django-queryset

问题 On my site user should have an ability to filter numbers, like *123*321* , that will match "666 123 555 321 111" or LIKE '%123%321%' . By default django's orm escapes %-sign. I can use regex, or raw query, but is there some workaround? UPD: i'll place it here for displaying another way. integer_search = [] # for colorizing found substrings if actual['integer']: integer_match = filter(None, actual['international'].split('*')) integer_search = integer_match integer_match = ''.join('%s[[:digit:]

问题 I have model for question: class Question(models.Model): user = models.ForeignKey(User) title = models.CharField(max_length=120) description = models.TextField() answers = models.ManyToManyField('Answer',related_name='answer_name', blank=True) post_date = models.DateTimeField(auto_now=True) def __unicode__(self): return self.title And I have model for answer: class Answer(models.Model): user = models.ForeignKey(User) question = models.ForeignKey(Question) ans_body = models.TextField() post

问题 I am having the following issue (BTW I think I had not had this problem the day before): >>> rule = Rule.objects.get(user=user) >>> rule.id 1 >>> rule = Rule.objects.get(user=user).latest('id') AttributeError: 'Rule' object has no attribute 'latest' Why am I getting the error? 回答1: The get() function of the Model Manager returns an instance of the Model itself. The latest() function you mention belongs to the QuerySet class. Calling .filter(), .all(), .exclude() etc, all return a QuerySet.

问题 Doing my first real Django project, and need guidance. Background: My project is a reddit clone. Users submit links+text. Visitors upvote or downvote. There's a social_ranking algo, runs every ~2 mins as a background script, reranks all the submissions according to net votes and freshness of content. Fairly vanilla stuff. Problem: Ordering by votes isn't working correctly, because votes are being initialized as None instead of 0 . This causes submissions with None votes to rank below

问题 class Company(models.Model): name = models.CharField(max_length=60) class Employee(models.Model): dept = models.ForeignKey(Company) Django ORM: Here I want to access name through Employee class in Django ORM. I wrote something like this: `Employee.objects.filter(name = dept__Company)`(Used two double underscore for other model class) Will above is correct? Can someone have any idea? 回答1: From what I understand, you're just trying to retrieve the employees that belong to a certain company. To

问题 Can I filter a queryset based on a model field's choices? model: COLORS = ( ('BLACK', 'black'), ('RED', 'red'), ('BLUE', 'blue'), //etc.. ) class Thing(Models.model): color = models.CharField(max_length=5, choices=COLORS) view: def filter_by_color(request): q = Thing.objects.filter(???) Is there a way to filter Thing based on different color choices? Also, is there a way to write this dynamically, so that all color choices can respond to a single view? 回答1: Do you want this? view def filter

问题 I want a user to be able to perform the following query: Fetch all the people, without Phd, with full time contract with a contract within two dates. that translates in Django: Contract.objects.filter( person__is_doctor = False, type_contract = 'full', starting_date__gte = start_date, ending_date__lte = end_date ) How can I make a form/view/template to allow the user enter both start_date and end_date and show the results? models class Person(models.Model): name = models.CharField(max_length

问题 I have two models, Position and Player, for a baseball site. Positions are named pitcher, catcher, first base, second base, third base, etc. class Position(models.Model): name = models.CharField(max_length=100) slug = models.SlugField() class Player(models.Model): name = models.CharField(max_length=300) slug = models.SlugField() position = models.ForeignKey(Position) Is there a way to make one query to return players in a specific order? For example, I'd like to do something like: Player

问题 Foo.objects.all().distinct('foo') won't remove duplicates Foo.objects.all().order_by().distinct('foo') does remove them. I have Meta.ordering = ('-field1', '-field2) Does Foo.objects.all().order_by().distinct('foo') respects the Meta.ordering? i.e. I want distinct values ordered by Meta.ordering and not sure how to do it. Django Documentation is confusing and don't address how order_by() without any argument works. I'm using postgresql 9.3 btw. In [28]: BestMomsdiaryThread.objects.all()

问题 is there any way of doing the following Unicorn.objects.or_filter(magical=True).or_filter(unicorn_length=15).or_filter(skin_color='White').or_filter(skin_color='Blue') where or_filter stands for an isolated match I remember using something similar but cannot find the function anymore! Help would be great! Thanks :) 回答1: You're looking for Q objects. 来源： https://stackoverflow.com/questions/2964540/is-there-an-or-filter-django