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// Copyright 2016 Qiang Xue. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package validation
// ErrNotNilRequired is the error that returns when a value is Nil.
var ErrNotNilRequired = NewError("validation_not_nil_required", "is required")
// NotNil is a validation rule that checks if a value is not nil.
// NotNil only handles types including interface, pointer, slice, and map.
// All other types are considered valid.
var NotNil = notNilRule{}
type notNilRule struct {
err Error
}
// Validate checks if the given value is valid or not.
func (r notNilRule) Validate(value interface{}) error {
_, isNil := Indirect(value)
if isNil {
if r.err != nil {
return r.err
}
return ErrNotNilRequired
}
return nil
}
// Error sets the error message for the rule.
func (r notNilRule) Error(message string) notNilRule {
if r.err == nil {
r.err = ErrNotNilRequired
}
r.err = r.err.SetMessage(message)
return r
}
// ErrorObject sets the error struct for the rule.
func (r notNilRule) ErrorObject(err Error) notNilRule {
r.err = err
return r
}
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