yup

How to use yup’s object.shape with typescript?

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following the yup guide here you should change your code as follows: import { object, SchemaOf, string } from ‘yup’; interface BaseBootstrapSchema { APPLICATION_NAME: string; LOG_PATH: string; } const bootstrapValidationSchema: SchemaOf<BaseBootstrapSchema> = object({ LOG_PATH: string().required(“The ‘LOG_PATH’ ENV variable is required”), APPLICATION_NAME: string().required(“The ‘APPLICATION_NAME’ ENV variable is required”), }); module.exports = (schema: SchemaOf<BaseBootstrapSchema>) => new Promise((resolve, … Read more

Conditional validation with Yup and Formik

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Updated ans: 2023. you can use Yup conditions const validationSchema = Yup.object().shape({ isCompany: Yup.boolean(), companyName: Yup.string().when(‘isCompany’, { is: true, then: Yup.string().required(‘Field is required’) }), companyAddress: Yup.string().when(‘isCompany’, { is: (isCompany) => true,//just an e.g. you can return a function then: Yup.string().required(‘Field is required’), otherwise: Yup.string() }), // test an unconventional type logo: Yup.mixed() .test(‘file_size’, ‘error: file … Read more

Get the value of another field for validation in Yup Schema

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number.max cannot reference other field and calculate with it at validation. If you want to do this, you need to implement own schema with mixed.test. Here is a example. tips: number() .min(0, `Minimum tip is $0`) .test({ name: ‘max’, exclusive: false, params: { }, message: ‘${path} must be less than 10% of the price’, test: … Read more

yup validation on multiple values

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When using Yup if all normal features fail you, you can use the .test feature, documented here – https://github.com/jquense/yup#mixedtestname-string-message-string–function-test-function-schema mixed.test(name: string, message: string | function, test: function): Schema Adds a test function to the validation chain. Tests are run after any object is cast. Many types have some tests built in, but you can create … Read more

Yup validation with two fields related

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An example of a field that requires a numeric value that cannot be higher than the multiplication of two other field’s values const validationSchema = Yup.object().shape({ num1: Yup.number().positive().required(‘This field is required.’), num2: Yup.number().positive().required(‘This field is required.’), num3: Yup.number().positive().required(‘This field is required.’) .when([‘num1’, ‘num2’], (num1, num2, schema) => { return num1 > 0 && num2 > … Read more

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