django-orm

I have a table that I cannot control, but need to select from it. The field "building" is a varchar, and also defined like this in my (non managed) django model. But it should be treated as integer, when selecting from that table (there are values like "000100", and even spaces at the end). I need a simple filter like this: .annotate(CastInt("building")).filter(building__castint__exact=my_id) only problem is, CastInt does not exist. How could one achieve this? I was looking at .extra() (that we should no use anymore, as it's deprecated) and RawSQL, but hoping for a solution using only the

I am doing tag search function, user could observe a lot of tags, I get it all in one tuple, and now I would like to find all text which include at least one tag from the list. Symbolic: text__contains__in=('asd','dsa') My only idea is do loop e.g.: q = text.objects.all() for t in tag_tuple: q.filter(data__contains=t) For example: input tuple of tags, ('car', 'cat', 'cinema') output all messages what contains at least one word from that tuple, so My cat is in the car , cat is not allowed in the cinema , i will drive my car to the cinema Thanks for help! Here you go: filter = Q() for t in tag

My models.py has User and Business models that have this field: location = PointField(geography=True) I'm getting Google Maps coordinates (in EPSG 4326 ) via Geocode service from an address which the user specifies. Then I'm saving it in the above field (also EPSG 4326 ). Now, what I want is to get all Business objects within a specified radius (of 1km for example), based on the user location: Business.gis.filter(location__distance_lt=(request.user.location, D(km=1))) But it doesn't work, it gives me this error: ValueError: SpatiaLite does not support distance queries on geometry fields with a

It seems like Django by default adds ORDER BY to queries. Can I clear it? from slowstagram.models import InstagramMedia print InstagramMedia.objects.filter().query SELECT `slowstagram_instagrammedia`.`id`, `slowstagram_instagrammedia`.`user_id`, `slowstagram_instagrammedia`.`image_url`, `slowstagram_instagrammedia`.`video_url`, `slowstagram_instagrammedia`.`created_time`, `slowstagram_instagrammedia`.`caption`, `slowstagram_instagrammedia`.`filter`, `slowstagram_instagrammedia`.`link`, `slowstagram_instagrammedia`.`attribution_id`, `slowstagram_instagrammedia`.`likes_count`, `slowstagram

I am building a Django project from an existing database. The database is being used by other systems, so I cannot change its schema. This is my current custom User model: class Users(AbstractBaseUser): id_user = models.IntegerField(primary_key=True) role = models.IntegerField() username = models.CharField(max_length=50, unique=True) last_login_date = models.DateTimeField() AbstractBaseUser needs a column named last_login , while current database table has last_login_date column which serves like AbstractBaseUser.last_login . Now I need to use that column in Users.last_login : ... last_login =

I'm building a webapp with django with the following models: class Business(models.Model): ... class Branch(models.Model): business = models.ForeignKey(Business) ... class Event(models.Model): branch = models.ForeignKey(Branch) My questions is how can I get all events by their business (not their branch), and if it possible to do so in a DB query. Thanks! Bitonator Django querysets allow you to use the "__" notation to access relationships. You can take it to any depth and read more about it here . Django offers a powerful and intuitive way to “follow” relationships in lookups, taking care of