feat: init backend

src/backend/items/models.py

@@ -0,0 +1,68 @@
+from django.db import models
+from django.contrib.auth.models import User
+
+
+class Item(models.Model):
+    """物品模型"""
+    STATUS_CHOICES = [
+        ('available', '可用'),
+        ('in_use', '使用中'),
+        ('maintenance', '维护中'),
+        ('damaged', '损坏'),
+    ]
+
+    name = models.CharField(max_length=100, verbose_name='物品名称')
+    description = models.TextField(blank=True, verbose_name='物品描述')
+    serial_number = models.CharField(max_length=50, unique=True, verbose_name='序列号')
+    category = models.CharField(max_length=50, verbose_name='物品类别')
+    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='available', verbose_name='物品状态')
+    location = models.CharField(max_length=100, blank=True, verbose_name='存放位置')
+    purchase_date = models.DateField(null=True, blank=True, verbose_name='购买日期')
+    value = models.DecimalField(max_digits=10, decimal_places=2, null=True, blank=True, verbose_name='价值')
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
+    updated_at = models.DateTimeField(auto_now=True, verbose_name='更新时间')
+
+    class Meta:
+        verbose_name = '物品'
+        verbose_name_plural = '物品'
+        ordering = ['-created_at']
+
+    def __str__(self):
+        return f"{self.name} ({self.serial_number})"
+
+
+class ItemUsage(models.Model):
+    """物品使用记录模型"""
+    item = models.ForeignKey(Item, on_delete=models.CASCADE, verbose_name='物品')
+    user = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name='使用者')
+    start_time = models.DateTimeField(verbose_name='开始使用时间')
+    end_time = models.DateTimeField(null=True, blank=True, verbose_name='结束使用时间')
+    purpose = models.CharField(max_length=200, verbose_name='使用目的')
+    notes = models.TextField(blank=True, verbose_name='使用备注')
+    is_returned = models.BooleanField(default=False, verbose_name='是否已归还')
+    condition_before = models.CharField(max_length=200, blank=True, verbose_name='使用前状况')
+    condition_after = models.CharField(max_length=200, blank=True, verbose_name='使用后状况')
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name='记录创建时间')
+
+    class Meta:
+        verbose_name = '使用记录'
+        verbose_name_plural = '使用记录'
+        ordering = ['-start_time']
+
+    def __str__(self):
+        return f"{self.item.name} - {self.user.username} ({self.start_time.strftime('%Y-%m-%d %H:%M')})"
+
+
+class Category(models.Model):
+    """物品类别模型"""
+    name = models.CharField(max_length=50, unique=True, verbose_name='类别名称')
+    description = models.TextField(blank=True, verbose_name='类别描述')
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
+
+    class Meta:
+        verbose_name = '物品类别'
+        verbose_name_plural = '物品类别'
+        ordering = ['name']
+
+    def __str__(self):
+        return self.name