django-queryset Archives

Programming, sql

IT Nursery

How to select a record and update it, with a single queryset in Django?

How do I run an update and select statements on the same queryset rather than having to do two queries: – one to ...

June 3, 2022
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Programming, Python

IT Nursery

How can I filter a date of a DateTimeField in Django?

I am trying to filter a DateTimeField comparing with a date. I mean: MyObject.objects.filter(datetime_attr=datetime.date(2009,8,22)) I get an empty queryset list as an answer ...

May 30, 2022
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How to do a less than or equal to filter in Django queryset?

I am attempting to filter users by a custom field in each users profile called profile. This field is called level and is ...

May 25, 2022
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Django values_list vs values

In Django, what’s the difference between the following two: Article.objects.values_list('comment_id', flat=True).distinct() vs Article.objects.values('comment_id').distinct() My goal is to get a list of unique comment ...

May 24, 2022
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Checking for empty queryset in Django

What is the recommended idiom for checking whether a query returned any results? Example: orgs = Organisation.objects.filter(name__iexact="Fjuk inc") # If any results # ...

May 22, 2022
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How do I filter query objects by date range in Django?

I’ve got a field in one model like: class Sample(models.Model): date = fields.DateField(auto_now=False) Now, I need to filter the objects by a date ...

May 14, 2022
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How do I get the object if it exists, or None if it does not exist in Django?

When I ask the model manager to get an object, it raises DoesNotExist when there is no matching object. go = Content.objects.get(name="baby") Instead ...

May 13, 2022
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Getting the SQL from a Django QuerySet [duplicate]

This question already has answers here: How can I see the raw SQL queries Django is running? (21 answers) Closed 7 years ago. ...

May 10, 2022
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How to perform OR condition in django queryset?

I want to write a Django query equivalent to this SQL query: SELECT * from user where income >= 5000 or income is ...

May 9, 2022
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How can I filter a Django query with a list of values?

I’m sure this is a trivial operation, but I can’t figure out how it’s done. There’s got to be something smarter than this: ...

May 8, 2022
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