Validation

Totoval validation uses gopkg.in/go-playground/validator.v9.

Request Validation

Request validation file should be placed at app/http/requests folder. And used at app/http/controllers.
Here’s a request validation file example for validate user login request:

package requests

type UserLogin struct {
	Email    string `json:"email" binding:"required,email"`
	Password string `json:"password" binding:"required,min=8,max=24"`
}

Using at controllers:

func (l *Login) Login(c *request.Context) {
	// validate and assign requestData
	var requestData requests.UserLogin
	if !l.Validate(c, &requestData, true) {
		return
	}
	
    ...
	...
}

All the controller’s should embedded with BaseController, and BaseController has defined a Validate function, by using Validate function, Totoval use the request validation struct to validate the request data.
If this function returns false, then you should directly return in the controller, and that will cause a http 422 error with the error message.

Model Validation

type User struct {
	ID        *uint      `gorm:"column:user_id;primary_key;auto_increment" validate:"omitempty"`
	Name      *string    `gorm:"column:user_name;type:varchar(100)" validate:"required"`
	Email     *string    `gorm:"column:user_email;type:varchar(100);unique_index;not null" validate:"required"`
	Password  *string    `gorm:"column:user_password;type:varchar(100);not null" validate:"required"`
	CreatedAt *zone.Time `gorm:"column:user_created_at"`
	UpdatedAt zone.Time  `gorm:"column:user_updated_at"`
	DeletedAt *zone.Time `gorm:"column:user_deleted_at"`
	model.BaseModel
}

When using helper function m.H().Create() and m.H().Save() in package github.com/totoval/framework/helpers/m, the structData passed into the function will be validated using the struct’s validate tag.