Question 1

How to validate nested structs with Gody?

Accepted Answer

Gody can validate nested structs by applying validation tags to nested fields, but for deeply nested structures, you may need to ensure the validator handles them properly, and custom rules might be required for complex relationships. The library's tag-based approach works recursively on struct fields.

Question 2

Gody vs go-playground/validator: which is better for Go?

Accepted Answer

Gody is lighter and more minimalistic, ideal for simple to moderate validation with a clean API, while go-playground/validator has a larger set of built-in rules and more community support but can be heavier. Choose Gody for performance and simplicity, or go-playground/validator for extensive features out of the box.

Question 3

How to add custom validation rules in Gody?

Accepted Answer

To add a custom rule, implement the gody.Rule interface and register it using validator.AddRules, similar to how built-in rules like rule.NotEmpty are added in the README example. This allows extending validation for specific business logic.

Question 4

Can Gody validate slices or arrays of data?

Accepted Answer

Yes, Gody can validate slices or arrays by applying validation to each element, either through struct tags on slice fields or by iterating and validating individual structs. However, built-in rules for slice-specific validations like length constraints might require custom rules.

Question 5

How to handle validation errors gracefully in Gody?

Accepted Answer

Gody returns a boolean and an error from validation functions; you can check the error for failure details, but error messages are basic. For user-friendly feedback, you might need to parse the error or implement custom rules with tailored error messages, as the library focuses on simplicity over detailed error handling.

Question 6

Is Gody suitable for validating JSON API requests in Go?

Accepted Answer

Yes, Gody is well-suited for validating JSON API requests, as shown in the HTTP handler example where struct tags define rules for incoming JSON bodies. Its declarative approach simplifies input validation in web APIs, though error response formatting may require additional code.

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