validation

Validation Package Examples

This directory contains examples demonstrating how to use the validation package, which provides utilities for validating data in Go applications. The package offers a structured way to perform validations, collect validation errors, and report them in a consistent format.

Examples

1. Basic Validation Example

basic_validation_example.go

Demonstrates basic validation functions for strings.

Key concepts:

• Creating a validation result
• Using Required to validate that a value is not empty
• Using MinLength and MaxLength to validate string length
• Using Pattern to validate that a string matches a regular expression
• Checking if validation passed with IsValid()

2. Date Validation Example

date_validation_example.go

Shows how to validate dates and date ranges.

Key concepts:

• Using PastDate to validate that a date is in the past
• Using ValidDateRange to validate that a start date is before an end date
• Handling validation errors for dates

3. Collection Validation Example

collection_validation_example.go

Demonstrates validation of collections (slices).

Key concepts:

• Using AllTrue to check if all items in a collection satisfy a condition
• Using ValidateAll to validate each item in a collection individually
• Handling validation errors for collections
• Validating different types of collections (strings, numbers)

4. Custom Validation Example

custom_validation_example.go

Shows how to create custom validation for a struct.

Key concepts:

• Creating a validation function for a custom struct
• Combining multiple validators for complex validation rules
• Using ValidateID for ID validation
• Adding custom validation logic
• Returning validation errors as a standard error

Running the Examples

To run any of the examples, use the go run command:

go run examples/validation/basic_validation_example.go

Additional Resources

For more information about the validation package, see the validation package documentation.