81 lines
3.0 KiB
PL/PgSQL
81 lines
3.0 KiB
PL/PgSQL
-- =====================================================================================
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-- Trigger Function: handle_new_user
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-- Version: v3
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-- Purpose: auth.users 新用户创建后，同步写入 public.ak_users（权威）和 public.user_roles（兼容）。
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-- 此版本修复了向 user_roles 写入时可能因 role 为 NULL 导致的 NOT NULL 约束失败问题。
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-- Security: SECURITY DEFINER + 固定 search_path
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-- Depends:
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-- - public.ak_users(auth_id,email,username,role)
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-- - public.user_roles(user_id,role)
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-- =====================================================================================
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CREATE OR REPLACE FUNCTION public.handle_new_user()
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RETURNS trigger
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LANGUAGE plpgsql
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SECURITY DEFINER
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SET search_path = public
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AS $$
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DECLARE
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user_role TEXT;
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user_email TEXT := NEW.email;
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user_name TEXT;
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has_user_roles BOOLEAN := FALSE;
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BEGIN
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-- 1) 基于邮箱规则分配默认角色（可按需调整）
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-- 确保 user_role 总有一个非 NULL 的值
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user_role := CASE
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WHEN user_email ILIKE '%@admin.%' THEN 'admin'
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WHEN user_email ILIKE '%@teacher.%' OR user_email ILIKE '%@edu.%' THEN 'teacher'
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ELSE 'consumer' -- 默认角色
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END;
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-- 2) 默认 username：取邮箱 @ 前缀
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IF user_email IS NOT NULL AND POSITION('@' IN user_email) > 1 THEN
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user_name := SPLIT_PART(user_email, '@', 1);
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ELSE
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user_name := 'user_' || SUBSTRING(NEW.id::text, 1, 8); -- 使用 user_ + uid前8位作为备用名
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END IF;
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-- 3) 写入 ak_users（权威）
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-- 使用 ON CONFLICT 确保幂等：同一 auth_id 只会有一条记录
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INSERT INTO public.ak_users (auth_id, email, username, role)
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VALUES (NEW.id, user_email, user_name, user_role)
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ON CONFLICT (auth_id)
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DO UPDATE SET
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email = COALESCE(EXCLUDED.email, public.ak_users.email),
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username = COALESCE(EXCLUDED.username, public.ak_users.username),
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-- 只有当现有 role 为空时才更新，避免覆盖手动设置的 admin 角色
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role = COALESCE(public.ak_users.role, EXCLUDED.role),
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updated_at = now();
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-- 4) 兼容写入 user_roles（如果表存在）
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SELECT EXISTS (
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SELECT 1
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FROM information_schema.tables
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WHERE table_schema='public'
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AND table_name='user_roles'
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) INTO has_user_roles;
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IF has_user_roles THEN
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BEGIN
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-- 确保插入的 role 不为 NULL，即使上面的逻辑有误
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INSERT INTO public.user_roles (user_id, role, created_by)
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VALUES (NEW.id, COALESCE(user_role, 'customer'), NEW.id);
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EXCEPTION
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WHEN unique_violation THEN
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-- 忽略重复插入的错误
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NULL;
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WHEN not_null_violation THEN
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-- 记录非空约束错误，但不中断整个触发器
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RAISE NOTICE '[handle_new_user] WARNING: Failed to INSERT into user_roles due to NOT NULL violation. user_id: %, role: %', NEW.id, user_role;
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END;
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END IF;
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-- 5) 更新 auth.users 元数据（可选保留）
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UPDATE auth.users
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SET raw_user_meta_data = COALESCE(raw_user_meta_data, '{}'::jsonb) || jsonb_build_object('user_role', user_role)
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WHERE id = NEW.id;
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RETURN NEW;
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END;
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$$; |