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Editorial Team
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Asked: 2026-05-28T00:03:07+00:00

I try to filter and get some set of objects using this segment. baseSet

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I try to filter and get some set of objects using this segment.

baseSet = ThreadedComment.objects.filter(tree_path__contains = baseT.comment_ptr_id)

but it brings some objects that are not supposed to be there.
For example, my baseT.comment_ptr_id is 1, it brought items with these tree_path.

comment_ptr_id=1 treepath = 0000000001
comment_ptr_id=3 treepath = 0000000001/0000000003
comment_ptr_id=4 treepath = 0000000001/0000000003/0000000004
comment_ptr_id=8 treepath = 0000000001/0000000003/0000000004/0000000008
comment_ptr_id=10 treepath = 0000000006/0000000010
comment_ptr_id=11 treepath = 0000000011

The last 2 ones are not supposed to be here. But since their tree_path contains “1”
filter brings those as well.

How can I write regex to create a filter that does not bring those items?

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1 Answer

  1. Editorial Team

    Why not do

    baseSet = ThreadedComment.objects.filter(tree_path__contains = ('%010i' % int(baseT.comment_ptr_id)))

    so that the search string for id=1 will be “0000000001” and won’t be a substring of “0000000011”?

    EDIT: As per the comment below, it might be better to use COMMENT_PATH_DIGITS. This is a little messier because you’re using formatting to set a formatting tag. It looks like this:

    tree_path__contains = ('%%0%ii' % COMMENT_PATH_DIGITS % int(baseT.comment_ptr_id))
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