from django.db import models


class PrimaryDepartment(models.Model):
    department_name = models.CharField(max_length=255, unique=True, blank=False, verbose_name='部门名称')
    description = models.TextField(blank=True, verbose_name='描述')

    class Meta:
        verbose_name = '一级部门表'
        verbose_name_plural = '一级部门表'

    def __str__(self):
        return self.department_name


class SecondaryDepartment(models.Model):
    primary_department = models.ForeignKey('PrimaryDepartment', on_delete=models.CASCADE, verbose_name='一级部门')
    department_name = models.CharField(max_length=255, blank=False, verbose_name='二级部门名称')
    description = models.TextField(blank=True, verbose_name='描述')

    class Meta:
        verbose_name = '二级部门表'
        verbose_name_plural = '二级部门表'
        unique_together = (('primary_department', 'department_name'),)  # 确保同一一级部门下的二级部门名称唯一

    def __str__(self):
        return f"{self.primary_department.department_name} - {self.department_name}"