from django.db import models

class Menu(models.Model):

    """

    菜单表

    """

    title = models.CharField(verbose_name='菜单名称',max_length=32,unique=True)

    icon = models.CharField(max_length=128, blank=True, null=True)

    def __str__(self):

        return self.title

class Permission(models.Model):

    """

    权限表

    """

    title = models.CharField(verbose_name='权限标题', max_length=32)

    url = models.CharField(verbose_name='含正则的URL', max_length=128)

    name=models.CharField(verbose_name='url别名',max_length=64,unique=True) #控制权限到按钮

    parent=models.ForeignKey(verbose_name='父权限',to='self',null=True,blank=True,on_delete=models.CASCADE,limit_choices_to={'parent__isnull':True})#构建非菜单权限关系，菜单默认展开

    menu=models.ForeignKey(verbose_name='菜单',to='Menu',null=True,blank=True,on_delete=models.CASCADE)

    def __str__(self):

        return self.title

class Role(models.Model):

    """

    角色

    """

    title = models.CharField(verbose_name='角色名称', max_length=32)

    permissions = models.ManyToManyField(verbose_name='拥有的所有权限', to='Permission', blank=True)

    def __str__(self):

        return self.title

class UserInfo(models.Model):

    """

    用户表

    """

    username = models.CharField(verbose_name='用户名', max_length=32)

    password = models.CharField(verbose_name='密码', max_length=64)

    email = models.CharField(verbose_name='邮箱', max_length=32)

    roles = models.ManyToManyField(verbose_name='拥有的所有角色', to=Role, blank=True)

    class Meta:

        abstract=True #为了crm的用户表进行继承

    def __str__(self):

        return self.username