jquery - CodeIgniter 中调用成员函数错误

Question

我正在编写一个使用ajax删除表中特定记录的代码。但每次我尝试删除记录时，都会出现以下错误。

Fatal error: Call to a member function delete_specific_record() on a non-object in C:\xampp\htdocs\abcsystem\application\controllers\fuel_types.php on line 118

我几乎尝试了互联网上的所有解决方案，但仍然一无所获。我会添加相关的代码块以供引用。

在 JS 中，

//this function will run when fuel delete button is pressed
$("#fueltypes .delete").click(function(event)
{
    //prevent default action being triggered
    event.preventDefault();

    //store relevant data fields to variables
    var base_url    = $("#base_url").val();
    var fuelTypeId  = $(this).siblings("input[type=hidden]").val();

    //create the data streem
    datastreem = ({fuelTypeId:fuelTypeId});

    $.ajax({
        type:'POST',
        url:base_url+"index.php/fuel_types/ajax_delete_fuel_type",
        data:datastreem,
        success:function(response)
        {
            if(response==1)
            {
                alert("Fuel type deleted");
            }
            else
            {
                alert("Fuel type deletion failed");
            }
        }
    })

});

在 Controller (fuel_types.php)中，

class Fuel_types extends CI_Controller
{

    //this function will run when admin try to delete a fuel type
    public function ajax_delete_fuel_type()
    {
        //save ajax sent data into variables
        $fuelTypeId = $this->input->post("fuelTypeId");

        //load vehicle model
        $this->load->model("Vehicles_model");

        //create the recordId array
        $recordId = array('fuel_type_id' => $fuelTypeId);

        //call the function to check if record exists
        $results = $this->Vehicles_model->get_specific_record($recordId);

        //if records available 
        if(($results->num_rows)>0)
        {
            echo "0";
        }
        //if no record is available in the vehicle table
        else
        {                
            //load fuel type model
            $this->load->model("Fuel_types_model");

            //create the recordId array
            $recordId = array('fuel_type_id' => $fuelTypeId);

            //call function to delete records in the model
            $delResults = $this->Fuel_types_model->delete_specific_record($recordId);

            //if record deletion is successful
            if($delResults>0)
            {
                echo("1");
            }
            //if it fails
            else
            {
                echo("0");
            }
        }
    }
}

最后是模型(Fuel_types_model.php)，

class Fuel_types_model extends CI_Model
{
    function __construct()
    {
        parent::__construct();
    }

    //this function will delete record(s) depend on the recordId
    public function delete_specific_record($delRecordId)
    {
        $this->db->where($delRecordId);
        $this->db->delete("fuel_types");

        $delResults = $this->db->affected_rows();

        return $delResults;
    }

}

我真的很困惑，不知道自己做错了什么。仅供引用，我在 config/autoload.php 文件中自动加载了数据库。

我只包含了 Controller 和模型的相关功能。与该 Controller 和模型相关的其他功能(例如数据检索和更新功能)运行良好。唯一的问题是

   //call function to delete records in the model
   $delResults = $this->Fuel_types_model->delete_specific_record($recordId);

这一行。

<小时/>

(编辑)仅供引用，我在下面包含了完整的错误消息

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Fuel_types::$fuel_types_model

Filename: controllers/fuel_types.php

Line Number: 118

Fatal error: Call to a member function delete_specific_record() on a non-object in C:\xampp\htdocs\abcsystem\application\controllers\fuel_types.php on line 118

Answer 1

更改您的模型函数名称，将delete_specific_record更改为删除或其他名称或者在 Controller 中调用，它确实有效，我有同样的问题，但更改后解决了，不要在函数中使用删除关键字并尝试这个函数

public function remove($id)
 {

 $this->db->where('id',$id);// passing your column name,value
   $this->db->delete('fuel_types');
    $newdata = array(
      'msg'  => 'Deleted  Successfully');
       $session=$this->session->set_userdata($newdata);
       return true;
 }

试试这个，确实有效