FluentValidation 8.1.0-preview2

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.AspNetCore
AspNetCore integration for FluentValidation
183
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
187
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
195
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
199
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
214
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
220
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
434
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
778
FluentValidation.AspNetCore
AspNetCore integration for FluentValidation
1,191
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
184
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
209
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
239
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
442
FluentValidation.DependencyInjectionExtensions
Dependency injection extensions for FluentValidation
525
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
221
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
238
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
307
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
597
RulesEngine
Rules Engine is a package for abstracting business logic/rules/policies out of the system. This works in a very simple way by giving you an ability to put your rules in a store outside the core logic of the system thus ensuring that any change in rules doesn't affect the core system.
703

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

Version Downloads Last updated
12.1.1 263 12/04/2025
12.1.0 253 11/04/2025
12.0.0 380 05/06/2025
12.0.0-preview1 136 01/03/2025
11.12.0 113 11/07/2025
11.11.0 379 11/20/2024
11.10.0 410 09/20/2024
11.9.2 298 06/27/2024
11.9.1 163 07/22/2024
11.9.0 321 02/05/2024
11.8.1 200 07/22/2024
11.8.0 166 07/22/2024
11.7.1 143 07/22/2024
11.7.0 150 07/22/2024
11.6.0 169 07/22/2024
11.5.2 156 07/22/2024
11.5.1 316 02/04/2024
11.5.0 156 07/22/2024
11.4.0 156 07/17/2024
11.3.0 177 02/04/2024
11.2.2 161 07/22/2024
11.2.1 169 07/22/2024
11.2.0 164 07/22/2024
11.1.1 152 07/22/2024
11.1.0 161 07/13/2024
11.0.3 168 07/22/2024
11.0.2 158 07/22/2024
11.0.1 152 07/22/2024
11.0.0 166 07/22/2024
10.4.0 266 02/04/2024
10.3.6 151 07/22/2024
10.3.5 139 07/22/2024
10.3.4 171 07/17/2024
10.3.3 165 07/17/2024
10.3.1 171 07/22/2024
10.3.0 152 05/29/2024
10.2.3 175 07/22/2024
10.2.2 155 07/22/2024
10.2.1 142 07/22/2024
10.2.0 155 07/22/2024
10.1.0 161 07/22/2024
10.0.4 178 07/22/2024
9.5.4 174 07/22/2024
9.5.3 154 07/22/2024
9.5.2 167 07/22/2024
9.5.1 150 07/22/2024
9.5.0 171 02/09/2024
9.4.0 162 07/22/2024
9.3.0 168 07/22/2024
9.3.0-preview3 169 07/22/2024
9.3.0-preview2 154 07/22/2024
9.3.0-preview1 190 07/22/2024
9.2.2 156 07/22/2024
9.2.1 152 07/18/2024
9.2.0 146 07/22/2024
9.1.3 172 07/22/2024
