ABP Validation Skill

What problem does it solve?

ABP input validation fails inconsistently across DTOs and services, making it hard to enforce rules and return uniform, structured validation errors to clients.

Core Features & Use Cases

• Data Annotation validation on DTOs for declarative rules like required fields and string/number constraints.
• IValidatableObject for DTO-level custom validation when logic is tightly coupled to the DTO shape.
• FluentValidation + ABP auto-discovery to implement richer, cross-property validation rules in validator classes.
• IValidationEnabled interception to enforce validation automatically on DI-registered services, including the correct requirements for virtual methods.
• Standardized error handling via AbpValidationException and validationErrors JSON for reliable HTTP 400 responses.

Real-world use case: Validate Create/Update DTOs for an ABP application service so that invalid input (missing required fields, out-of-range numbers, or inconsistent property combinations) returns a consistent 400 response with field-level validationErrors.

Quick Start

Ask an AI to generate an ABP v10.4 DTO with Data Annotations plus a FluentValidation validator and explain how AbpValidationException will produce the correct validationErrors response.