關鍵'categoryname_UNIQUE'的重複條目'食物'

-1

我每次嘗試插入/添加具有相同名稱的類別名時都會收到此錯誤，即使我沒有在我的代碼中添加任何驗證。以下是我的代碼如下。我需要刪除這個錯誤，而是把我自己的驗證'不允許相同的數據'。關鍵'categoryname_UNIQUE'的重複條目'食物'

<!DOCTYPE html> 
<html lang="en"> 
<head> 
    <meta charset="utf-8"> 
    <meta http-equiv="X-UA-Compatible" content="IE=edge"> 
    <meta name="viewport" content="width=device-width, initial-scale=1"> 
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags --> 
    <title>Survey Settings</title> 

    <!-- Bootstrap --> 
    <link href="css/bootstrap.min.css" rel="stylesheet"> 
    <link href=" //maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> 
    <link href="https://cdn.datatables.net/1.10.13/css/dataTables.bootstrap.min.css" rel="stylesheet"> 



    </head> 
<body> 

    <br/> 
    <hr/> 
    <?php 
    require_once("/dao/CategoryDAO.php"); 
    require_once("/dao/TopicDAO.php"); 

    $category = new CategoryDAO(); 
    $topic = new TopicDAO(); 
    $allCategories_arr = $category->getAllCategories(); 
    $allTopics_arr = $topic->getAllTopicTitles(); 

    ?> 
    <div class="container"> 
     <div class="row"> 
      <form method="POST"> 
       <?php 
       if(isset($_POST['submit'])){ 
        include 'testdb.php'; 

        $addcategory = $_POST['categoryname']; 

        $query = mysqli_query($con, "SELECT categoryname FROM category WHERE categoryname = '.$addcategory.'"); 

         $insert = mysqli_query($con, "INSERT INTO category (`categoryname`) VALUES ('$addcategory')"); 
         if(!$insert){ 
          echo mysqli_error($con); 
         } 
         else{ 
          header("Location:Settings.php"); 
          echo 'Category successfully added!'; 
         } 

       } 
       ?> 
      <table id="example" class="table table-striped table-bordered" cellspacing="0" width="100%"> 
       <thead> 
       <tr> 
        <th>Category ID</th> 
        <th>Category Name</th> 
        <th>Action</th> 
       </tr> 
       </thead> 
       <tbody> 
       <?php 
       foreach($allCategories_arr as $ar) { 

        echo "<tr>"; 
        echo "<th>" . $ar['category_id'] . "</th>"; 
        echo "<th>" . $ar['categoryname'] . "</th>"; 
        echo "<th><a class='btn btn-default' href='viewsubcategory.php?catid=" . $ar['category_id'] . "' >More Info</a><a class='btn btn-info' href='EditCategory.php?category_id=".$ar['category_id']."'>Edit</a></th>"; 
        echo "</tr>"; 
       } 
       ?> 
       </tbody> 
      </table> 
       <div class="col-sm-2"> 
        <input type="text" name="categoryname" class="form-control input-sm" required /> 
       </div> 

       <input type="submit" name="submit" value="Add Category" class="btn btn-danger" /> 
     </div> 
    </div> 

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) --> 
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script> 
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    <script src="js/bootstrap.min.js"></script> 
    <script src="//code.jquery.com/jquery-1.12.4.js"></script> 
    <script src="https://cdn.datatables.net/1.10.13/js/jquery.dataTables.min.js"></script> 
    <script src="https://cdn.datatables.net/1.10.13/js/dataTables.bootstrap.min.js"></script> 
    <script type="text/javascript"> 
     $(document).ready(function() { 
      $('#example').DataTable(); 
     }); 
    </script> 


</body> 
    </html>

來源

2017-01-20 ranger

你申請了'categoryname'列'主要key'？ –

你必須從數據庫中刪除的唯一鍵設定爲categoryname場

來源

2017-01-20 10:31:52 mith

關鍵'categoryname_UNIQUE'的重複條目'食物'

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