TYPO3将后端内容保存在另一个数据库中

Question

I want to store content from my Backend in another database.

So let's say i have this in my Backend:

How can i save the value (eg the float value in the picture) in another database?

The reason why i need this, is, because i have another database, which is being used for some dynamic content loaded onto my Website with PHP.

Hopefully, someone has an idea and can help me :)

Answer 1

我将使用一个挂钩来更新外部数据库，该挂钩使用如果TYPO3后端中发生的更改触发的值来更新外部数据库，或者我使用一个由CLI触发并运行所有x分钟并更改其中值的调度程序任务/命令控制器。数据库。

Answer 2

There are several ways to achieve that. I just assume that you want to create relations between the tt_content table of TYPO3 and some external table in a different database or even different storage engine (web-service, file-system, ...).

In that case you could extend the TCA of the tt_content table by an additional property, let's call it external_reference . The backend form then should provide an additional selector field that allows to chose entities of the external data-source.

The following example assumes that your extension key is called my_extension , this has to be adjusted of course to the actual naming.

You can do so by putting the following configuration to your extension in the folder typo3conf/ext/my_extension/Configuration/TCA/Overrides/tt_content.php :

<?php
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns(
    'tt_content',
    [
        'external_reference' => [
            'exclude' => 1,
            'label' => 'External Source',
            'config' => [
                'type' => 'select',
                'items' => [
                    ['-- none --', 0]
                ],
                'itemsProcFunc' => ExternalReferenceSelection::class . '->render',
                'default' => 0,
            ]
        ],
    ]
);
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes(
    'tt_content',
    'external_reference'
);

Then you have to implement the selector and the retrieval from the external source, like eg

<?php
class ExternalReferenceSelection
{
    public function render(array $parameters)
    {
        $references = ExternalReferenceRepository::instance()->findAll();
        foreach ($references as $reference) {
            $parameters['items'][] = [
                $reference->getTitle(),
                $reference->getIdentifier()
            ];
        }
    }
}

To be able to persist the selected reference, you have to extend the SQL schema of tt_content as well in typo3conf/ext/my_extension/ext_tables.sql

#
# Table structure for table 'tt_content'
#
CREATE TABLE tt_content (

    external_reference int(11) unsigned DEFAULT '0' NOT NULL

);

The database schema is updated by invoking the database analyzer in the TYPO3 Install Tool, or by (re-)installing the extension in the Extension Manager.