models: Add chat tables

api/products/migrations/0105_chatsession_chatmessage.py

@@ -0,0 +1,37 @@
+# Generated by Django 4.2.23 on 2025-08-23 20:39
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('products', '0104_alter_datalabel_name'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ChatSession',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('session_id', models.CharField(db_index=True, max_length=128, unique=True, verbose_name='会话ID')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='创建时间')),
+                ('consumer', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='chat_sessions', to='products.consumerinfo', verbose_name='消费者')),
+                ('tenant', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='chat_sessions', to='products.tenant', verbose_name='租户')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='ChatMessage',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('role', models.CharField(choices=[('user', '用户'), ('assistant', '助手'), ('system', '系统')], max_length=20, verbose_name='角色')),
+                ('message_type', models.CharField(choices=[('text', '文本'), ('image', '图片'), ('file', '文件'), ('system', '系统消息'), ('ai_response', 'AI回复')], default='text', max_length=20, verbose_name='消息类型')),
+                ('text_content', models.TextField(verbose_name='消息内容')),
+                ('file_oss_bucket', models.TextField(blank=True, null=True, verbose_name='文件OSS桶')),
+                ('file_oss_path', models.TextField(blank=True, null=True, verbose_name='文件OSS路径')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='发送时间')),
+                ('session', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='messages', to='products.chatsession', verbose_name='会话')),
+            ],
+        ),
+    ]

api/products/models.py

@@ -441,4 +441,33 @@ class DataLabel(models.Model):
     description = models.TextField(verbose_name="描述")
 
     def __str__(self):
-        return f"{self.name}: created {self.create_time} updated {self.update_time}"
+        return f"{self.name}: created {self.create_time} updated {self.update_time}"
+
+class ChatSession(models.Model):
+    session_id = models.CharField(max_length=128, unique=True, db_index=True, verbose_name="会话ID")
+    tenant = models.ForeignKey(Tenant, related_name="chat_sessions", null=True, blank=True, on_delete=models.CASCADE, verbose_name="租户")
+    consumer = models.ForeignKey(ConsumerInfo, related_name="chat_sessions", null=True, blank=True, on_delete=models.CASCADE, verbose_name="消费者")
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
+
+class ChatMessage(models.Model):
+    MESSAGE_TYPE_CHOICES = [
+        ('text', '文本'),
+        ('image', '图片'),
+        ('file', '文件'),
+        ('system', '系统消息'),
+        ('ai_response', 'AI回复'),
+    ]
+    
+    ROLE_CHOICES = [
+        ('user', '用户'),
+        ('assistant', '助手'),
+        ('system', '系统'),
+    ]
+    
+    session = models.ForeignKey(ChatSession, related_name="messages", on_delete=models.CASCADE, verbose_name="会话")
+    role = models.CharField(max_length=20, choices=ROLE_CHOICES, verbose_name="角色")
+    message_type = models.CharField(max_length=20, choices=MESSAGE_TYPE_CHOICES, default='text', verbose_name="消息类型")
+    text_content = models.TextField(verbose_name="消息内容")
+    file_oss_bucket = models.TextField(null=True, blank=True, verbose_name="文件OSS桶")
+    file_oss_path = models.TextField(null=True, blank=True, verbose_name="文件OSS路径")
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name="发送时间")