修复若干bug，优化若干代码

apps/history/models.py

@@ -1,14 +1,15 @@
 from django.db import models
 from django.core.validators import MaxValueValidator, MinValueValidator
 from datetime import datetime
-
+from utils.ImageStorage import ImageStorage
 
 class Department(models.Model):
-    id = models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='部门ID')
+    id = models.BigAutoField(auto_created=True, primary_key=True, verbose_name='部门ID')
     # did = models.IntegerField("部门ID")
     department_cn = models.CharField("部门名称", max_length=10)  # 如“程序部”
     department_en = models.CharField("部门英文名称", max_length=30)  # 如“程序部”
-    picture = models.ImageField(verbose_name="部门图标", default=0)
+    icon = models.ImageField(verbose_name="部门图标", default=0,storage=ImageStorage())
+    background = models.ImageField(verbose_name="部门图标", default=0, storage=ImageStorage())
     content = models.CharField("内容", max_length=800)  # 如部门介绍/部门要求
     introduction = models.CharField("介绍", max_length=800)  # 如部门介绍/部门要求
     status = models.SmallIntegerField("部门状态", choices=[(0, "解散"), (1, "健在")], default=1)
@@ -25,7 +26,7 @@ class History(models.Model):
     # grade = models.IntegerField("年级")
     years = models.IntegerField("年份", default=int(datetime.now().strftime('%Y')), validators=[
         MaxValueValidator(2300),
-        MinValueValidator(2010)
+        MinValueValidator(2000)
     ])
     # did = models.IntegerField("部门ID")
     # did = models.ForeignKey(Department, on_delete=models.DO_NOTHING(), related_name="history", verbose_name="部门id")
@@ -37,14 +38,17 @@ class History(models.Model):
         verbose_name_plural = '历史表'
 
     def __str__(self):
-        return self.department
+        return self.department.department_cn
 
 
 class Members(models.Model):
     # 默认id作为成员id
-    avatar = models.ImageField("头像", upload_to="avatar", blank=True)
+    avatar = models.ImageField("头像", upload_to="avatar", blank=True,default="default/user.jpg",storage=ImageStorage())
     # did = models.IntegerField("所属部门ID", default=0)
-    grade = models.IntegerField("年级")
+    years = models.IntegerField("加入社团年份", default=int(datetime.now().strftime('%Y')), validators=[
+        MaxValueValidator(2300),
+        MinValueValidator(2000)
+    ])
     name = models.CharField("成员姓名", max_length=10)
     motto = models.CharField("座右铭", max_length=30)
     # department_cn = models.CharField("所属部门", max_length=10)