AttributeError: module 'django.db.models' has no attribute 'SubfieldBase' http://www.guanggua.com/question/35166085-How-to-deal-with-SubfieldBase-has-been-deprecated-Use-Fieldfrom_db_value-instead.html 说的很详细,后期会整理…

F() 的执行不经过 python解释器,不经过本机内存,是生成 SQL语句的执行. # Tintin filed a news story! reporter = Reporters.objects.get(name='Tintin') reporter.stories_filed += 1 reporter.save() # 等于 from django.db.models import F reporter = Reporters.objects.get(name='Tintin') re…

问题:在mysql中查询数据时,代码如下: skus = category.sku_set.filter(is_launched=True).order_by(sort_field) skus 取不到数据,提示 skus: Unable to get repr for <class 'django.db.models.query.QuerySet'> 解决: 多方查找,是因为,原模型类中的 default_image_url = models.CharField(max_length=200,…

错误描述: 一对一反向查询失败! 前提: Course和CourseDetail    OneToOne 原因: Course数据和CourseDetail数据没有一一对应.…

Enrollment has no customer.…

Models 数据库的配置 1    django默认支持sqlite,mysql, oracle,postgresql数据库 <1>sqlite django默认使用sqlite的数据库,默认自带sqlite的数据库驱动 引擎名称:django.db.backends.sqlite3 <2>mysql 引擎名称:django.db.backends.mysql 2    mysql驱动程序 MySQLdb(mysql python) mysqlclient MySQL PyMyS…

报错现象 在使用 django 创建 超级用户的时候提示报错 Password (again): ytyt521521 Traceback (most recent call last): File "C:\Users\Python\Envs\testvir2\lib\site-packages\django\db\backends\utils.py", line 64, in execute return self.cursor.execute(sql, params) File &…

前提: app名称为core,models.py 如下: #coding: utf8 import datetime from django.db import models class Order(models.Model): orderid = models.CharField(max_length=64, unique=True) desc = models.CharField(max_length=512) product = models.CharField(max_length=51…

Python 2.7.10,django 1.8.6 外键关联:http://www.bubuko.com/infodetail-618303.html 字段属性:http://www.cnblogs.com/lhj588/archive/2012/05/24/2516040.html 过滤条件:http://www.douban.com/note/301166150/ django模型很强大,可以通过外键实现: 1.主表查询子表 2.子表查询主表 3.主表查询主表(多对多情况) 下面举例中表A…

Models A model is the single, definitive source of information about your data. It contains the essential fields and behaviors of the data you're storing. Generally, each model maps to a single database table. The basics: Each model is a Python class…