forked from ebhomengo/niki
52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
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// Copyright 2018 Qiang Xue, Google LLC. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package validation
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// ErrNotInInvalid is the error that returns when a value is in a list.
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var ErrNotInInvalid = NewError("validation_not_in_invalid", "must not be in list")
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// NotIn returns a validation rule that checks if a value is absent from the given list of values.
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// Note that the value being checked and the possible range of values must be of the same type.
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// An empty value is considered valid. Use the Required rule to make sure a value is not empty.
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func NotIn(values ...interface{}) NotInRule {
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return NotInRule{
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elements: values,
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err: ErrNotInInvalid,
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}
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}
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// NotInRule is a validation rule that checks if a value is absent from the given list of values.
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type NotInRule struct {
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elements []interface{}
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err Error
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}
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// Validate checks if the given value is valid or not.
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func (r NotInRule) Validate(value interface{}) error {
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value, isNil := Indirect(value)
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if isNil || IsEmpty(value) {
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return nil
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}
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for _, e := range r.elements {
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if e == value {
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return r.err
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}
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}
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return nil
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}
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// Error sets the error message for the rule.
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func (r NotInRule) Error(message string) NotInRule {
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r.err = r.err.SetMessage(message)
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return r
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}
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// ErrorObject sets the error struct for the rule.
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func (r NotInRule) ErrorObject(err Error) NotInRule {
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r.err = err
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return r
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}
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