Codeigniter |：將映像插入mysql時出錯

Question

每當我將圖像插入數據庫時​​，都會出現此錯誤

錯誤號：1452

不能添加或更新子行，外鍵約束失敗（ herbalcebu 。 product ，約束product_ibfk_1外鍵（ categorie_id ）參考categorie （ categorie_id ））

插入product （ product_image ）值（'q3.jpg'）

文件名：C：/xampp/htdocs/HerbalCebu/system/database/DB_driver.php

行號：691

這是我的控制器代碼

public function insert_product()
{
        $this->form_validation->set_rules('product_name','Productname','required');
        $this->form_validation->set_rules('product_price','Amount','required');
        $this->form_validation->set_rules('product_stock','Stock','required');
        $this->form_validation->set_rules('categorie_id','categorie_id','required');
        $this->form_validation->set_rules('product_description','Description','required');
     $config = array
        (
            'upload_path' => './assets/img',
            'allowed_types' => 'jpg|png|jpeg|bmp',
            'max_size'=> 0,
            'filename' => $_FILES['product_image']['name']
    );
    $this->load->library('upload',$config);
    if($this->upload->do_upload('product_image'))
    {
        $uploaddata  = $this->upload->data();
        $product_image=$uploaddata['file_name'];
        $this->db->insert('product',array('product_image'=>$this->upload->file_name));
    }
    if ($this->form_validation->run()) 
    {
        $data = $this->input->post();
        unset($data['submit']);
        $this->load->model('queries_product');  
        if($this->queries_product->insert_product($data))
        {
            $this->session->set_flashdata('msg','Successfully Inserted');
        }
        else
        {
            $this->session->set_flashdata('msg','Failed to Insert');
        }
        return redirect('inventory');
    }
    else
    {
        echo validation_errors ();
    }
}

我的模型代碼

public function insert_product($data)
    {   
        return $this->db->insert('product',$data);

    }

Answer 1

如果上傳了圖片，您的代碼將進行圖片插入，如果表單經過驗證，則將進行整個數據插入。

您的產品表具有categorie_id字段約束，不能為空，並且應存在於categorie表上，因此出現了以上錯誤。

您應該通過添加條件（如果已上傳）添加有條件的圖片數據，將product_image數據與整個產品數據合並：

public function insert_product()
{
        $this->form_validation->set_rules('product_name','Productname','required');
        $this->form_validation->set_rules('product_price','Amount','required');
        $this->form_validation->set_rules('product_stock','Stock','required');
        $this->form_validation->set_rules('categorie_id','categorie_id','required');
        $this->form_validation->set_rules('product_description','Description','required');

        if ($this->form_validation->run()) 
        {
               $data = $this->input->post();
               $config = array
                (
                'upload_path' => './assets/img',
                'allowed_types' => 'jpg|png|jpeg|bmp',
                'max_size'=> 0,
                'filename' => $_FILES['product_image']['name']
                 );
                $this->load->library('upload',$config);
                if($this->upload->do_upload('product_image'))
                {
                    $uploaddata  = $this->upload->data();
                    $product_image=$uploaddata['file_name'];
                    $data['product_image'] = $product_image;
                 } 
                unset($data['submit']);
                $this->load->model('queries_product');  
                if($this->queries_product->insert_product($data))
                {
                    $this->session->set_flashdata('msg','Successfully Inserted');
                }
                else
                {
                    $this->session->set_flashdata('msg','Failed to Insert');
                 }
                 return redirect('inventory');
         }
        else
        {
                echo validation_errors ();
         }
}

Answer 2

您的categoryID與類別不匹配