[TYPO3-dev] Extbase relation to tt_content - TCA overwritten

[Dirk Wenzel]

Hi,
I'm building an extension where a model should have an m:n relation to 
tt_content records.

When setting up this relation in extension builder the TCA for 
tt_content is overwritten. Content elements can not be edited in BE 
anymore since the edit window is empty. Also the wizard for creating 
content elements doesn't show the icon for tt_content anymore. Instead 
there is the standard icon for extbase entities without a label.


I followed the instructions under [1]. The above case is mentioned 
there. But I don't understand how to avoid it. (see below for details)

Thanks in advance
Dirk

Model:

			==========
			Option
			Object Type: entity
			Is Aggregat Root: yes
			Enable Sorting: yes
			==========
			Properties
			[...]
			==========
			Relations
=========		Name: ContentElements
TtContent---------------Type: m:n
Object Type: entity	==========
Is Aggregat Root: yes
Enable Sorting: yes
=========
Properties
-Points
=========

Generated ext_typoscript_setup.txt:
config.tx_extbase{
     persistence{
         classes{

             webfox\T3rating\Domain\Model\TtContent {
                 mapping {
                     tableName = tt_content
                     recordType = Tx_T3rating_TtContent
                 }
             }

         }
     }
}

Generated [...]TCA/TtContent.php: empty

[1] 
http://wiki.typo3.org/T3Doc/Extension_Builder/Mapping_to_tables_and_extending_classes