brotherton-erpnext/docs/dev/custom_script_examples/docs.dev.custom_script.item_code.md

---
{
	"_label": "Generate Item Code based on Custom Logic"
}
---
Add this in the Custom Script of **Item**, so that the new Item Code is generated just before the a new Item is saved.

	cur_frm.cscript.custom_validate = function(doc) {
	    // clear item_code (name is from item_code)
	    doc.item_code = "";

	    // first 2 characters based on item_group
	    switch(doc.item_group) {
	        case "Test A":
	            doc.item_code = "TA";
	            break;
	        case "Test B":
	            doc.item_code = "TB";
	            break;
	        default:
	            doc.item_code = "XX";
	    }

	    // add next 2 characters based on brand
	    switch(doc.brand) {
	        case "Brand A":
	            doc.item_code += "BA";
	            break;
	        case "Brand B":
	            doc.item_code += "BB";
	            break;
	        default:
	            doc.item_code += "BX";
	    }
	}