Adding an extra Field in JSP

The problem is like this.
I have created BC4J and JSPs which uses this BC4J. Now in the JSP i want to display a Non-Database Field (which is not in the table or field whose value has to be taken from another table). For eg: I have a ItemMaster table(Master) and AlternatItem Table(Detail). The ItemMaster Table consist of ItemCode,ItemName. AlternateItem has foreign key -ItemCode. Now in AlternateItem table i have altItemcode field which is to be displayed in the JSP(Master-detail).Along with this i want to display Item Name. This item name will come from the master table(item Master). So i have to have a non-database field called item name which will take the respective item name from the
Master table.
Now for this what can i do? Is it possible to create a new dummy field in BC4J component or view and somehow relate that to a query which will pick up the name from ItemMaster for the altitemcode typed(like in forms we may write :select ItemName from ItemMaster where itemCode = :altitemcode something like that).
null

Arun,
Is your JSP a master-detail form (i.e. a master-record on top with multiple detail records in a grid below), or does your JSP just contain the detail records and you want to use itemname instead of itemcode?
Depending on the answer, you could do this in a couple of different ways:
1. In the detail JSP, use an LOV for the itemcode field that shows the itemname, but returns the itemcode value. In the JSP Insert and Edit pages, use the following code before the render() method for the EditCurrentRecord bean:
RowEditor.useComboBox("Itemname","select itemcode,itemname from itemmaster","ITEMNAME","ITEMCODE");
2. Another way, if you just have a JSP for the detail, is to have a View Object that includes both the master and detail entities with a join in their where clause. Note that when you do this, one of the tables will be listed as a 'reference only' table. Make sure you set the ItemMaster table as the reference one since you just want to use that for the name column.
Option #1 is probably a better one if you want to allow updates/inserts since it allows users to choose from a set list of Item Names in a drop-down list format.
Laura
null

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