#25021: HStore values query with contains does not actually work
-------------------------------------+-------------------------------------
Reporter: amagidow | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 1.8
(models, ORM) | Keywords: HStore, Postgresql,
Severity: Normal | queries
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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When using an HStore {{{__values}}} query with {{{__contains}}} chained on
to it, the query does not work as expected in Django 1.8.2. Expected
action is that any values which contain the text will be returned from the
query.
From my own app (I've removed some of the queryset results to make this
easier to read)
{{{
>>> query1
[<LanguageDatum: \xf0i, This (m), And, >, <LanguageDatum: hadi, This (f),
AfgA, >, <LanguageDatum: -e, His, ArBah, >, '...(remaining elements
truncated)...']
>>> query1.filter(multigloss__values__contains=["This"])
[]
>>> query1.filter(multigloss__values__contains=["This (f)"])
[<LanguageDatum: hadi, This (f), AfgA, >, <LanguageDatum: \xf0i, This
(f), ArAnz, >, '...(remaining elements truncated)...']
>>> query1.filter(multigloss__values__contains=["His"])
[<LanguageDatum: -e, His, ArBah, >, <LanguageDatum: -eh, His, ArBah, >,
<LanguageDatum: -hu, His, Chd, >, <LanguageDatum: -u, His, Chd, >
'...(remaining elements truncated)...']
>>> query1.filter(multigloss__values__contains=["Hi"])
[]
}}}
The expected result would be that the queries would return any data whose
'multigloss' values contain the string, not only those strings which are
exactly identical.
The example in the documentation should also fail if you did not include
the entire word "collie" (I have not tested, this is a hypothesized
result):
{{{
>>> Dog.objects.create(name='Rufus', data={'breed': 'labrador'})
>>> Dog.objects.create(name='Meg', data={'breed': 'collie', 'owner':
'Bob'})
>>> Dog.objects.filter(data__values__contains=['collie'])
[<Dog: Meg>]
>>>#Hypothesized example!
>>> Dog.objects.filter(data__values__contains=['coll'])
[]
>>>#Should have returned [Dog: Meg]
}}}
If this is not how {{{__values__contains}}} is supposed to work, this
should be clarified in the documentation since it is extremely unclear how
to do a search for values within the HStore that match a certain criterion
(such as containing a string).
--
Ticket URL: <https://code.djangoproject.com/ticket/25021>
Django <https://code.djangoproject.com/>
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