GO Validator

This is a package, to ease the Validation process of Data with many kind of validation methods. It returns An error list which is a representation of key value pair of errors similar to Rails.

The Error list can be used independent of the Validate. ErrorList itself has some methods that eases up Searching for errors on key and to Add/Append Errors.

###Validate

####Usage

	var validator = el.Validate{}
	validator.MaxLengthOfString("phone", 50, "00919999999999")
	validator.MatchRegExp("phone", "^([0-9])+$", "00919999999999")

Parameters:

The First Parameter is always the :key to be used to log errors against

Output:

Errors are a list of error objects []error, and iss appended to the Validate object.

####Sample

This is how Validator looks like if the above Validations fail

Validate{
  ErrorList{
  	Errors: []KeyErrors{
  		{
  			Field: "phone",
  			Errors: []error{
  				error.New("phone: Max allowed length is 20 Characters, found 50")
  				error.New("phone: Format not correct")
  			},
  	},
  },
}

####Passing Accross Objects

// type Params struct

func (p *Params) Validate() *el.ErrorList {
	var validator = el.Validate{}
	p.User.Validate(&validator)
	p.Education.Validate(&validator)
	return &validator.ErrorList
}

// type User struct

func (p User) Validate(validator *el.Validate) {
	validator.MaxLengthOfString("phone", 50, p.Phone)
	validator.MatchRegExp("phone", "^([0-9])+$", p.Phone)
}

// type Education struct

func (p Education) Validate(validator *el.Validate) {
	validator.MaxLengthOfString("course_name", 60, p.Firstname)
	validator.MaxLengthOfString("course_email", 50, p.Email)
	validator.MatchEmail("course_email", p.Email)
}

All errors will be added to the same Validate object and you can use the validate.ErrorList object to use the errors.

###ErrorList

You can use ErrorList without using Validate.

####Usage

To add a new key and error, and to add more errors on to the same key, use method Append

errList := ErrorList{}
errList.Append("key", error.New("Error Message"))

To find a key and its Errors, use method Find. It returns an error as second parameter if the Key is not found.

errList.Find("key") // returns: KeyError, error(if Key not found, else nil)

To find index of a key and its Errors, use method FindIndex. It returns an error as second parameter if the Key is not found.

errList.FindIndex("key") // return: Index of KeyError in ErrorList, error(if Key not found, else nil)

sumitasok/govalidator

GO Validator