Validation

Rue includes a built-in validator for struct validation using tags.

Usage

type CreateUser struct {
    Name  string `json:"name" validate:"required"`
    Email string `json:"email" validate:"required,email"`
    Age   int    `json:"age" validate:"min=18,max=120"`
    Role  string `json:"role" validate:"oneof=admin user guest"`
}

r.POST("/users", func(c *rue.Context) {
    var user CreateUser
    if err := c.BindJSON(&user); err != nil {
        c.AbortWithStatus(http.StatusBadRequest)
        return
    }
    
    if err := c.Validate(&user); err != nil {
        c.JSON(http.StatusBadRequest, rue.H{"errors": err})
        return
    }
    
    c.JSON(http.StatusCreated, user)
})

Validation Rules

Rule	Description	Example
`required`	Field must not be empty	`validate:"required"`
`min=N`	Minimum value/length	`validate:"min=18"`
`max=N`	Maximum value/length	`validate:"max=100"`
`len=N`	Exact length	`validate:"len=10"`
`email`	Valid email format	`validate:"email"`
`url`	Valid URL format	`validate:"url"`
`regex=pattern`	Match regex	`validate:"regex=^[a-z]+$"`
`oneof=a b c`	One of values	`validate:"oneof=admin user"`