Django打造在线教育平台_day_2：新建operation app 编写models

1、新建operationapp，Tools 工具栏运行 run manage.py Task，输入：

startapp operation

2、分析operation app，需要建立表如下。

　

3、编写operation/models.py

from datetime import datetime

from django.db import models

from users.models import UserProfile
from courses.models import Course

# Create your models here.

class UserAsk(models.Model):
    name = models.CharField(max_length=20, verbose_name=u'姓名')
    mobile = models.CharField(max_length=11, verbose_name=u'手机号')
    course_name = models.CharField(max_length=50, verbose_name=u'课程名')
    add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')

    class Meta:
        verbose_name = u'用户咨询'
        verbose_name_plural = verbose_name


class CourseComments(models.Model):
    """课程评论"""
    user = models.ForeignKey(UserProfile, verbose_name=u'用户')  # 引入外建，完成1对多的关系
    course = models.ForeignKey(Course, verbose_name=u'课程')
    comments = models.CharField(max_length=200, verbose_name=u'评论')
    add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')

    class Meta:
        verbose_name = u'课程评论'
        verbose_name_plural = verbose_name

class UserFavorite(models.Model):
    user = models.ForeignKey(UserProfile, verbose_name=u'用户')  # 引入外建，完成1对多的关系
    fav_id = models.IntegerField(default=0, verbose_name=u'数据id')
    fav_type = models.IntegerField(choices=((1,'课程'),(2,'课程机构'),(3,'讲师')), default=1, verbose_name=u'收藏类型')
    add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')

    class Meta:
        verbose_name = u'用户收藏'
        verbose_name_plural = verbose_name

class UserMessage(models.Model):
    user = models.IntegerField(default=0, verbose_name=u'接收用户') # default=id
    message = models.CharField(max_length=500, verbose_name=u'消息内容')
    has_read = models.BooleanField(default=False, verbose_name=u'是否已读') #默认未读
    add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')

    class Meta:
        verbose_name = u'用户消息'
        verbose_name_plural = verbose_name


class UserCourse(models.Model):
    user = models.ForeignKey(UserProfile, verbose_name=u'用户')  # 引入外建，完成1对多的关系
    course = models.ForeignKey(Course, verbose_name=u'课程')
    add_time = models.DateTimeField(default=datetime.now, verbose_name=u'添加时间')

    class Meta:
        verbose_name = u'用户课程'
        verbose_name_plural = verbose_name

4、在MxOnline/settings.py中注册app

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'users',  # 注册App
    'operation',
    'courses ',
    'organization ',
]

 5、在数据库生成新定义的表，Tools 工具栏运行 run manage.py Task输入：

makemigrations 
migrate