发生数据库错误错误号：1048 列“名称”不能为空

Question

A PHP Error was encountered

Severity: Notice

Message: Undefined index: supp

Filename: models/Supplier_m.php

Line Number: 18

Backtrace:

File: C:\xampp\htdocs\sikan_v2\application\models\Supplier_m.php
Line: 18
Function: _error_handler

File: C:\xampp\htdocs\sikan_v2\application\controllers\Supplier.php
Line: 42
Function: add

File: C:\xampp\htdocs\sikan_v2\index.php
Line: 315
Function: require_once

A Database Error Occurred

Error Number: 1048

Column 'name' cannot be null

INSERT INTO `supplier` (`name`, `phone`, `address`, `description`) VALUES (NULL, '81213176824', 'xa', NULL)

Filename: C:/xampp/htdocs/sikan_v2/system/database/DB_driver.php

Line Number: 692

My Controllers: controllers/Supplier.php

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Supplier extends CI_Controller {

    
    function __construct()
    {
        parent::__construct();
        check_not_login();
        check_admin();
        $this->load->model('supplier_m');
    
    } 


    public function index()
    {
        $data['row'] = $this->supplier_m->get();
        $this->template->load('template', 'supplier/supplier_data', $data);
    }

    public function add()
     {
        $data['row'] = $this->supplier_m->get();
        $supplier = new stdClass();
        $supplier->supplier_id = null;
        $supplier->name = null;
        $supplier->phone = null;
        $supplier->address = null;
        $supplier->description = null;
        $data = array(
            'page' => 'add',
            'row' => $supplier
        );
        $this->template->load('template', 'supplier/supplier_form', $data);
    }

    public function process()
    {
        $post = $this->input->post(null, TRUE);
        if(isset($_POST['add'])) {
            $this->supplier_m->add($post);
        }

        if($this->db->affected_rows() > 0) {
            echo "<script>alert('Data berhasil disimpan');</script>";
        }
        echo "<script>window.location='".site_url('supplier')."';</script>";
    }

    public function del($id) {
        $this->supplier_m->del($id);
        if($this->db->affected_rows() > 0) {
            echo "<script>alert('Data berhasil dihapus');</script>";
        }
        echo "<script>window.location='".site_url('supplier')."';</script>";
    }
}

My View: views/supplier_form.php

<section class="content-header">
      <h1>Suppliers
        <small>Pemasok Barang</small>
      </h1>
      <ol class="breadcrumb">
        <li><a href="#"><i class="fa fa-dashboard"></i></a></li>
        <li><a href="#"></a></li>
        <li class="active">Suppliers</li>
      </ol>
    </section>

    <!-- Main content -->
    <section class="content">

    <div class="box">
        <div class="box-header">
            <h3 class="box-title">Add Supplier</h3>
            <div class="pull-right">
                <a href="<?=site_url('supplier')?>" class="btn btn-warning btn-flat">
                   <i class="fa fa-undo"></i> Back
                </a>
            </div>
         </div>
         <div class="box-body">
            <div class="row">
                <div class="col-md-4 col-md-offset-4">
                    <form action="<?=site_url('supplier/process')?>" method="post">
                        <div class="form-group">
                            <label>Supplier Name *</label>
                            <input type="text" name="supp" value="<?=$row->name?>" class="form-control" required>
                        </div>
                        <div class="form-group">
                            <label>Phone *</label>
                            <input type="number" name="phone" value="<?=$row->phone?>" class="form-control" required>
                        </div>
                        <div class="form-group">
                            <label>Address</label>
                            <textarea name="addr" class="form-control" required <?=$row->address?>></textarea>
                        </div>
                        <div class="form-group">
                            <label>Description</label>
                            <textarea name="desc" class="form-control" <?=$row->description?>></textarea>
                        </div>
                        <div class="form-group">
                            <button type="submit" name="<?=$page?>" class="btn btn-success btn-flat">
                               <i class="fa fa-paper-plane"></i> Save
                            </button>    
                            <button type="Reset" class="btn btn-flat">Reset</button>    
                        </div>
                
                    </form>

                </div>

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

    </section> 

My Models: models/Supplier_m.php

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Supplier_m extends CI_Model {

    public function get($id = null)
    {
        $this->db->from('supplier');
        if($id != null) {
            $this->db->where('supplier_id', $id);
        }
        $query = $this->db->get();
        return $query;
    } 

   public function add($post)
   {
    $params = [
        'name' => $post['supp'],
        'phone' => $post['phone'],
        'address' => $post['addr'],
        'description' => empty($post['desc']) ? null : $post['desc'],
    ];
    $this->db->insert('supplier', $params);

   }

    public function del($id)
    {
        $this->db->where('supplier_id', $id);
        $this->db->delete('supplier');
    }

}

please help me solve this error, I have tried but still can't

Answer 1

For first error

you have open your Supplier_m model and find function -> public function add($post)

and at the beginning of the function you have to check the data which you have send from controller like

public function add($post){
  echo "<pre>";print_r($post);die;
}

you will get the actual result of post data

For second error

Open your phpMyadmin (databse) edit the table and select the checkbox as NULL beside the name column, find the below image may be it will help you