如何使用代码点火器编辑记录

我正在尝试使用codeigniter编辑我的数据库记录，但我做不到，我不明白的问题是什么。请帮忙。

这是我的控制器代码：

    public function edit()
    {
        $this->form_validation->set_rules('name','Name','trim|required');
        $this->form_validation->set_rules('email','E-mail','trim|required');
        $this->form_validation->set_rules('phone','Phone','trim|required');
        if ($this->form_validation->run() == FALSE) {
            echo "error";
        }
        else{
            $id = $this->input->post('id');
            $this->crud_mdl->editCrud($id);
            echo "success";
        }
    }

这是我的模型代码：

    public function editCrud($id)
    {
        $update = array(
            'name' => $this->input->post('name'),
            'email' => $this->input->post('email'),
            'phone' => $this->input->post('phone')
            );
        $this->db->where('id',$id);
        return $this->db->update('test', $update);
    }

这是我的观点：

    <div>
    <?php echo form_open('crud/edit');?>
    <?php foreach ($records as $record) {?>
    <label> ID </label>
    <input type="text" name="id" id="id" disabled="disable" value = "<?php echo $record->id ;?>" /><br/>
    <label>Name</label>
    <input type="text" name="name" id ="name" value = "<?php echo $record->name ;?>" /><br/>
    <label>E-Mail</label>
    <input type="text" name="email" id ="email" value="<?php echo $record->email ;?>" /><br/>
    <label>Phone</label>
    <input type="text" name="phone" id ="phone" value = "<?php echo $record->phone ;?>" /><br/>
    <input type="submit" name="edit" value="Edit" />
    <?php }?>
    <?php echo form_close();?>
</div>