YUP Validation for String and Array

 YUP Validation for string and Array 

purposeTypes: Yup.lazy(() => {
			if (this.state.isMLPurposeTypes) {
				return Yup.string().notRequired();
			}
			return Yup.array().min(1, 'Select Asset Type');
		}),

decisionFlowValidationSchema = Yup.object().shape({
		flowDescription: Yup.string().required('Flow Description can not be blank'),
		appType: Yup.string().required('Select App Type'),
		isSinglePaymentLoan: Yup.string().required('Select Single Payment Loan'),
		calculateBasedOn: Yup.lazy(() => {
			if (this.state.isCalculateBasedOnHidden) {
				return Yup.string().notRequired();
			}
			return Yup.string().required('Select Calculate Based On');
		}),
		assetTypes: Yup.lazy(() => {
			if (this.state.isHEVLAssetType) {
				return Yup.array().min(1, 'Select Asset Type');
			}
			return Yup.array().notRequired();
		}),
		purposeTypes: Yup.lazy(() => {
			if (this.state.isMLPurposeTypes) {
				return Yup.array().notRequired();
			}
			return Yup.array().min(1, 'Select Asset Type');
		}),
	});