Intentionally introduce discrepancies in the errors during validation of an object using hapi/joi

const validationSchema = Joi.object().keys({
              Id: Joi.number().required(),
              CustomerName: Joi.string()
                .trim()
                .required()
                .when('$isInValidCustomer', {
                  is: true,
                  then: //Inject additional error in the existing error block for CustomerName,
                }),
               BankName: Joi.string().trim().required(),
            });

const customerDetails = {
Id: 2,
CustomerName: 'xyz'
BankName: ''
};

const schemaOptions = {
              abortEarly: false,
              context: {
                isInValidCustomer: true,
              },
            };

const validationErrors = validationSchema.validate(customerDetails, schemaOptions);

When validating the 'customerDetails' object, I need to ensure the following 2 errors occur: - An error for CustomerName due to 'isInValidCustomer' being true - An error for BankName as it is required

I'm struggling to add an error for CustomerName within the current error object. Using '.error()' only provides a single error related to either 'CustomerName' or 'BankName.'

Any assistance on this matter would be greatly appreciated.

javascriptnode.jsvalidationhapi.jsjoi

Answer №1

One way to accomplish this is by utilizing a specialized function.

const schema = Joi.object().keys({
              Id: Joi.number().required(),
              CustomerName: Joi.string()
                .trim()
                .required()
                .when('$isInValidCustomer', {
                  is: true,
                  then: Joi.any().custom(() => {
                    throw new Error('Invalid Customer');
                    }),
                }),
               BankName: Joi.string().trim(),
            });

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