Question

当我在Grails中使用RestfulController来保存对象的数据时，如何阻止客户端将更改应用于相关的子对象？

给出以下域类：

class Language {
    String name
}

class TranslationText {
    Language language
    String text
}

以下是TranslationText的POST数据：

{
    "language": { "id": 1, "name": "InvalidName" },
    "text": "Some Text"
}

在这里，我想引用现有的语言资源（ID = 1），但我不希望客户更改名称。

如何使用文本和语言（基于ID）保存此资源，但丢弃无效的语言名称属性？

我想以尽可能最小的方式修改RestfulController，尽可能地保留默认行为。

Answer 1

我认为你需要配置'cascade'映射属性。这将告诉GORM驱逐链接实例，因此它不会在Hibernate会话中，更改为新名称并刷新到DB：

<html>
<link rel = "stylesheet" href = "styling.css?version=3"></link>
    <body>

    <div id='acctdetails' style='padding-left: 15% '>
            <?php
            echo "USERNAME: ". $_SESSION["dynau"]; 
            ?>

                OR Date: <input type='text' placeholder='OR Date' name='ordate' value='<?php echo date('M, d, Y');?>'>

                OR ID: <input type='text' placeholder='OR ID' name='orid'>

                Payor : <input type='text' placeholder='Payor' name='payor' >
    </div>


    <center>
        <form method="POST">
            <?php       
    $result = mysqli_query($link,"SELECT * FROM account_db");

    echo"<html>";
    echo "<script>";
    echo "function calculate(amount, id){ 
          document.getElementById('total' + id).innerHTML = parseInt(document.getElementById('copy' + id).value) * amount; 
             var x=parseInt(document.getElementById('total' + id).innerHTML);
                var y = document.getElementById('sumtotal').innerHTML;
                var a = y.split(' ');
                var z = parseInt(a[1]) + parseInt(x);
                document.getElementById('sumtotal').innerHTML = 'Total: ' + z;

            }";
    echo "</script>";
    echo"<center>";
    echo "<form method='POST'>";
    echo "<br></br>";
    echo "<table style='border:1px solid black' id='thetable' name='pleasework'>";
    echo"<th>FILES</th>";
    echo"<th>AMOUNT</th>";
    echo"<th>NO. OF COPIES</th>";
    echo"<th>TOTAL AMOUNT</th>";

    $counter = 0;
    while($row = mysqli_fetch_row($result))
    {
        echo"<tr>";
        echo "<td >$row[1] </td>";
        echo "<td align=center>$row[2] </td>";
        echo "<td align=center>
                <input type='number' id='copy" . $counter . "' onkeyup='calculate(" . $row[2] .  ", " . $counter . ")'> 
                </td>";
            echo "<td align=center id='total" . $counter . "'></td>";
        echo"</tr>";
        $counter++;
        }   


    echo"<tr>
            <td  id='sumtotal'>TOTAL: 0</td>
        </tr>";


    echo "</table>";
    echo " <br><div style='padding-left: 15px'><input type='submit' id='btn1' value='Transact' name='transaction' onclick='javascript: window.print()'></div>";
    echo"</center>";
    echo"</html>";      
?>      
    </center>
    </body>
</html>

参考：http://docs.grails.org/3.1.x/ref/Database%20Mapping/cascade.html

如何防止更新子属性？

1 个答案: