TYPO3 TCA显示条件(displayCond) with mysql to MM table

Question

我有一个带有主要 table 的扩展，带有一个复选框，如果该项目已经通过 MM table 建立关系，则该复选框不可用，相关 TCA :

'checkbox' => [
  'displayCond' =>'FIELD:uid:!IN:SELECT uid_foreign FROM tx_myext_object_object_mm',
  'exclude' => 0,
  'label' => 'checkbox',
  'config' => [
    'type' => 'check',
    'items' => [
      '1' => [
        '0' => 'LLL:EXT:lang/locallang_core.xlf:labels.enabled'
      ]
    ],
  'default' => 0
  ]
],

可以更正此语法还是不可能（此代码段不起作用）

Answer 1

由于 TYPO3 7.6 userFunc 可用作显示条件。

对于你的情况，我建议你的 TCA 配置：

'checkbox' => [
    'displayCond' =>'USER:VendorName\Myext\DisplayConditionMatcher->displayIfTxMyextObjectHasNoMMRelation',
    'exclude' => 1,
    'label' => 'Checkbox',
    'config' => [
        'type' => 'check',
        'default' => 0
    ]
],

还有一个名为 DisplayConditionMatcher.php 的 PHP class 位于您的分机 EXT:myext/Classes/ 中，内容如下：

<?php
namespace VendorName\Myext;

/**
 * Class DisplayConditionMatcher
 *
 * @package TYPO3
 * @subpackage tx_myext
 * @author 2016 J.Kummer <typo3 et enobe dot de>
 * @copyright Copyright belongs to the respective authors
 * @license http://www.gnu.org/licenses/gpl.html GNU General Public License, version 3 or later
 */

class DisplayConditionMatcher {

    /**
     * Checks for already existing mm relation of tx_myext_object
     * Returns true, if no mm relation found
     * 
     * @param array $configuration
     * @param \TYPO3\CMS\Backend\Form\FormDataProvider\EvaluateDisplayConditions $evaluateDisplayConditions
     * @return bool
     */
    public function displayIfTxMyextObjectHasNoMMRelation(array $configuration, $evaluateDisplayConditions = null)
    {
        $result = true;
        if (isset($configuration['record']['uid'])) {
            $countRows = $GLOBALS['TYPO3_DB']->exec_SELECTcountRows(
                'uid_foreign',
                'tx_myext_object_object_mm',
                'uid_foreign = ' . intval($configuration['record']['uid'])
            );
            if ($countRows > 0) {
                $result = false;
            }
        }
        if (isset($configuration['conditionParameters'][0]) && $configuration['conditionParameters'][0] === 'negate') {
            $result = !$result;
        }
        return $result;
    }
}

您可以为 userFunc 类型的 displayCondition 传递以冒号分隔的附加参数，如 TYPO3 CMS TCA 参考中所述。例如否定，已经在 PHP class:

中实现

'displayCond' =>'USER:VendorName\Myext\DisplayConditionMatcher->displayIfTxMyextObjectHasNoMMRelation:negate',

根据您的需要调整扩展名、路径和供应商的名称。

TYPO3 TCA显示条件(displayCond) with mysql to MM table

TYPO3 TCA display condition (displayCond) with mysql to MM table

mysql

typo3

extbase

typo3-7.6.x