django-models

问题 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

问题 I have Book, Profile, Book_stat model as below. I am trying to minimize the fields from Book model and prefetch_related method to get the data from Book_stat model. models.py class Book(models.Model): title = models.CharField(max_length=200) image = models.FileField(upload_to="mp/", blank=True) def __str__(self): return self.title class Profile(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) full_name = models.CharField(max_length=150) def __str__(self): return self

问题 Env: Django 1.5.1 + Django CMS 2.4.1 + Zinnia latest + my custom apps + custom Django CMS plugin Basically I can extend the default Django (1.5.X) User model like Django Ribbit Tutorial on NetTuts+ or Substitute a completely customized model like Django Dev doc or Django2Scoops example in the paragraph: "Dealing With the User Model" To test I decided for Subclass AbstractUser From Django2Scoops book:"Choose this option if you like Django’s User model fields the way they are, but need extra .

问题 I have a model that holds user address. This model has to have first_name and last_name fields since one would like to set address to a recipient (like his company etc.). What I'm trying to achieve is: if the fist_name/last_name field in the address is filled - return simply that field if the fist_name/last_name field in the address is empty - fetch corrresponding field data from a foreignkey pointing to a proper django.auth.models.User I'd like this to be treated as normal django field that

问题 I've a model from django.contrib.auth.models import User class ModelA(models.Model): phone = models.CharField(max_length=20) user = models.ForeignKey(User) I need to insert the data into this model. I've an endpoint hosted which provides me the following data {'phone':XXXXXXXX, 'user_id':123} . Now when I insert the data into this model like obj = ModelA.objects.create(phone=data['phone'], user = data['user_id] It throws an error saying Cannot assign "u'123'": "ModelA.user" must be a "User"

问题 Is there a GUI tool using which I can design new Django models graphically? For example, drawing lines between fields in different models to indicate a foreign key. Modifying existing models graphically would also be nice. 回答1: uml-to-django might be of interest to you, though I can't personally vouch for it. 回答2: Another suggestion is found in Django Builder, you can define a model and the builder will get all your program needs such as views, serializers, urls, tests, admins, forms, and

问题 I'm trying to get my models related using ReferenceProperty, but not have a huge amount of luck. I have 3 levels: Group, Topic, then Pros, and Cons. As in a Group houses many topics, and within each topic could be many Pros and Cons. I am able to store new Groups nice and fine, but I don't have any idea how to store topics underneath these groups. I want to link from a page with a link "New topic" underneath each group, that takes them to a simple form (1 field for now). Obviously the URL

问题 I currently have a couple of models set up like this: from django.db import models class Child(models.Model): child_name = models.CharField(max_length=200) class Parent(models.Model): parent_name = models.CharField(max_length=200) child = models.OneToOneField(Child, null=True, blank=True) Unfortunately this is wrong, because I want a delete on the parent to cascade to the child and not vice-versa, so I really should have them set up like this: class Parent(models.Model): parent_name = models

问题 I currently have a couple of models set up like this: from django.db import models class Child(models.Model): child_name = models.CharField(max_length=200) class Parent(models.Model): parent_name = models.CharField(max_length=200) child = models.OneToOneField(Child, null=True, blank=True) Unfortunately this is wrong, because I want a delete on the parent to cascade to the child and not vice-versa, so I really should have them set up like this: class Parent(models.Model): parent_name = models

问题 I currently have a couple of models set up like this: from django.db import models class Child(models.Model): child_name = models.CharField(max_length=200) class Parent(models.Model): parent_name = models.CharField(max_length=200) child = models.OneToOneField(Child, null=True, blank=True) Unfortunately this is wrong, because I want a delete on the parent to cascade to the child and not vice-versa, so I really should have them set up like this: class Parent(models.Model): parent_name = models