id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
31749	Unable to find effective method to bulk_update else create	Vishesh Mangla	nobody	"I 'm making this code where on daily basis after preprocessing a csv file 100, 000 -200, 000 or even more rows will be read. Each row will get converted to a model object. Now the csv says me nothing about whether those ids existed in the database or not. I have been said 
""update if key already present else create a new one"". And the client has  demands that it should be done in seconds. I said that it's not possible and somehow he is ready to wait for 15 minutes at the max. That's why I 'm refraining from using create_or_update or other functions. Is there any way to achieve the speed and accomplish the task at the same time? There are around 100 columns and the file is being read in small chunks because I can't read it whole in the memory. It's whopping 140 mbs."	New feature	closed	Database layer (models, ORM)	3.0	Normal	invalid	bulk_update, bulk_create		Unreviewed	0	0	0	0	0	0