I\'ve heard suggestions to use the following: if qs.exists(): ... if qs.count(): ...开发者_如何学编程
I am using django, and all of my queries are created by django, so i have no handwritten queries... I have a table of BillRecords, which has a field subscriberno . In my django filters, i use a filte
Let\'s say I have a ForeignKey from Coconut to Swallow (ie, a swallow has carried many coconuts, but each coconut has been carried by only one swallow).Now let\'s say that I have a ForeignKey from hus
I have a page where users can see the comments list for a specific product. In the view I get the list with:
I\'m trying to find the cumulated duration of some events, \'start\' and \'end\' field are both django.db.models.DateTimeField fields.
I\'ve tried these queries with these results: queryset.update(done=not F(\'boolean\')) {\'time\': \'0.001\', \'sql\': u\'UPDATE \"todo_item\" SET \"done\" = True\'}
I have the following situ开发者_开发知识库ation: A person can belong to multiple organizations and an organization can have multiple members (Persons)
class UserProfile(models.Model): user = models.ForeignKey(User, unique = True, related_name = \'user\')
What I am trying to do is to write a query set that filters out unique parent/name combinations.I\'m only interested in the first occurance of a unique parent name.
I have a simple blog app with the model \"Post\". If I delete all the entries in the Post model I get an error when I try reference the first item in the post list ordered by date, which I did like th
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