9.1.2 155 07/22/2024
9.1.1 150 07/22/2024
9.1.0 157 07/22/2024
9.0.1 167 07/22/2024
9.0.0-preview5 168 07/22/2024
9.0.0-preview4 145 07/22/2024
9.0.0-preview3 164 07/22/2024
9.0.0-preview2 145 07/22/2024
9.0.0-preview1 155 07/22/2024
8.6.3 164 07/22/2024
8.6.2 157 07/22/2024
8.6.1 149 07/22/2024
8.6.0 161 07/22/2024
8.5.1 155 07/21/2024
8.5.0 160 07/18/2024
8.5.0-preview5 160 07/22/2024
8.5.0-preview4 162 07/22/2024
8.5.0-preview3 160 07/22/2024
8.5.0-preview2 175 07/22/2024
8.5.0-preview1 152 07/22/2024
8.4.0 171 07/22/2024
8.3.0 165 07/22/2024
8.2.3 154 07/22/2024
8.2.2 155 07/22/2024
8.2.1 159 07/22/2024
8.2.0 164 07/22/2024
8.1.3 175 07/22/2024
8.1.2 152 07/22/2024
8.1.1 151 07/22/2024
8.1.0 177 07/22/2024
8.1.0-preview2 162 07/22/2024
8.1.0-preview1 163 07/22/2024
8.0.101 165 07/22/2024
8.0.100 149 07/17/2024
8.0.0 153 07/22/2024
8.0.0-rc1 164 07/22/2024
8.0.0-preview4 151 07/22/2024
8.0.0-preview3 158 07/22/2024
8.0.0-preview2 165 07/22/2024
7.6.105 145 07/22/2024
7.6.104 155 07/22/2024
7.6.103 152 07/22/2024
7.6.102 156 07/22/2024
7.6.101 156 07/22/2024
7.6.100 159 07/22/2024
7.6.0 167 07/22/2024
7.6.0-preview1 169 07/22/2024
7.5.2 150 07/22/2024
7.5.1 152 06/21/2024
7.5.0 162 07/22/2024
7.4.0 168 07/22/2024
7.3.4 151 07/22/2024
7.3.3 166 07/22/2024
7.3.2 153 07/22/2024
7.3.1 155 07/22/2024
7.3.0 156 07/22/2024
7.3.0-beta3 169 07/22/2024
7.3.0-beta2 163 07/22/2024
7.3.0-beta1 174 07/22/2024
7.2.1 161 07/22/2024
7.2.0 151 07/22/2024
7.2.0-beta3 151 07/22/2024
7.2.0-beta2 163 07/22/2024
7.2.0-beta1 184 07/22/2024
7.1.1 150 07/22/2024
7.1.0 144 07/22/2024
7.1.0-beta1 156 07/22/2024
7.0.3 158 07/22/2024
7.0.2 150 07/22/2024
7.0.1 168 07/22/2024
7.0.0 149 07/22/2024
7.0.0-beta3 157 07/22/2024
7.0.0-beta2 161 07/22/2024
7.0.0-beta1 142 07/22/2024
6.4.1 174 07/22/2024
6.4.1-beta1 189 07/22/2024
6.4.0 161 07/22/2024
6.4.0-rc4 189 07/22/2024
6.4.0-rc3 155 07/22/2024
6.4.0-rc2 169 07/22/2024
6.4.0-rc1 169 07/22/2024
6.4.0-beta9 199 07/22/2024
6.4.0-beta8 197 07/22/2024
6.4.0-beta7 159 07/22/2024
6.4.0-beta6 175 07/22/2024
6.4.0-beta5 175 07/22/2024
6.4.0-beta4 171 07/22/2024
6.4.0-beta3 167 07/22/2024
6.4.0-beta2 165 07/22/2024
6.4.0-beta10 179 07/22/2024
6.4.0-beta1 143 07/22/2024
6.3.4-alpha 168 07/22/2024
6.3.3-alpha 150 07/22/2024
6.2.1 159 07/22/2024
6.2.1-beta1 161 07/22/2024
6.2.0 153 07/22/2024
6.2.0-beta1 163 07/22/2024
6.1.0 161 07/22/2024
6.0.2 147 07/22/2024
6.0.1 161 07/22/2024
6.0.0 158 07/22/2024
5.6.2 160 07/22/2024
5.6.1 156 07/22/2024
5.5.0 168 07/22/2024
5.4.0 162 07/22/2024
5.3.0 163 07/21/2024
5.2.0 157 07/22/2024
5.1.0 167 07/22/2024
5.0.0.1 153 07/22/2024
4.0.0.1 161 07/22/2024
4.0.0 170 07/22/2024
3.4.6 149 07/22/2024
3.4.0 186 07/22/2024
3.3.1 178 07/22/2024
3.2.0 171 07/22/2024
3.1.0 164 07/22/2024
3.0.0.1 147 07/22/2024
3.0.0 175 07/22/2024
2.0.0 146 07/22/2024
1.3.0 163 07/22/2024