> For the complete documentation index, see [llms.txt](https://docs.oneweb.tech/oneweb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.oneweb.tech/oneweb/sample-apps/order-management-app-web/app-designer-customize/validate-order-unit-and-calculate-total-price.md).

# Validate Order Unit and calculate Total Price

Learn about step to validate Order Unit and auto calculate Total Price after changing Order Unit. \
**Requirement** \
&#x20;     1\. Order Unit must <= In Stock and Order Unit must <= Remain Order Unit. \
&#x20;     2\. Auto calculate Total Price after changed Order Unit.

**Procedure** \
1\. From ONEWEB workspace, create javascript file name "<mark style="background-color:blue;">/MasterWeb/WebContent/manual/js/doc/order/order\_request\_item\_back\_office\_update\_mode.js</mark>" in MasterWeb and override method "modifyInsertMany(String moduleID, HashMap hStoreHashMap, String processMode, int row)" with coding below.

```
// Auto script when open popup
function loadUpdateManyManual(){
	calPriceByInputUnit();
}

// Auto calculate field on popup
function calPriceByInputUnit(){
	$("[name=UNIT_BY_BACK_OFFICE]").change(function(){
		var stock = parseInt($("[name=IN_STOCK]").val());
		var remain = parseInt($("[name=REMAIN_ORDER_UNIT]").val());
		var getUnitBackofc = parseInt($("[name=UNIT_BY_BACK_OFFICE]").val());
		
		if(getUnitBackofc > stock || getUnitBackofc > remain){
			alert('Unit choose by backoffice must less than stock and remain');
			$("[name=UNIT_BY_BACK_OFFICE]").val('');
			$("[name=UNIT_BY_BACK_OFFICE]").focus();
		}else{
			var pricePerUnit = $("[name=UNIT_PRICE]").val();
			var totalPrice = getUnitBackofc*pricePerUnit;
			console.log('totalPrice: '+totalPrice) ;
			$('[name=TOTAL_PRICE]').val(moneyFormat(totalPrice));
		}
	});
}

// Change to money format
function moneyFormat(strMoneyA) {
	var strMoney = new String(strMoneyA);
	if(strMoney != undefined && strMoney != 'null' && strMoney != ''){
		strMoney  = strMoney.replace(/\,/g,'');
		strMoney = parseFloat(strMoney).toFixed(2);
		strMoney += '';
		x = strMoney.split('.');
		x1 = x[0];
		x2 = x.length > 1 ? '.' + x[1] : '';
		var rgx = /(\d+)(\d{3})/;
		while (rgx.test(x1)) {
			x1 = x1.replace(rgx, '$1' + ',' + '$2');
		}
		return x1 + x2;
	}else{
		return '0.00';
	}	
}
```

2\. From ONEWEB workspace, export EafMasterEar.ear and deploy update to server. The javascript file name "<mark style="background-color:blue;">/MasterWeb/WebContent/manual/js/doc/order/order\_request\_item\_back\_office\_update\_mode.js</mark>" will update to server.

3\. Go to App Designer and open entity name "**Doc Order Request Item - Back Office**" to edit.

4\. From **Tools > Action** drag **Entity Action** to the box under entity name. The action name "SEARCH" shows then click icon pencil to edit it. The dialog of Action Field Configuration opens. \
&#x20;     Change Process Name to "UPDATE". \
&#x20;     Put "<mark style="background-color:blue;">/MasterWeb/manual/js/doc/order/order\_request\_item\_back\_office\_update\_mode.js</mark>" to Script File. \
&#x20;     Click **OK**.

5\. Click **Save this Entity**.

6\. Test by log in to FrontWeb. \
&#x20;     Login with Back Office user. \
&#x20;     Go to To Do List and claim job. \
&#x20;     Click edit Order Item. \
&#x20;     Click edit Supplier. \
&#x20;     The system must calculate remain order unit.


---

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