Laravel9.x 对取出指定条数的数据进行分页
hi，我是温新，一名PHPer
保持着探索，向前方走去。
1.需求
不使用Laravel的paginate进行分页。取出指定条数的数据并对其进行分页。如用户表取出指定的1000条数据，并对这1000条数据进行分页。
2.指定条数的数据进行分页错误案例
1）对于分页，一般是如下操作：
<span style="color: rgb(255, 192, 0);">$users = User::paginate(1000);</span><br></br>
需要明白的是，这样的写法是对总数据进行分页，并不是对这取出的1000条数据进行分页。
2）对指定条数的数据进行分页的错误写法
<span style="color: rgb(255, 192, 0);">$users = User::limit(1000)->paginate(10);</span><br></br>
这个错误的案例想表达的是，limit取出1000条数据，然后使用paginate对这1000数据分为10页。Laravel并没有提供这种方法，因此，这种写法是错误的。
解决方法：使用Laravel提供的自定义分页类进行对指定数据进行分页。
3.array_slice()数组方式-代码实现
1）准备路由
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important"><?</span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// web.php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Route</span>::<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">get</span>(<span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'users'</span>, [<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">\App\Http\Controllers\DemoController</span>::<span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">class</span>, <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'index'</span>]);</span>
2）创建控制器并定义方法
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important"><?</span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> </span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">namespace</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">App\Http\Controllers</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">App\Models\User</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Illuminate\Http\Request</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Illuminate\Pagination\LengthAwarePaginator</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">class</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">DemoController</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">extends</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Controller</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">{</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">public</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">function</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">index</span>(<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Request</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span>)</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> {</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// 获取1000条数据</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">User</span>::<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">limit</span>(<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1000</span>)<span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">get</span>()<span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">toArray</span>();</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// 页码</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$page</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">page</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">??</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">//每页的条数</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">100</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">//计算每页分页的初始位置</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$offset</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> (<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$page</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">*</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>) <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// 使用自定义分页类实现对指定数据分页</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">new</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">LengthAwarePaginator</span>(<span style="box-sizing: border-box;color: rgb(232, 191, 106) !important">array_slice</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span>, <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$offset</span>, <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>, <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">true</span>), <span style="box-sizing: border-box;color: rgb(232, 191, 106) !important">count</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span>), <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>,<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$page</span>, [<span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'path'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">url</span>(), <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'query'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">query</span>()]);</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">return</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> }</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">}</span>
3）路由访问并查看结果
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">{</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"current_page"</span>: <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"data"</span>: [</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> {</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"id"</span>: <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"name"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"Dr. Torrey Auer Jr."</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"email"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"romaine61@example.com"</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"email_verified_at"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"2022-03-04T14:35:27.000000Z"</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"created_at"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"2022-03-04T14:35:27.000000Z"</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"updated_at"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"2022-03-04T14:35:27.000000Z"</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> }</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> ],</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"next_page_url"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"http://la9api.test/uesrs?page=2"</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"path"</span>: <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">"http://la9api.test/uesrs"</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"per_page"</span>: <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">100</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"prev_page_url"</span>: <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">null</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"to"</span>: <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">100</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span class="cm-string cm-property" style="box-sizing: border-box;color: rgb(97, 175, 239) !important">"total"</span>: <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1000</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">}</span>
通过结果可以看到：
total：1000有1000条数据;
per_page：100每页显示100条数据；
4）使用API 资源返回数据
创建资源
<span style="color: rgb(255, 192, 0);">php artisan make:resource UserResource</span><br></br>
修改资源类
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important"><?</span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">namespace</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">App\Http\Resources</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Illuminate\Http\Resources\Json\JsonResource</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">class</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">UserResource</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">extends</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">JsonResource</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">{</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">public</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">function</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">toArray</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span>)</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> {</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">return</span> [</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'id'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$this</span>[<span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'id'</span>],</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'name'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$this</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">resource</span>[<span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'name'</span>]</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> ];</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> }</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">}</span>
修改控制器
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important"><?</span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">namespace</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">App\Http\Controllers</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">App\Http\Resources\UserResource</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">class</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">DemoController</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">extends</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Controller</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">{</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">public</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">function</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">index</span>(<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Request</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span>)</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> {</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// 省略了上面的代码</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">return</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">UserResource</span>::<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">collection</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span>);</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> }</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">}</span>
这种方式有个缺点，就是数据集合需要转成数组，如果是数组形式进行分页，配合资源使用时，并不好用。
4.集合方法slice()对象方式-代码实现
基于上面的案例来改动实现。
1）修改控制器方法
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important"><?</span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">namespace</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">App\Http\Controllers</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">App\Http\Resources\UserResource</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">App\Models\User</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Illuminate\Http\Request</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Illuminate\Pagination\LengthAwarePaginator</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">class</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">DemoController</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">extends</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Controller</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">{</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">public</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">function</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">index</span>(<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Request</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span>)</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> {</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// users数据集合对象</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">User</span>::<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">limit</span>(<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1000</span>)<span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">get</span>();</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// 页码</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$page</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">page</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">??</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">1</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">//每页的条数</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">100</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">//计算每页分页的初始位置</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$offset</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span> (<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$page</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">*</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>) <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(98, 151, 85) !important">// slice方法对对象进行分页</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=</span><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">new</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">LengthAwarePaginator</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">slice</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$offset</span>, <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>), <span style="box-sizing: border-box;color: rgb(232, 191, 106) !important">count</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span>), <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$perPage</span>,<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$page</span>, [<span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'path'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">url</span>(), <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'query'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">query</span>()]);</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">return</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">UserResource</span>::<span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">collection</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$users</span>);</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> }</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">}</span>
2）修改资源类
<span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important"><?</span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">php</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">namespace</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">App\Http\Resources</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">use</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">Illuminate\Http\Resources\Json\JsonResource</span>;</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box"></span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"><span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">class</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">UserResource</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">extends</span> <span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">JsonResource</span></span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">{</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">public</span> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">function</span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">toArray</span>(<span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$request</span>)</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> {</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(198, 120, 221) !important">return</span> [</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'id'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$this</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">id</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> <span style="box-sizing: border-box;color: rgb(152, 195, 121) !important">'name'</span> <span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">=></span> <span style="box-sizing: border-box;color: rgb(224, 108, 117) !important">$this</span><span style="box-sizing: border-box;color: rgb(86, 182, 194) !important">-></span><span style="box-sizing: border-box;color: rgb(209, 154, 102) !important">name</span>,</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> ];</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px"> }</span><br></br><span style="box-sizing: border-box;color: rgb(171, 178, 191);padding-right: 0.1px">}</span>
这样完成了数据集合对象的自定义分页。
3）使用场景：对数据集合对象进行自定义分页
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