The method "_prepare_order_line_invoice_line" is used to inherit to fetch a custom field value in sale.order.line to corresponding invoice when creating invoice "On Demand".

The method "_prepare_invoice_line" is used to inherit to fetch a custom field value in sale.order.line to corresponding invoice when creating invoice "On Delivery", in OpenERP 7.

Which method should we inherit for the same in Odoo8?

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