convert Odoo attachments to filestore

gistfile1.txt

# see https://www.odoo.com/forum/help-1/question/where-are-document-attachments-stored-529

session.open()
attachment_obj=session.env['ir.attachment']

def migrate_attachment(att):
	# 1. get data         
	data = att.read(['datas'])['datas']
    
	# 2. Re-Write attachment
	#a = attachment_obj.write([att_id], {'datas': data})
	pass


attachments = attachment_obj.search([('db_datas','=',True)]) #attachment_obj.search([('store_fname','=',False)])
cnt = len(att_ids) 
i = 0
for att in attachments:
	#att = attachment_obj.read(id, ['datas','parent_id'])
	migrate_attachment(att)
	print 'Migrated ID %d (attachment %d of %d)' % (att.id, i, cnt)
	i = i + 1

session.commit()