372 lines
8.2 KiB
Markdown
372 lines
8.2 KiB
Markdown
# 8.3 分页查询规范
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:::tip 概述
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所有分页接口遵循统一的参数命名和返回结构。分页由 `BaseController::_index()` → `BaseLogic::pageList()` 实现,前端只需传标准参数即可获得分页数据。
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:::
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## 请求参数
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| 参数 | 类型 | 默认值 | 说明 |
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|------|------|--------|------|
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| `pageNo` | number | 1 | 页码(最小为 1) |
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| `pageSize` | number | 20 | 每页条数(1~100) |
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| `orderField` | string | - | 排序字段(camelCase,如 `createTime`) |
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| `orderType` | string | `desc` | 排序方向(`asc` / `desc`) |
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| `fields` | string | - | 返回字段(逗号分隔,如 `id,username,realname`) |
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| 其他参数 | - | - | 按 Logic 中配置的 `pageLikeFields` / `pageEqFields` 自动匹配 |
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### 分页参数边界限制
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| 参数 | 最小值 | 最大值 | 默认值 | 超出处理 |
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|------|--------|--------|--------|---------|
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| `pageNo` | 1 | - | 1 | 小于 1 时强制为 1 |
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| `pageSize` | 1 | 100 | 20 | 超出范围时限制在 1~100 |
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## 请求示例
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```bash
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# 基本分页
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GET /api/example/page?pageNo=1&pageSize=10
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# 带模糊搜索(LIKE)
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GET /api/example/page?pageNo=1&pageSize=10&name=测试
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# 带精确过滤(=)
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GET /api/example/page?pageNo=1&pageSize=10&status=1&type=2
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# 模糊 + 精确组合
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GET /api/example/page?pageNo=1&pageSize=10&name=测试&status=1
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# 自定义排序
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GET /api/example/page?pageNo=1&pageSize=10&orderField=sort&orderType=asc
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# 指定返回字段
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GET /api/example/page?pageNo=1&pageSize=10&fields=id,name,status
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# 多条件组合
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GET /api/user/page?pageNo=1&pageSize=20&username=admin&status=1&deptId=3&orderField=id&orderType=desc
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```
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## 返回结构
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```json
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{
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"code": 0,
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"ok": true,
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"msg": "操作成功",
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"data": {
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"records": [
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{ "id": 1, "name": "测试", "status": 1, "statusText": "启用", "createTime": "2026-01-01 00:00:00" },
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{ "id": 2, "name": "示例", "status": 0, "statusText": "禁用", "createTime": "2026-01-02 00:00:00" }
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],
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"total": 100,
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"size": 10,
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"current": 1,
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"pages": 10
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}
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}
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```
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### 返回字段
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| 字段 | 类型 | 说明 |
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|------|------|------|
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| `records` | array | 当前页数据列表 |
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| `total` | number | 总记录数 |
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| `size` | number | 每页条数 |
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| `current` | number | 当前页码 |
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| `pages` | number | 总页数(`ceil(total / size)`) |
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## 查询条件匹配
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### pageLikeFields — 模糊匹配(LIKE)
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在 Logic 中配置的字段,前端传参时自动使用 `LIKE '%值%'` 查询:
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```php
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class ExampleLogic extends BaseLogic
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{
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protected array $pageLikeFields = ['name', 'title'];
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}
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```
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```bash
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# name 字段自动使用 LIKE 查询
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GET /api/example/page?name=测试
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# 生成: WHERE name LIKE '%测试%'
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```
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### pageEqFields — 精确匹配(=)
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在 Logic 中配置的字段,前端传参时自动使用 `= 值` 查询:
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```php
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class ExampleLogic extends BaseLogic
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{
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protected array $pageEqFields = ['status', 'type', 'category_id'];
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}
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```
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```bash
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# status 和 type 字段自动使用 = 查询
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GET /api/example/page?status=1&type=2
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# 生成: WHERE status = 1 AND type = 2
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```
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### 条件组合
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```bash
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# 模糊 + 精确 + 排序 + 分页
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GET /api/example/page?pageNo=1&pageSize=20&name=测试&status=1&orderField=sort&orderType=asc
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# 生成 SQL:
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# SELECT * FROM think_example
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# WHERE is_delete = 0
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# AND name LIKE '%测试%'
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# AND status = 1
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# ORDER BY sort ASC
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# LIMIT 20 OFFSET 0
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```
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## 排序
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### 前端传参排序
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```bash
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# 按创建时间倒序
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GET /api/example/page?orderField=createTime&orderType=desc
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# 按排序字段正序
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GET /api/example/page?orderField=sort&orderType=asc
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```
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### Logic 默认排序
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```php
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class ExampleLogic extends BaseLogic
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{
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/**
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* 单字段排序
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*
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* @var array
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*/
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protected array $pageOrderBy = ['field' => 'sort', 'type' => 'asc'];
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/**
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* 多字段排序
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*
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* @var array
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*/
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protected array $pageOrderBy = [
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['field' => 'sort', 'type' => 'asc'],
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['field' => 'id', 'type' => 'desc'],
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];
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}
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```
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**优先级:** 前端传参 > Logic 默认配置
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## 字段过滤
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### fields 参数
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前端可通过 `fields` 参数指定只需要的字段,减少数据传输量:
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```bash
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# 只返回 id、name、status 三个字段
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GET /api/example/page?fields=id,name,status
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```
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**响应:**
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```json
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{
