FluentValidation/FluentValidation
FluentValidation
FluentValidation is a .NET validation library used to define strongly-typed validation rules for objects. It utilizes a fluent interface API and lambda expressions to ensure data integrity for classes and properties within the .NET type system.
The library separates validation logic from business entities to keep domain models focused on core functionality. This approach enables the enforcement of business logic and the sanitization of input data or API payloads through a sequence of logic checks.
The system supports complex validation surface areas, including the ability to nest validators for recursive validation of object graphs and the integration of custom validator classes. Rules are constructed via method chaining for readability and executed only when a validation request is triggered.
Features
- Validation Rules - Provides a comprehensive system for defining and enforcing strict data constraints on class properties.
- Fluent Interfaces - Uses a fluent interface pattern to construct readable and maintainable validation rule chains via method chaining.
- Strongly-Typed Validators - Implements strongly-typed validators for .NET objects to ensure data integrity through the type system.
- Data Validation Libraries - Serves as a primary .NET library for defining strongly-typed validation rules using a fluent API.
- Fluent Interfaces - Employs the fluent interface architectural pattern to allow chained method calls for an expressive validation API.
- Expression-Based Property Selection - Utilizes typed lambda expressions to map validation rules to properties, ensuring compile-time safety.
- Input Sanitization - Enables the sanitization and validation of user input and API payloads before they enter the system.
- Custom Validators - Allows the integration of custom validator classes and functions to implement domain-specific validation logic.
- Recursive Object Validation - Provides recursive validation of complex object graphs to ensure structural integrity across nested class hierarchies.
- Validation Logic Decoupling - Separates validation logic from business entities to maintain clean domain models focused on core functionality.
- General Utilities - Fluent interface for defining complex validation rules.
