Purchase Order item- Child table- not able to update

Hello,

i would like to fetch the “drawing revision” into the “purchase order item-Child Table” in the purchase order, but could not update as shown in below message.

is there a way to update child table of purchase order item? pls guide

@prasad_naik purchase order item is standard doctype so you can’t do some customization using edit doctype.you have to do some customization using customization form.you can use fetch from for that.
You can refer this How does the "Fetch From" in Doctype Custom Field work?

No it doesn’t work @Jeel . there is no way to navigate through “Purchase Order Item” (Child doc type) and add new field

@prasad_naik drawing revision is your custom field right.so you can add item_code.drawing_revision in fetch from in your field

Its not allowing me to add custom field @Jeel . tried it.

please check above screenshot for ref