go-validator/validator
Validator
This project is a data validation framework for the Go programming language that enforces integrity by applying declarative constraints to struct fields. It utilizes reflection to inspect data structures at runtime, mapping field-level requirements defined in struct tags to specific validation logic.
The library distinguishes itself through its ability to handle complex object graphs by recursively traversing nested structures and slices. It supports context-aware validation, allowing developers to switch between different rule sets for the same data structure based on application state or specific requirements.
Beyond standard field checks, the framework provides a registry-based system for defining custom validation functions. This allows for the integration of specialized business logic to handle complex data verification tasks, such as sanitizing incoming API request payloads or enforcing unique constraints across an application.
Features
- Data Validation Frameworks - Provides a framework for verifying application data against predefined business logic requirements and complex field-level constraints.
- Go Validation Libraries - Enforces data integrity by applying declarative constraints and custom validation rules to struct fields using tags.
- Struct Tag Validators - Checks data fields against predefined constraints using tags to ensure that all values meet specific business logic requirements.
- Custom Field Validation - Registers custom functions to perform specialized checks on data fields that go beyond standard validation requirements.
- Contextual Validation Groups - Applies different sets of validation rules to the same data structure depending on the specific application state or user role requirements.
- Reflection-Based Field Matchers - Traverses object hierarchies dynamically to access and evaluate field values against defined validation rules without manual boilerplate.
- Data Sanitization Utilities - Validates incoming data payloads in web services to ensure that all fields conform to expected formats before processing.
- Context-Aware Validation - Supports multiple validation rule sets for the same data structure based on application state or context.
- Custom Validation Functions - Extends validation capabilities by defining user-provided functions that apply specialized data checks to fields.
- Function Registries - Maintains a central lookup table of validation functions that allows developers to register and invoke custom business rules.
- Struct Tags - Uses reflection to parse custom struct tags at runtime, mapping field constraints to specific validation logic.
- Recursive Struct Traversal - Walks through nested data structures and slices to apply validation rules to every element within a complex object graph.
- Field Constraints - Applies declarative rules to data structures to ensure that all values meet specific criteria such as length, range, or pattern matching.
- Pluggable Rule Sets - Configures multiple validation rule sets for the same data structure to apply different constraints based on application state.
- Custom Logic Validation - Extends standard data verification by registering specialized functions to handle complex business rules that go beyond basic checks.
