更新

Python-100-Days/Day41-55/oa/hrs/models.py

@@ -0,0 +1,34 @@
+from django.db import models
+
+# ORM - 对象关系映射
+# 对象模型  <--->   关系模型
+# 实体类    <--->   二维表
+# 属性      <--->   列
+# 对象      <--->   记录
+
+
+class Dept(models.Model):
+    no = models.IntegerField(primary_key=True, verbose_name='部门编号')
+    name = models.CharField(max_length=20, verbose_name='部门名称')
+    location = models.CharField(max_length=10, verbose_name='部门所在地')
+    excellent = models.BooleanField(default=0, verbose_name='是否优秀')
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        db_table = 'tb_dept'
+
+
+class Emp(models.Model):
+    no = models.IntegerField(primary_key=True)
+    name = models.CharField(max_length=20)
+    job = models.CharField(max_length=10)
+    mgr = models.ForeignKey('self', null=True, blank=True, on_delete=models.SET_NULL)
+    # mgr = models.IntegerField(null=True, blank=True)
+    sal = models.DecimalField(max_digits=7, decimal_places=2)
+    comm = models.DecimalField(max_digits=7, decimal_places=2, null=True, blank=True)
+    dept = models.ForeignKey(Dept, on_delete=models.PROTECT)
+
+    class Meta:
+        db_table = 'tb_emp'