From 5ef059eb40782f7c9b39c96edf77415d6091d129 Mon Sep 17 00:00:00 2001
From: hhs <386998068@qq.com>
Date: Tue, 23 Jun 2026 22:58:02 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E5=87=8F=E5=B0=91=E8=87=AA=E5=AE=9A?=
 =?UTF-8?q?=E4=B9=89=E6=83=85=E6=99=AF=E4=B8=AD=E6=95=B0=E6=8D=AE=E5=BA=93?=
 =?UTF-8?q?=E8=A1=A8=E5=AF=B9=20prompt=20=E7=9A=84=E7=BA=A6=E6=9D=9F?=
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---
 ...05_fix_user_scenarios_description.down.sql | 15 +++++++++++
 .../005_fix_user_scenarios_description.up.sql | 16 ++++++++++++
 check_constraints.sql                         |  9 +++++++
 fix_user_scenarios.sql                        | 26 +++++++++++++++++++
 4 files changed, 66 insertions(+)
 create mode 100644 backend/migrations/005_fix_user_scenarios_description.down.sql
 create mode 100644 backend/migrations/005_fix_user_scenarios_description.up.sql
 create mode 100644 check_constraints.sql
 create mode 100644 fix_user_scenarios.sql

diff --git a/backend/migrations/005_fix_user_scenarios_description.down.sql b/backend/migrations/005_fix_user_scenarios_description.down.sql
new file mode 100644
index 0000000..09a85ee
--- /dev/null
+++ b/backend/migrations/005_fix_user_scenarios_description.down.sql
@@ -0,0 +1,15 @@
+-- 005_fix_user_scenarios_description.down.sql
+-- 回滚：恢复原约束（description 必填，prompt 最小长度 50）
+
+-- 注意：如果表中存在不符合原约束的数据，此回滚会失败
+
+-- 1. 恢复 description 为必填
+ALTER TABLE user_scenarios
+    ALTER COLUMN description SET NOT NULL;
+
+-- 2. 恢复 prompt 最小长度为 50
+ALTER TABLE user_scenarios
+    DROP CONSTRAINT IF EXISTS check_prompt_length;
+
+ALTER TABLE user_scenarios
+    ADD CONSTRAINT check_prompt_length CHECK (char_length(prompt) >= 50 AND char_length(prompt) <= 2000);
diff --git a/backend/migrations/005_fix_user_scenarios_description.up.sql b/backend/migrations/005_fix_user_scenarios_description.up.sql
new file mode 100644
index 0000000..31f96c9
--- /dev/null
+++ b/backend/migrations/005_fix_user_scenarios_description.up.sql
@@ -0,0 +1,16 @@
+-- 005_fix_user_scenarios_description.up.sql
+-- 修复 user_scenarios 表约束：description 允许为空，prompt 最小长度改为 10
+
+-- 1. 允许 description 为空
+ALTER TABLE user_scenarios
+    ALTER COLUMN description DROP NOT NULL;
+
+-- 2. 修复 prompt 长度约束（从 50 改为 10，与代码一致）
+ALTER TABLE user_scenarios
+    DROP CONSTRAINT IF EXISTS check_prompt_length;
+
+ALTER TABLE user_scenarios
+    ADD CONSTRAINT check_prompt_length CHECK (char_length(prompt) >= 10 AND char_length(prompt) <= 2000);
+
+COMMENT ON COLUMN user_scenarios.description IS '简短描述，可选，显示在情景卡片上（允许为空）';
+COMMENT ON COLUMN user_scenarios.prompt IS '角色 System Prompt，定义 AI 行为（10-2000 字符）';
diff --git a/check_constraints.sql b/check_constraints.sql
new file mode 100644
index 0000000..f834ab6
--- /dev/null
+++ b/check_constraints.sql
@@ -0,0 +1,9 @@
+-- 检查 user_scenarios 表的所有约束
+SELECT
+    con.conname AS constraint_name,
+    con.contype AS constraint_type,
+    pg_get_constraintdef(con.oid) AS constraint_definition
+FROM pg_constraint con
+JOIN pg_class rel ON rel.oid = con.conrelid
+WHERE rel.relname = 'user_scenarios'
+ORDER BY con.conname;
diff --git a/fix_user_scenarios.sql b/fix_user_scenarios.sql
new file mode 100644
index 0000000..ab01b43
--- /dev/null
+++ b/fix_user_scenarios.sql
@@ -0,0 +1,26 @@
+-- 快速修复脚本：修复 user_scenarios 表约束
+-- 在生产 PostgreSQL 容器中执行此文件
+
+-- 1. 允许 description 为空
+ALTER TABLE user_scenarios
+    ALTER COLUMN description DROP NOT NULL;
+
+-- 2. 修复 prompt 长度约束（从 50 改为 10，与代码一致）
+ALTER TABLE user_scenarios
+    DROP CONSTRAINT IF EXISTS check_prompt_length;
+
+ALTER TABLE user_scenarios
+    ADD CONSTRAINT check_prompt_length CHECK (char_length(prompt) >= 10 AND char_length(prompt) <= 2000);
+
+-- 更新注释
+COMMENT ON COLUMN user_scenarios.description IS '简短描述，可选，显示在情景卡片上（允许为空）';
+COMMENT ON COLUMN user_scenarios.prompt IS '角色 System Prompt，定义 AI 行为（10-2000 字符）';
+
+-- 验证修改
+SELECT
+    con.conname AS constraint_name,
+    pg_get_constraintdef(con.oid) AS constraint_definition
+FROM pg_constraint con
+JOIN pg_class rel ON rel.oid = con.conrelid
+WHERE rel.relname = 'user_scenarios'
+    AND con.conname = 'check_prompt_length';