在使用fastadmin的过程中，可能出现多选需要排序的问题
比如在类型选择的时候选择的是如下顺序

但是保存后，去修改页面发现排序变成如下

如果需要改成按照开始的排序修改
在controller中重写selectpage方法即可
代码如下

 /**     * Selectpage搜索     *     * @internal     */    public function selectpage()    {        //设置过滤方法        $this->request->filter(['strip_tags', 'htmlspecialchars']);        //搜索关键词,客户端输入以空格分开,这里接收为数组        $word = (array)$this->request->request("q_word/a");        //当前页        $page = $this->request->request("pageNumber");        //分页大小        $pagesize = $this->request->request("pageSize");        //搜索条件        $andor = $this->request->request("andOr", "and", "strtoupper");        //排序方式        $orderby = (array)$this->request->request("orderBy/a");        //显示的字段        $field = $this->request->request("showField");        //主键        $primarykey = $this->request->request("keyField");        //主键值        $primaryvalue = $this->request->request("keyValue");        //搜索字段        $searchfield = (array)$this->request->request("searchField/a");        //自定义搜索条件        $custom = (array)$this->request->request("custom/a");        //是否返回树形结构        $istree = $this->request->request("isTree", 0);        $ishtml = $this->request->request("isHtml", 0);        if ($istree) {            $word = [];            $pagesize = 99999;        }        if($primaryvalue==""||$primaryvalue==null){            $order = "field(`{$primarykey}`, 0)";        }        else{            $order = "field(`{$primarykey}`, {$primaryvalue})";        }        $field = $field ? $field : 'name';        //如果有primaryvalue,说明当前是初始化传值        if ($primaryvalue !== null) {            $where = [$primarykey => ['in', $primaryvalue]];        } else {            $where = function ($query) use ($word, $andor, $field, $searchfield, $custom) {                $logic = $andor == 'AND' ? '&' : '|';                $searchfield = is_array($searchfield) ? implode($logic, $searchfield) : $searchfield;                foreach ($word as $k => $v) {                    $query->where(str_replace(',', $logic, $searchfield), "like", "%{$v}%");                }                if ($custom && is_array($custom)) {                    foreach ($custom as $k => $v) {                        if (is_array($v) && 2 == count($v)) {                            $query->where($k, trim($v[0]), $v[1]);                        } else {                            $query->where($k, '=', $v);                        }                    }                }            };        }        $adminIds = $this->getDataLimitAdminIds();        if (is_array($adminIds)) {            $this->model->where($this->dataLimitField, 'in', $adminIds);        }        $list = [];        $total = $this->model->where($where)->count();        if ($total > 0) {            if (is_array($adminIds)) {                $this->model->where($this->dataLimitField, 'in', $adminIds);            }                $datalist = $this->model->where($where)                     ->orderRaw($order)                    ->page($page, $pagesize)                    ->field($this->selectpageFields)                    ->select();            foreach ($datalist as $index => $item) {                unset($item['password'], $item['salt']);                $list[] = [                    $primarykey => isset($item[$primarykey]) ? $item[$primarykey] : '',                    $field      => isset($item[$field]) ? $item[$field] : '',                    'pid'       => isset($item['pid']) ? $item['pid'] : 0                ];            }            if ($istree) {                $tree = Tree::instance();                $tree->init(collection($list)->toArray(), 'pid');                $list = $tree->getTreeList($tree->getTreeArray(0), $field);                if (!$ishtml) {                    foreach ($list as &$item) {                        $item = str_replace('&nbsp;', ' ', $item);                    }                    unset($item);                }            }        }        //这里一定要返回有list这个字段,total是可选的,如果total<=list的数量,则会隐藏分页按钮        return json(['list' => $list, 'total' => $total]);    }

另外如果需要在index页面展示数据
需要在Model中添加

  public function getTypenameAttr($value, $data){        $typenameArr = thinkDb::name("booktype")            ->where("id", "in", $data["booktype_ids"])            ->orderRaw('field(id,'.$data["booktype_ids"].')')            ->column("typename");        return implode(",", $typenameArr);    }

在controller中添加

 foreach ($list as $row) {                $row->typename = $row->typename;            }

在前台直接调用即可

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