分页的每页数量可以通过配置全局定义

convention.php

@@ -209,8 +209,9 @@ return [
     ],
     //分页配置
     'paginate'               => [
-        'type'     => 'bootstrap',
-        'var_page' => 'page',
+        'type'      => 'bootstrap',
+        'var_page'  => 'page',
+        'list_rows' => 15
     ],
 
 ];

library/think/db/Query.php

@@ -744,7 +744,7 @@ class Query
 
     /**
      * 分页查询
-     * @param int $listRows 每页数量
+     * @param int|null $listRows 每页数量
      * @param bool $simple 简洁模式
      * @param array $config 配置参数
      *                      page:当前页,
@@ -752,15 +752,18 @@ class Query
      *                      query:url额外参数,
      *                      fragment:url锚点,
      *                      var_page:分页变量,
+     *                      list_rows:每页数量
      *                      type:分页类名,
      *                      namespace:分页类命名空间
      * @return \think\paginator\Collection
      * @throws DbException
      */
-    public function paginate($listRows = 15, $simple = false, $config = [])
+    public function paginate($listRows = null, $simple = false, $config = [])
     {
         $config = array_merge(Config::get('paginate'), $config);
 
+        $listRows = $listRows ?: $config['list_rows'];
+
         $class = (!empty($config['namespace']) ? $config['namespace'] : '\\think\\paginator\\driver\\') . ucwords($config['type']);
 
         $page = isset($config['page']) ? (int) $config['page'] : call_user_func([