train_django/even_table/models.py

from django.contrib.auth.models import User
from django.db import models
from mptt.fields import TreeForeignKey
from mptt.models import MPTTModel


# 部门表
class Dept(MPTTModel):
    name = models.CharField(max_length=50)
    parent = TreeForeignKey('self', on_delete=models.CASCADE, null=True, blank=True, related_name='children')

    class Meta:
        verbose_name = '部门表'


# 岗位表
class Jobs(models.Model):
    name = models.CharField(max_length=50)

    class Meta:
        verbose_name = '岗位表'


# 部门表 2 岗位表 关联表
class Dept2Jobs(models.Model):
    # 得到指定model的外键，会拿主键当外键，比如id，然后会在数据库生成字段后+ '_id'
    dept = models.ForeignKey('Dept', on_delete=models.CASCADE, blank=True, null=True)
    job = models.ForeignKey('Jobs', on_delete=models.CASCADE, blank=True, null=True)
    user = models.ForeignKey(User, on_delete=models.CASCADE, blank=True, null=True)

    class Meta:
        verbose_name = '部门岗位关联表'