How to Use Struct Tags in Go (json, db, yaml, validate)

Structs Enums

2026-04-17T12:05:42+00:00

Add backtick-quoted key-value pairs to Go struct fields to control JSON, database, and validation behavior.

Use struct tags by appending a backtick-quoted string to a struct field definition to control serialization and validation behavior for that specific field.

type User struct {
    ID   int    `json:"id" db:"user_id" validate:"required,min=1"`
    Name string `json:"name" db:"full_name" validate:"required,max=100"`
    Age  int    `json:"age,omitempty" db:"age" validate:"min=0,max=150"`
}