Skip the row that violates 'unique' constraint

[chfw]

if a column of table had 'unique' and a few row of your import data got 'None' for it, django will complain the value of this column may not be NULL. This complaint stops bulk import. Nothing got imported.The solution is to try import one by one. Yes, it will be slow if you have large data.

So, unless you make sure no violation before import, you will not hit this issue and will enjoy the speed of bulk_create.