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yup-extensions.js
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yup-extensions.js
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import * as Yup from 'yup'
const StringSchema = Yup.string
/**
* `NullableStringSchemaType` is an extension for the default `yup.string` schema type.
* It transforms the value to `null` if it is empty and skips validation.
*/
class NullableStringSchemaType extends StringSchema {
constructor() {
super()
const self = this
self.withMutation(function() {
self
.transform(function(value) {
if (self.isType(value) && Boolean(value)) {
return value
}
return null
})
.nullable(true)
})
}
}
Yup.nullableString = () => new NullableStringSchemaType()
Yup.addMethod(Yup.string, 'emptyOrLength', function(exactLength, message) {
// eslint-disable-next-line no-invalid-this
return this.test(
'empty-or-length',
message,
value => !Boolean(value) || value.length === exactLength,
)
})
export default Yup