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fix DISTINCT for Oracle databases #2935

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fix DISTINCT for Oracle databases #2935

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7813d2f
fix DISTINCT for Oracle databases
trollknurr May 14, 2015
c47ec60
no need to do distinct on every loop cycle & add analogue of distinct…
trollknurr May 14, 2015
de95598
removed using `view.model.objects`
trollknurr May 15, 2015
0906bf2
fix empty and_query
trollknurr May 15, 2015
745d8d0
added comment
Jun 3, 2015
e8b23c4
thin logic
Jun 25, 2015
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no need to do distinct on every loop cycle & add analogue of distinct… 
… for oracle users
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@trollknurr
trollknurr committed May 14, 2015
commit c47ec60ea21907a29746e310ec1bc9ab124f9d5a
7 changes: 5 additions & 2 deletions rest_framework/filters.py
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Expand Up @@ -106,9 +106,12 @@ def filter_queryset(self, request, queryset, view):
or_queries = [models.Q(**{orm_lookup: search_term})
for orm_lookup in orm_lookups]
queryset = queryset.filter(reduce(operator.or_, or_queries))
if settings.DATABASES[queryset.db]["ENGINE"] != "django.db.backends.oracle":
queryset = queryset.distinct()

if settings.DATABASES[queryset.db]["ENGINE"] != "django.db.backends.oracle":
queryset = queryset.distinct()
else:
pk_list = queryset.values_list('pk', flat=True)
queryset = view.model.objects.filter(pk__in=set(pk_list))
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@lovelydinosaur lovelydinosaur May 15, 2015

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Using view.model.objects here feels a little bit brittle. I think we can avoid needing that. Does something like the following make sense?...

if settings.DATABASES[queryset.db]["ENGINE"] != "django.db.backends.oracle":
    return queryset.filter(reduce(operator.or_, or_queries)).distinct()
else:
    pk_list = queryset.filter(reduce(operator.or_, or_queries)).values_list('pk', flat=True)
    return queryset.filter(pk_in=set(pk_list))

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@kevin-brown kevin-brown May 15, 2015

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Side note here: Since when is the model attribute back on views? I thought that was removed.

return queryset


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