1 Help with Django Query 2 Django, query question 1 Query related models 1 How to make this django model query 2 Complex Django model query 1 Make a query to django models 0 Django query using through model 0 Queries in Django Models 1 Django querying models 1 Model querys ...
I'm developing a Django project. I need to make many queries with the following pattern: I have two models, not related by a FK, but that can be related by some fields (not their PKs). I need to query the first model, and annotate it with results from the second model, joined by...
When iterating over a model that contains a foreign key, be careful with the way you access values on related models. Accidentally resolving a foreign key or iterating over a back-reference can cause N+1 query behavior. When you create a foreign key, such as Tweet.user, you can use the...
While excluding directly on a GenericRelation's DateTimeField works (see c3 variable below), it does fail if there is a related object in between (c4). This does not occur if lookup is done on a CharField (c1 and c2). Here are simple models to illustrate: from django.db import models...
The Django Admin Generator automatically generates (scaffolds) a fully functioning Django admin by introspecting and querying your models - wolph/django-admin-generator
models.py from django.db import models class Person(models.Model): name = models.CharField(max_length=25) class Book(models.Model): foo = models.ForeignKey(Person, db_constraint=False, on_delete=models.DO_NOTHING, related_name='foo') bar = models.ForeignKey(Person, db_constraint=False, ...
2019-09-29 10:54 − model 分两类,一是全局 model,二是页面 model。全局 model 存于 /src/models/ 目录,所有页面都可引用;页面 model 不能被其他页面所引用。 规则如下: src/models/**/*.js 为 global model src/... 思考的大腿 0 4853 Django...
I currently have 2 models as such class Recipe(models.Model): account = models.ForeignKey(CustomUser, on_delete=models.CASCADE, null=True, blank=True) name = models.TextField(null=True, blank=True) slug = models.SlugField(null=False, blank=True, unique=True) image_path = models.ImageField...
from django.db.models import Q def find_user_by_name(query_name): qs = User.objects.all() for term in query_name.split(): qs = qs.filter( Q(first_name__icontains = term) | Q(last_name__icontains = term)) return qs Where query_name could be "John Smith" (but would also ...
I am sing Django 3.2 I have a model like this: class MyModel(models.Model): name = models.CharField(max_length=255) num_visits = models.PositiveSmallNumber() created_at = models.DateTimeField() class Meta: ordering = ['created_at'] I want to select the first N rows whe...