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Version: 0.1.2

Changelog

All notable changes to Pedantigo are documented here.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.1.0] - 2024-12-18​

Added​

Core Validation​

  • Struct tag-based validation with pedantigo:"..." tags
  • 100+ built-in validation constraints
  • Detailed error messages with field paths
  • Support for nested structs and slices
  • Unmarshal[T]() - Parse JSON and validate in one call
  • NewModel[T]() - Create validated instances from JSON, maps, or structs
  • Validate[T]() - Validate existing struct instances
  • Schema[T]() - Get cached JSON Schema
  • SchemaJSON[T]() - Get JSON Schema as bytes
  • Marshal[T]() - Validate and marshal to JSON
  • Dict[T]() - Convert struct to map

Validator API (Advanced)​

  • New[T]() - Create validator with custom options
  • ValidatorOptions - Configure strict mode, extra fields handling
  • MarshalOptions - Context-based field exclusion

JSON Schema Generation​

  • Automatic schema generation from struct tags
  • Built-in caching (240x speedup after first call)
  • OpenAPI-compatible schema generation
  • Thread-safe concurrent access

Streaming Validation​

  • NewStreamParser[T]() - Parse partial JSON from streams
  • Real-time validation for LLM responses
  • Automatic JSON repair for incomplete data

Discriminated Unions​

  • NewUnion[T]() - Type-safe union handling
  • Multiple discriminator field support
  • Automatic variant detection

Cross-Field Validation​

  • eqfield, nefield - Field equality comparisons
  • ltfield, lefield, gtfield, gefield - Field numeric comparisons
  • required_if, required_unless - Conditional requirements
  • Validatable interface for custom cross-field logic

Advanced Features​

  • SecretStr / SecretBytes - Safe handling of sensitive data
  • RegisterValidation() - Custom field validators
  • RegisterStructValidation[T]() - Custom struct validators
  • Context-based field exclusion for marshaling

String Constraints​

  • required, email, url, uuid, alpha, alphanumeric, numeric
  • minLength, maxLength, startswith, endswith, contains
  • pattern (regex), lowercase, uppercase, ascii
  • base64, hexadecimal, json, jwt, semver

Numeric Constraints​

  • min, max, gt, gte, lt, lte
  • positive, negative, nonnegative, nonpositive
  • multipleOf, divisibleBy

Format Constraints​

  • datetime, date, time, duration
  • ipv4, ipv6, cidr, mac
  • latitude, longitude
  • isbn, isbn10, isbn13
  • credit_card, ssn
  • country_code, currency_code, postal_code

Collection Constraints​

  • minItems, maxItems, unique
  • dive - Validate slice/array elements
  • keys, values - Validate map keys/values

[Unreleased]​

Performance​

  • sync.Pool for validation contexts - Reduced allocations during validation by reusing context buffers
  • Field constraint caching - Constraints are now built once at validator creation time, not on each validation call
  • Cross-field constraint optimization - Merged into cached field structure for faster lookups

Fixed​

  • Collection element validation - dive tag is now required to validate struct fields inside slices/maps (matches go-playground/validator behavior)
  • Empty ValidationError message - Now returns "no errors found" instead of confusing "validation failed"

Changed​

  • Removed unused internal validation package (internal cleanup, no API changes)

Planned​

  • Additional format validators
  • Extended OpenAPI support