It looks like you're close to getting the RTE working for your custom content element—let's go through the key adjustments needed to resolve this:

1. Simplify and Correct the showitem Syntax #

Your current showitem includes outdated references to richtext and rte_enabled controls. In TYPO3 8.7, these are handled via columnsOverrides, so you can clean up the showitem to just include the bodytext field directly:

$GLOBALS['TCA']['tt_content']['types']['myCustomElement']['showitem'] = '--palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xml:palette.general;general,header,subheader,header_link,bodytext,image,--div--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xml:tabs.appearance,--palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xml:palette.frames;frames,--div--;LLL:EXT:cms/locallang_ttc.xlf:tabs.access,--palette--;LLL:EXT:cms/locallang_ttc.xlf:palette.visibility;visibility,--palette--;LLL:EXT:cms/locallang_ttc.xlf:palette.access;access,--div--;LLL:EXT:lang/locallang_tca.xlf:sys_category.tabs.category,categories,tx_gridelements_container,tx_gridelements_columns';

2. Add the Critical enableRichtext Flag to columnsOverrides #

Your existing columnsOverrides sets defaultExtras, but you're missing the enableRichtext flag in the field's config—this tells TYPO3 to activate the RTE for the bodytext field in your custom element. Update it to:

$GLOBALS['TCA']['tt_content']['types']['myCustomElement']['columnsOverrides']['bodytext'] = [
    'defaultExtras' => 'richtext[*]:rte_transform[mode=ts_css]',
    'config' => [
        'enableRichtext' => true,
    ],
];

3. Verify Page TSconfig Settings #

Ensure the RTE is allowed for your custom content element by adding this to your Page TSconfig:

RTE.config.tt_content.bodytext.types.myCustomElement = <default>

This inherits the default RTE configuration for the bodytext field when using your custom CE. If you need a custom RTE setup, replace <default> with your specific configuration name.

4. Clear All TYPO3 Caches #

Don't skip this step! After making TCA or TSconfig changes, clear all TYPO3 caches (including TCA and configuration caches) to ensure the new settings are applied.

5. Inspect Merged TCA (If Issues Persist) #

If the RTE still doesn't show up, use the Configuration module in the TYPO3 backend to check the merged TCA for tt_content and your custom element. This will confirm if your settings are being overridden by another extension or default configuration.

Let me know if any of these steps get your RTE working!

内容的提问来源于stack exchange，提问作者ǝlpoodooɟƃuooʞ