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"records": [
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{ "id": 1, "name": "测试", "status": 1 },
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{ "id": 2, "name": "示例", "status": 0 }
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]
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}
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```
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**注意:** `id` 字段始终保留,即使未在 `fields` 中指定。
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## 参数转换
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前端使用 camelCase,后端自动转换为 snake_case:
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| 前端参数 | 转换后 | 说明 |
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|---------|--------|------|
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| `pageNo` | `pageNo` | 不转换(排除项) |
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| `pageSize` | `pageSize` | 不转换(排除项) |
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| `orderField` | `orderField` | 不转换(排除项) |
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| `orderType` | `orderType` | 不转换(排除项) |
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| `fields` | `fields` | 不转换(排除项) |
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| `categoryId` | `category_id` | 自动转换 |
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| `createTime` | `create_time` | 自动转换 |
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| `userName` | `user_name` | 自动转换 |
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### 排序字段值也自动转换
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```bash
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# 前端传入 camelCase
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GET /api/example/page?orderField=createTime
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# 后端自动转换为 snake_case
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ORDER BY create_time DESC
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```
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## Controller 层实现
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### 使用 _index 快捷方法(推荐)
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```php
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class ExampleController extends BaseController
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{
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protected ExampleLogic $logic;
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protected function initialize(): void
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{
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$this->logic = new ExampleLogic();
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}
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#[Permission('sys:example:page', '案例分页')]
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public function page(): Json
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{
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return parent::_index($this->logic);
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}
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}
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```
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### 带额外查询条件
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```php
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#[Permission('sys:user:page', '用户分页')]
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public function page(): Json
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{
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// 额外条件:只查启用状态的用户
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return parent::_index($this->logic, ['status' => 1]);
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}
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```
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### 带关联查询
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```php
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#[Permission('sys:article:page', '文章分页')]
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public function page(): Json
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{
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// 预加载分类关联
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return parent::_index($this->logic, [], ['category']);
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}
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```
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## Logic 层实现
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```php
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class ExampleLogic extends BaseLogic
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{
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/**
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* 关联的模型类
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*
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* @var string
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*/
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protected string $modelClass = Example::class;
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/**
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* LIKE 模糊匹配字段
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*
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* @var array
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*/
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protected array $pageLikeFields = ['name', 'title'];
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/**
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* 精确匹配字段
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*
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* @var array
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*/
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protected array $pageEqFields = ['status', 'type', 'category_id'];
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/**
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* 默认排序规则
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*
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* @var array
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*/
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protected array $pageOrderBy = ['field' => 'sort', 'type' => 'asc'];
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/**
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* 枚举显示名映射
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*
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* @var array
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*/
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protected array $serializeMaps = ['status' => 'example_status'];
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}
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```
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## 前端集成
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### API 函数
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```typescript
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// src/api/tool/example.ts
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export function getExamplePage(params?) {
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return http.request({ url: '/example/page', method: 'GET', params });
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}
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```
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### 组件使用
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```vue
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<script setup>
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import { getExamplePage } from '@/api/tool/example';
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const tableData = ref([]);
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const pageNo = ref(1);
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const pageSize = ref(20);
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const total = ref(0);
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const searchForm = ref({ name: '', status: '' });
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const fetchData = async () => {
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const res = await getExamplePage({
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pageNo: pageNo.value,
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pageSize: pageSize.value,
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...searchForm.value,
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});
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tableData.value = res.records;
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total.value = res.total;
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};
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// 搜索
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const handleSearch = () => {
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pageNo.value = 1;
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fetchData();
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};
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// 翻页
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const handlePageChange = (page) => {
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pageNo.value = page;
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fetchData();
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};
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onMounted(() => fetchData());
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</script>
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```
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## 常见问题
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### 问题 1:搜索条件不生效
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**原因:** 字段名未在 `pageLikeFields` 或 `pageEqFields` 中配置。
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**解决:** 在 Logic 中添加对应字段配置。
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### 问题 2:排序不生效
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**原因:** `orderField` 传了数据库不存在的字段名。
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**解决:** 确保 `orderField` 传的是数据库字段名的 camelCase 形式。
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### 问题 3:分页数据重复
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**原因:** 排序字段值相同,导致数据库返回顺序不确定。
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**解决:** 排序字段加上唯一字段(如 id)作为第二排序条件。
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