codeigniter 为 foreach() 提供的参数无效

Question

我有一个完整的工作代码，可以检索插入更新和删除数据到数据库。

一切正常，但如果我删除一些数据，它会被删除，但当再次直接到我的查看页面时，它将返回“为 foreach() 提供的参数无效”。

当我再次点击我的查看页面链接时一切正常，我删除的数据也消失了，这只是删除功能发生的。

代码：

控制器：

public function merk(){
        //$data["result"] = $this->modelAdminMerk->getMerk();
        $data["totalRows"] = $this->modelAdminMerk->getTotalRows();

        $config["base_url"] = base_url() . "admin/merk";
        $config["per_page"] = 15;
        $config["total_rows"] = $data["totalRows"];
        $config["uri_segment"] = 3;
        $config["num_links"] = 10;

        $this->pagination->initialize($config);

        if( ! $this->uri->segment(3)){
            $page = 0;
        }else{
            $page = $this->uri->segment(3);
        }

        $data["results"] = $this->modelAdminMerk->getMerkByPages($config["per_page"], $page);
        $data["links"] = $this->pagination->create_links();

        $this->load->view("adminView/adminHeader");
        $this->load->view("adminView/adminMerk", $data);
        $this->load->view("adminView/adminFooter");
    }

    public function insertMerk(){
        $this->load->view("adminView/adminHeader");
        $this->load->view("adminView/adminInsertMerk");
        $this->load->view("adminView/adminFooter");
    }

    public function validateInsertMerk(){
        $this->form_validation->set_rules("namaMerk", "Nama Merk", "trim|required|min_length[3]|max_length[30]");

        if($this->form_validation->run()){

            $newMerk = array("merk" => $this->input->post("namaMerk"));
            $this->modelAdminMerk->insertMerk($newMerk);
            $this->merk();
        }else{
            echo "GAGAL!!!";
        }
    }

    public function editMerk($id){
        $data["merk"] = $this->modelAdminMerk->getMerkById($id);

        $this->load->view("adminView/adminHeader");
        $this->load->view("adminView/adminEditMerk", $data);
        $this->load->view("adminView/adminFooter");
    }

    function validateEditMerk(){
        $this->form_validation->set_rules("namaMerk", "Nama Merk", "trim|required|min_length[3]|max_length[30]");

        if($this->form_validation->run()){

            $newMerk = array("merk" => $this->input->post("namaMerk"));
            $this->modelAdminMerk->editMerk($this->input->post("id"), $newMerk);
            $this->merk();
        }else{
            echo "GAGAL";
        }

    }

    public function deleteMerk($id){
        $this->modelAdminMerk->deleteMerk($id);
        $this->merk();
    }

型号：

function getMerk(){
        $data = $this->db->query("SELECT * FROM merkbarang");
        return $data->result();
    }

    function getMerkById($id){
        $this->db->where("id", $id);
        $data = $this->db->get("merkbarang");
        return $data->row();
    }

    function insertMerk($newMerk){
        $this->db->insert("merkbarang", $newMerk);
        return true;
    }

    function editMerk($id, $newMerk){
        $this->db->where("id", $id);
        $this->db->update("merkbarang", $newMerk);
        return true;
    }

    function deleteMerk($id){
        $this->db->where("id", $id);
        $this->db->delete("merkbarang");
        return true;
    }

    function getTotalRows(){
        $rows = $this->db->count_all("merkbarang");

        return $rows;
    }

    function getMerkByPages($limit, $start){
        $this->db->limit($limit, $start);
        $query = $this->db->get("merkbarang");

        if($query->num_rows() > 0){
            foreach ($query->result() as $row){
                $data[] = $row;
            }
            return $data;
        }else{
            return false;
        }
    }

查看：

<div class="container">
    <div class="row">
        <div class="col-md-3">
            <div class="panel panel-danger">
                <div class="panel-body">
                    <ul class="nav nav-pills nav-stacked">
                        <li role="presentation" class="active"><a href="<?php echo base_url(); ?>admin/insertMerk">Insert Merk</a></li>
                    </ul>
                </div>
            </div>
        </div>

        <div class="col-md-9">
            <div class="panel panel-default">
                <div class="panel-heading">
                    <strong>Merk</strong>
                </div>
                <div class="panel-body">
                    <div class="row" id="tabelBarang">
                        <div class="col-md-1 colBarang">
                            <strong>No</strong>
                        </div>
                        <div class="col-md-7 colBarang">
                            <strong>Merk</strong>
                        </div>
                        <div class="col-md-4 colBarang">
                            <strong>Action</strong>
                        </div>
                    </div>

                    <?php 
                        $angka = 0;
                        foreach ($results as $row){
                            $id = $row->id;
                            $merk = $row->merk;
                    ?>


                    <div class="row" id="tabelBarang">
                        <div class="col-md-1 colBarang">
                            <?php echo ++$angka; ?>
                        </div>
                        <div class="col-md-7 colBarang">
                            <?php echo $merk; ?>
                        </div>
                        <div class="col-md-2 colBarang">
                            <button type="button" class="btn btn-info btn-xs" aria-label="Left Align">
                                <a href="<?php echo base_url(); ?>admin/editMerk/<?php echo $id; ?>">Edit</a>                         
                            </button>
                        </div>
                        <div class="col-md-2 colBarang">
                            <button type="button" class="btn btn-danger btn-xs" aria-label="Left Align">
                                <a href="<?php echo base_url(); ?>admin/deleteMerk/<?php echo $id; ?>">Delete</a>                         
                            </button>
                        </div>
                    </div>

                    <?php 
                        }
                    ?>
                    <?php echo $links; ?>
                </div>


            </div>
        </div>
    </div>
</div>

Answer 1

在我看来，您的代码没有任何问题，这绝对可以，但我建议您在 delete 函数中尝试 CI 的 redirect() 方法

public function deleteMerk($id){
        $this->modelAdminMerk->deleteMerk($id);
        redirect('controllername/merk');
   }