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In version 5 of openerp, you could import directly into an embedded tree view in a form page (eg import sales lines on a sales order). Is there any way to do this in version 6 or 7? It was useful functionality. 
There is of course a workaround by importing sub-objects (eg import sales order with "line_ids/name" etc) but it is not very user friendly.
Timothy,
There is a Module Sale_line_import from Vauxoo, should help. This is for SO only, but you may add up for your desired model.
Thanks.
Will check it out!
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Timothy, there is no generic way because the internal O2M might need the mandatory parent field. So line_ids/name seems the way for now.
Thanks. See answer here too: http://stackoverflow.com/questions/24572424/is-there-a-way-to-import-into-an-openerp-tree-view-like-in-v5