Question 1

How to validate nested structs in Govalidator?

Accepted Answer

Use struct tags on nested fields, and Govalidator will recursively validate them with ValidateStruct. For maps, use ValidateMap with a nested template.

Question 2

Govalidator vs go-playground/validator which is better?

Accepted Answer

Govalidator offers more built-in validators and sanitization functions, while go-playground/validator is leaner and more focused on struct validation. Choose Govalidator if you need extras like string cleaning.

Question 3

How to add a custom validator tag in Govalidator?

Accepted Answer

Define a function with the signature func(interface{}, interface{}) bool, then register it using CustomTypeTagMap.Set, as shown in the breaking changes section for data race prevention.

Question 4

Does Govalidator check if an email exists or just the format?

Accepted Answer

It only validates the format with IsEmail; for existence checking, you need to implement custom logic or use external services, as IsExistingEmail isn't built-in.

Question 5

How to handle validation errors per field in an API response?

Accepted Answer

Use ErrorsByField to get a map of field names to error messages, then format them into your API response for detailed client feedback.

Question 6

Can Govalidator validate JSON schema or just JSON strings?

Accepted Answer

It only validates if a string is valid JSON format with IsJSON, not against a schema. For schema validation, you'd need additional libraries.

govalidator

What is govalidator?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions