fluentvalidation-patterns

What problem does it solve?

This skill provides reusable FluentValidation patterns tailored for the ABP framework to streamline input DTO validation, enabling async checks, repository existence validation, conditional rules, localization, and custom validators across modules.

Core Features & Use Cases

• Async validation patterns: common MustAsync rules against repositories to enforce data integrity during Create/Update flows.
• Conditional & complex rules: When/Unless scenarios and multi-condition validations across DTOs.
• Localization-ready messages: Integrates with ABP localization resources for user-friendly error messages.
• Reusable custom validators: Extensible validators and extension methods for cross-cutting validation concerns.
• ABP integration: How to wire validators into the ABP module and auto-register across application services.

Quick Start

Create a CreateUpdateUserDtoValidator that demonstrates NotEmpty, EmailAddress, and an async uniqueness check using IRepository<User, Guid>. Register validators in the ApplicationModule by scanning the assembly and enable FluentValidation auto-validation so incoming DTOs are validated automatically.