.2 1 11/07/2025
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