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Go项目实战/01_数据模型建立/Mermaid ER 图.md

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+---
+tags: []
+date created: 星期日, 十二月 7日 2025, 1:31:36 下午
+date modified: 星期日, 十二月 7日 2025, 1:32:46 下午
+---
+
+```mermaid
+erDiagram
+    users ||--o{ user_roles : "assigns"
+    roles ||--o{ user_roles : "assigned to"
+    roles ||--o{ role_permissions : "grants"
+    permissions ||--o{ role_permissions : "granted to"
+    
+    users {
+        bigint id PK "主键 (BigSerial)"
+        string username "用户名 (唯一)"
+        string password_hash "哈希密码 (Argon2/Bcrypt)"
+        string email "邮箱 (可选，唯一)"
+        string nickname "昵称"
+        string avatar_url "头像URL"
+        text bio "简介"
+        string status "状态 (active/inactive/banned)"
+        timestamptz created_at "创建时间"
+        timestamptz updated_at "更新时间"
+        timestamptz deleted_at "软删除时间"
+    }
+    
+    roles {
+        bigint id PK "主键 (BigSerial)"
+        string code "角色代码 (admin/editor/user)"
+        string name "角色名称"
+        text description "角色描述"
+        boolean is_system "系统角色（不可删除）"
+        timestamptz created_at "创建时间"
+        timestamptz updated_at "更新时间"
+        timestamptz deleted_at "软删除时间"
+    }
+    
+    permissions {
+        bigint id PK "主键 (BigSerial)"
+        string code "权限代码 (module:action:scope)"
+        string name "权限名称"
+        text description "权限描述"
+        string category "权限分类"
+        timestamptz created_at "创建时间"
+        timestamptz updated_at "更新时间"
+        timestamptz deleted_at "软删除时间"
+    }
+    
+    user_roles {
+        bigint id PK "主键 (BigSerial)"
+        bigint user_id FK "用户ID"
+        bigint role_id FK "角色ID"
+        timestamptz created_at "关联时间"
+        timestamptz updated_at "更新时间"
+    }
+    
+    role_permissions {
+        bigint id PK "主键 (BigSerial)"
+        bigint role_id FK "角色ID"
+        bigint permission_id FK "权限ID"
+        timestamptz created_at "关联时间"
+        timestamptz updated_at "更新时间"
+    }
+```