我们如何在django中呈现像这样的sql查询?
select * from question LEFT JOIN (select * from question_solved where username = 'ashu'
) AS result on question.q_id = result.q_id
我试着单独执行查询,
Q= question_solved.objects.filter(username='ashu')
Y= Question.objects.filter(q__q_id = Question.q_id)
但它给了我错误
djan
以下是我的Django模型:
from django.db import models
class MyModel(models.Model):
a = models.IntegerField()
b = models.IntegerField()
c = models.IntegerField()
我想检索这个模型的所有实例,其中a = 5和b + c > 10。我该怎么做呢?
当我尝试这个:
print MyModel.objects.filter(a=5).extra(
select={"total_count": "b +
为什么会出现这个错误?
我的Models.py:
# -*- coding: utf-8 -*-
from django.db import models
from sitem.ligler.models import *
from sitem.takimlar.models import *
from sitem.futbolcular.models import *
from sitem.stadyumlar.models import *
from sitem.ligmaclari.models import *
DAKIKA_SECIMLERI = [(str(dk), st
我有一个父母、名字和孩子的模特:
models.py
class Parent(models.Model):
title = models.CharField(max_length=250)
address = models.CharField(max_length=250)
class Name(models.Model):
title = models.CharField(max_length=250)
class Kid(models.Model):
family = models.ForeignKey(Parent)
name = mod
基本上,我想做一个get方法,当填充person_id时,用json格式列出那个人的所有地址。已经尝试过许多其他的方法,但没有一种接近。
models.py
from django.db import models
from django.core.validators import RegexValidator
# Create your models here.
class Address(models.Model):
zipcode = models.CharField(max_length=8)
state = models.CharField(max_length
我正在创建一个API,它接受模型的字段。说
from django.db import models
class Student(models.Model):
name = models.CharField(max_length=24)
age = models.IntegerField()
address = models.CharField(blank=True)
我想做一个API,这个API需要像这样的论点。
from typing import Optional, TypedDict
from models import Student
from django
我有一个模型:
from django.db import models
class Author(models.Model):
name = models.CharField(max_length=100)
age = models.IntegerField()
class Publisher(models.Model):
name = models.CharField(max_length=300)
num_awards = models.IntegerField()
class Book(models.Model):
name = model
我正在试着用Django做一个学生管理网站。现在我想要计算一个年级有多少学生,并在我的网站上显示这个数字。我该怎么做呢?我的模型: from django.db import models
import uuid
from django.core.validators import MaxValueValidator,
MinValueValidator
# Create your models here.
class Student(models.Model):
name = models.CharField(max_length=150)
roll = models.