django-queryset

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Django queryset with "isnull" argument returning duplicates

I want to only return items that don\'t have associated images.My relationship is something like this:[详细]

2023-03-04 05:29 分类：问答
Django: Total birthdays each day for the next 30 days

I\'ve got a model similar to this: class Per开发者_JS百科son(models.Model): name = models.CharField(max_length=40)[详细]

2023-03-04 03:48 分类：问答
django model cannot access parent child record

I have a very strange problem, I have a queryset that join with itself, when I try to access the p开发者_StackOverflow社区arent record information using a[n] it works, when I loop through it doesn\'t.[详细]

2023-03-03 19:12 分类：问答
Get total for each month using Django

I have a model like this: class Sales(models.Model): item = models.CharField(max_length=40) date_sold = models.DateTimeField()[详细]

2023-03-03 13:34 分类：问答
In Django, Can I `defer()` fields in an object that's being queried by `select_related()`

In my Django app I want to use select_related() on a QuerySet to \"follow\" a ForeignKey field, but I only need to access a few of the fields on the \"followed\" model instance. Can I use the defer()[详细]

2023-03-03 06:44 分类：问答
Effeciently Lookup Multiple Model Foreign Key Sets in Django

I have two models: from django.db import Models LANGUAGES = ( (\'en\',\'English\'), (\'es\',\'Spanish\'),[详细]

2023-03-03 00:10 分类：问答
Specifying Django Query Filters at Run Time

How do I specify an arbitrary Django query filter at runtime? Normally one uses filters like so... query_set = MyModel.objects.filter(name__iexact=\'foobar\')[详细]

2023-03-02 23:10 分类：问答
Django QuerySet order_by string evaluation

I\'m trying to sort my QuerySet based on how the objects in the QuerySet are evaluated as Strings. So my model looks something like this:[详细]

2023-03-01 12:20 分类：问答
Using Django custom manager function on an already filtered queryset

Consider the following case: class MyModelManager(models.Manager): def my_filter(self): return [some code here].filter(field_A__gt=3)[详细]

2023-03-01 11:19 分类：问答
Yet another QuerySet custom ordering problem

Lots of searchi开发者_运维知识库ng, found nothing so far. In my django app, Model_X is rated by my users using a very standard ratings model.I have a standalone function that processes a LOT of data[详细]

2023-03-01 05:55 分类：问答