# Generated by Django 5.2.1 on 2025-05-23 10:58

import django.db.models.deletion
from django.conf import settings
from django.db import migrations, models


class Migration(migrations.Migration):

    initial = True

    dependencies = [
        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
    ]

    operations = [
        migrations.CreateModel(
            name='ChatHistory',
            fields=[
                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('knowledge_base_id', models.CharField(default='b680a4fa-37be-11f0-a7cb-0242ac120002', help_text='知识库ID，用于兼容原有结构', max_length=100)),
                ('conversation_id', models.CharField(db_index=True, max_length=100)),
                ('title', models.CharField(blank=True, default='New chat', help_text='对话标题', max_length=100, null=True)),
                ('parent_id', models.CharField(blank=True, max_length=100, null=True)),
                ('role', models.CharField(choices=[('user', '用户'), ('assistant', 'AI助手'), ('system', '系统')], max_length=20)),
                ('content', models.TextField()),
                ('tokens', models.IntegerField(default=0, help_text='消息token数')),
                ('metadata', models.JSONField(blank=True, default=dict, help_text='存储额外信息')),
                ('created_at', models.DateTimeField(auto_now_add=True)),
                ('is_deleted', models.BooleanField(default=False)),
                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
            ],
            options={
                'ordering': ['created_at'],
                'indexes': [models.Index(fields=['conversation_id', 'created_at'], name='chat_chathi_convers_90ca0c_idx'), models.Index(fields=['user', 'created_at'], name='chat_chathi_user_id_326d36_idx'), models.Index(fields=['conversation_id', 'is_deleted'], name='chat_chathi_convers_bcd094_idx')],
            },
        ),
    ]