Minimum product quantity required when creating Quote/order/invoice

Some time in order needs to products with certain Quantity, if product added below certain Quantity, then need to stop user from creating quote.

I am doing this functionality using JavaScript.

In this example I am using crmFetchkit.js.  this kit is available on  http://crmtoolkit.codeplex.com

Here are steps

1. Create JavaScript web resource and add following code in JavaScript.. I created Js web resource with name Quote.js
In this script I am using FetchXML to retrieve products from Quote. To generate FetchXML, easiest option is using Advanced find.

	function CheckPrductQuantity(productName) {
	var fetchXml = ['<fetch distinct="false" mapping="logical" output-format="xml-platform" version="1.0">',
	'<entity name="quotedetail">',
	'<attribute name="productid"/>',
	'<attribute name="productdescription"/>',
	'<attribute name="priceperunit"/>',
	'<attribute name="quantity"/>',
	'<attribute name="extendedamount"/>',
	'<attribute name="quotedetailid"/>',
	'<order descending="false" attribute="productid"/>',
	'<link-entity name="quote" alias="ab" to="quoteid" from="quoteid">',
	'<filter type="and">',
	'<condition attribute="quoteid" value="'+ Xrm.Page.data.entity.getId() +'" uitype="quote" operator="eq"/>',
	'</filter>',
	'</link-entity>',
	'</entity>',
	'</fetch>'].join('');
	CrmFetchKit.FetchAll(fetchXml).then(function (quoteProducts) {
	for (var index in quoteProducts) {
	var quoteProd = quoteProducts[index];
	var quantity = quoteProd.attributes.quantity.value;
	var product = quoteProd.attributes.productid.name;
	if (productName == product) {
	if (quantity < 5) {
	Xrm.Page.ui.setFormNotification("Quantity should be greater than 5", "ERROR", "productQuantityError");
	}
	else {
	Xrm.Page.ui.clearFormNotification("productQuantityError");
	}
	}
	}
	}, onFetchError);
	}
	function onFetchError(xhr, status, errorThrown) {
	var errormsg = $(xhr.responseXML).find('Message').text();
	alert('CrmFetchKit-Error occured: ' + errormsg);
	}

view raw gistfile1.txt hosted with ❤ by GitHub

2. Add latest jquery library in form library

3. Add CrmFetchkit.js web resource in Form library

4. Add Quote.Js in form library

5. Call CheckPrductQuantity with product name as parameter function onLoad and OnSave event of Form.

6. Save and publish your form. 

7. Now if product added with quantity less than 5, it will show message as below.