Fs02/grimoire

package changeset

import (
    "strings"

    "github.com/Fs02/grimoire/errors"
)

// UniqueConstraintMessage is the default error message for UniqueConstraint.
var UniqueConstraintMessage = "{field} has already been taken"

// UniqueConstraint adds an unique constraint to changeset.
func UniqueConstraint(ch *Changeset, field string, opts ...Option) {
    options := Options{
        message: UniqueConstraintMessage,
        name:    field,
        exact:   false,
    }
    options.apply(opts)

    ch.constraints = append(ch.constraints, Constraint{
        Field:   field,
        Message: strings.Replace(options.message, "{field}", field, 1),
        Code:    options.code,
        Name:    options.name,
        Exact:   options.exact,
        Kind:    errors.UniqueConstraint,
    })
}