# foodie_server Development Guidelines

Auto-generated from all feature plans. Last updated: 2026-05-15

## Tech Stack

- **后端**: Java (Spring Boot, MyBatis with XML mappers)
- **前端**: Vue.js (Element UI)
- **支持语言**: Vietnamese (vi), Simplified Chinese (zh), Traditional Chinese (tw), English (en)
- **数据库**: MySQL
- **开发环境**: Windows

## Project Structure

```text
平台管理前端代码路径：E:\QtwCode\foodie\foodie-admin-vue
商家端管理前端代码路径：E:\QtwCode\foodie\foodie-store
```

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## 前端多语言(i18n)添加规范

**所有前端新功能必须实现多语言，不例外。** 平台管理端(foodie-admin-vue)和商家端(foodie-store) 新增的任何面向用户的文字都必须使用 `$t()` 而非硬编码中文。

商家端(foodie-store)使用 vue-i18n，语言文件在 `src/lang/` 下（zh.js、tw.js、en.js、vi.js）。

**添加多语言 key 时必须注意：**

1. **先确认 key 所属的对象层级。** 语言文件中有多层嵌套对象（如 `foots:{}`、`cuxiao:{}`、`fenlei:{}` 等），使用 `$t('foots.XXX')` 的 key 必须添加到 `foots` 对象**内部**，不能加到文件顶部或其它对象里。
2. **找到该对象的最后一个属性**（通过 grep 或阅读文件定位），在其后追加新 key，确保逗号正确（中间属性末尾要有逗号，最后一个属性无逗号）。
3. **四个语言文件（zh.js、tw.js、en.js、vi.js）都要添加**，缺一不可。
4. **key 必须使用有意义的英文单词**（驼峰命名），禁止使用 `text1`、`text2`、`text55` 等无意义序号。例如：按钮用 `orderBtn`，标题用 `orderDialogTitle`，状态用 `diningStatus`。四个语言文件的 key 名称必须完全一致。

**曾经犯的错误：** 把 `AddCategoryFirst` 加到了文件第 141 行的公共区域，而 `$t('foots.AddCategoryFirst')` 是在 `foots` 对象（第 190+ 行）下查找，导致页面显示原始 key 而非翻译文本。

## 前端文件编辑注意事项

前端项目（foodie-store、foodie-admin-vue）的文件使用 **CRLF 换行符**（Windows 风格 `\r\n`）。使用编辑工具进行字符串替换时，由于换行符不匹配会导致 "String to replace not found" 错误。

**正确做法：** 编辑前端文件时，使用 Python 脚本（`python << 'PYEOF'`）通过 `content.replace()` 或行号操作来修改文件内容，避免换行符匹配问题。

## 越南盾(VND)货币格式化

所有展示给越南用户的货币/金额必须使用**整数格式**（无小数位），因为越南盾不使用分。Java 计算使用 `.setScale(0, RoundingMode.HALF_UP)`，JS 格式化使用 `Math.floor()` 或 `parseInt()`。

## 数据库变更管理

所有数据库变更（ALTER TABLE、数据迁移等）**不直接执行**，必须写入 `updatesql/sql.md` 文件。由开发者统一到数据库手动执行。SQL 语句需标注日期和用途注释，例如：

```sql
-- 2026-05-15 订单状态四字段分离
ALTER TABLE pos_order ADD COLUMN delivery_status BIGINT DEFAULT NULL COMMENT '配送状态';
```

## 全栈字段添加清单

添加新字段到实体时，必须按顺序更新以下所有层级：
1. Java 实体类（Entity）
2. MyBatis XML mapper（resultMap + 相关的 select/insert/update 语句）
3. DTO 类（如适用）
4. Service 层业务逻辑
5. Controller 层接口
6. 前端 Vue 组件
7. 四个 i18n 语言文件（vi.js、zh.js、tw.js、en.js）
8. SQL 迁移脚本

## 范围控制

当用户说"只改 X"时，就只改 X——不要广泛探索、创建任务或为简单的定向修改启动 Agent。从用户提到的具体文件或区域开始，做最小的必要修改。

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# CLAUDE.md

Behavioral guidelines to reduce common LLM coding mistakes. Merge with project-specific instructions as needed.

**Tradeoff:** These guidelines bias toward caution over speed. For trivial tasks, use judgment.

## 1. Think Before Coding

**Don't assume. Don't hide confusion. Surface tradeoffs.**

Before implementing:
- State your assumptions explicitly. If uncertain, ask.
- If multiple interpretations exist, present them - don't pick silently.
- If a simpler approach exists, say so. Push back when warranted.
- If something is unclear, stop. Name what's confusing. Ask.

## 2. Simplicity First

**Minimum code that solves the problem. Nothing speculative.**

- No features beyond what was asked.
- No abstractions for single-use code.
- No "flexibility" or "configurability" that wasn't requested.
- No error handling for impossible scenarios.
- If you write 200 lines and it could be 50, rewrite it.

Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.

## 3. Surgical Changes

**Touch only what you must. Clean up only your own mess.**

When editing existing code:
- Don't "improve" adjacent code, comments, or formatting.
- Don't refactor things that aren't broken.
- Match existing style, even if you'd do it differently.
- If you notice unrelated dead code, mention it - don't delete it.

When your changes create orphans:
- Remove imports/variables/functions that YOUR changes made unused.
- Don't remove pre-existing dead code unless asked.

The test: Every changed line should trace directly to the user's request.

## 4. Goal-Driven Execution

**Define success criteria. Loop until verified.**

Transform tasks into verifiable goals:
- "Add validation" → "Write tests for invalid inputs, then make them pass"
- "Fix the bug" → "Write a test that reproduces it, then make it pass"
- "Refactor X" → "Ensure tests pass before and after"

For multi-step tasks, state a brief plan:
```
1. [Step] → verify: [check]
2. [Step] → verify: [check]
3. [Step] → verify: [check]
```

Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.

---

**These guidelines are working if:** fewer unnecessary changes in diffs, fewer rewrites due to overcomplication, and clarifying questions come before implementation rather than after mistakes.