crm项目建表：

from django.db import models
#导入django自带的用户认证模块：
from django.contrib.auth.models import User

# Create your models here.

class UserProfile(models.Model):
    """用户信息表"""
    #文件关联：
    user = models.ForeignKey(User)
    name = models.CharField(max_length=64,verbose_name="姓名")    #verbose_name是admin提示
    role = models.ManyToManyField("Role",blank=True,null=True)    #多对多
    def __str__(self):
        """
        :return:    返回文本
        """
        return self.name

class Role(models.Model):
    """角色表"""
    name = models.CharField(max_length=64,unique=True)
    def __str__(self):
        return self.name

class CustomerInfo(models.Model):
    """客户信息表"""
    name = models.CharField(max_length=64,default=None)
    contact_type_choices = ((0,"qq"),(1,"微信"),(2,"手机"))
    contact_type = models.SmallIntegerField(choices=contact_type_choices,default=0)        #SmallIntegerField小整数、0-65535
    contact = models.CharField(max_length=64,unique=True)
    source_choices = ((0,"QQ群"),
                     (1,"51CTO"),
                     (2,"百度推广"),
                     (3,"知乎"),
                     (4,"转介绍"),
                     (5,"其他"),
                     )
    source = models.SmallIntegerField(choices=source_choices)
    referral_from = models.ForeignKey("self",blank=True,null=True,verbose_name="转介绍")
    consult_courses = models.ManyToManyField("Course",verbose_name="咨询课程")
    consult_content = models.TextField(verbose_name="咨询内容")
    status_choices = ((0,"未报名"),(1,"已报名"),(2,"已退学"))
    status = models.SmallIntegerField(choices=status_choices)
    consultant = models.ForeignKey("UserProfile",verbose_name="课程顾问")
    date = models.DateField(auto_now_add=True)
    def __str__(self):
        return self.name

class Student(models.Model):
    """学员表"""
    customer = models.ForeignKey("CustomerInfo")
    class_grades = models.ManyToManyField("ClassList")
    def __str__(self):
        return self.customer

class CustomerFollowUp(models.Model):
    """客户跟踪记录表"""
    customer = models.ForeignKey("CustomerInfo")
    content = models.TextField(verbose_name="跟踪内容")
    user = models.ForeignKey("UserProfile",verbose_name="跟进人")
    status_choices = ((0,"近期无报名计划"),
                      (1,"一个月内报名"),
                      (2,"2周内报名"),
                      (3,"已报名"),
                      )
    status = models.SmallIntegerField(choices=status_choices)
    date = models.DateField(auto_now_add=True)
    def __str__(self):
        return self.content

class Course(models.Model):
    """课程表"""
    name = models.CharField(verbose_name="课程名称",max_length=64,unique=True)
    price = models.PositiveSmallIntegerField()                                          #PositiveSmallIntegerField必须为正
    period = models.PositiveSmallIntegerField(verbose_name="课程周期(月)",default=5)    #period周期/句号
    outline = models.TextField(verbose_name="大纲")
    def __str__(self):
        return self.name

class ClassList(models.Model):
    """班级列表"""
    branch = models.ForeignKey("Branch")
    course = models.ForeignKey("Course")
    class_type_choices = ((0,"脱产"),
                          (1,"周末"),
                          (2,"网络班"),
                          )
    class_type = models.SmallIntegerField(choices=class_type_choices,default=0)
    semester = models.SmallIntegerField(verbose_name="学期")
    teachers = models.ManyToManyField("UserProfile",verbose_name="讲师")
    start_date = models.DateField("开班日期")
    graduate_date = models.DateField("毕业日期",blank=True,null=True)
    def __str__(self):
        return "%s(%s)期" %(self.course.name,self.semester)
    class Meta:
        """联合唯一"""
        unique_together = ("branch","class_type","course","semester")                                     #unique_together联合唯一

class CourseRecord(models.Model):
    """上课记录"""
    class_grate = models.ForeignKey("ClassList",verbose_name="上课班级")
    day_num = models.PositiveSmallIntegerField(verbose_name="课程节次")
    teacher = models.ForeignKey("UserProfile")
    title = models.CharField("本节主题",max_length=64)
    content = models.TextField("本节内容")
    has_homework = models.BooleanField("本节有作业",default=True)
    homework = models.TextField("作业需求",blank=True,null=True)
    date = models.DateTimeField(auto_now_add=True)                                      #DateTimeField日期时间字段
    def __str__(self):
        return "%s第(%s)节" %(self.class_grate,self.day_num)
    class Meta:
        unique_together = ("class_grades","day_num")

class StudyRecord(models.Model):
    """学习记录表"""
    course_record = models.ForeignKey("CourseRecord")
    student = models.ForeignKey("Student")
    score_choices = ((100,"A+"),
                     (90,"A"),
                     (85,"B+"),
                     (80,"B"),
                     (75,"B-"),
                     (70,"C+"),
                     (60,"C"),
                     (40,"C-"),
                     (-50,"D"),
                     (0,"N/A"),                                                         #N/A是not avaliable
                     (-100,"COPY"),
                     )
    score = models.SmallIntegerField(choices=score_choices,default=0)
    show_choices = ((0,"缺勤"),
                    (1,"已签到"),
                    (2,"迟到"),
                    (3,"早退"),
                    )
    show_status = models.SmallIntegerField(choices=show_choices,default=1)
    note = models.TextField("成绩备注",blank=True,null=True,max_length=1024)
    date = models.DateTimeField(auto_now_add=True)
    def __str__(self):
        return "%s %s %s" %(self.course_record,self.student,self.score)

class Branch(models.Model):
    """校区"""
    name = models.CharField(max_length=64,unique=True)
    addr = models.CharField(max_length=128,blank=True,null=True)
    def __str__(self):
        return self.name