[Typo3-dev] extension TCA question

[Rupert Germann]

hi zach,

Zach Davis wrote:
> One of my clients want an extension in which the records would be
> organized by category and sub-category. For example, a category might be
> "landscapes" and it might have the sub-categories "mountains" and
> "plains." The idea is that when the user created a record in the
> backend, she could select the category from one drop-down menu and then
> select the sub-category from another drop-down. Can anyont think of a
> way (using TCA, flexforms, whatever) to make the contents of the
> sub-category dropdown menu change based on what's been selected in the
> category dropdown? (in the example, we would only want the
> sub-categories of the "landscape" category to show up.)

that should be possible with the "type" field 
see: 
http://typo3.org/documentation/document-library/doc_core_api/ctrl_section/
and
http://typo3.org/documentation/document-library/doc_core_api/types_key_secti/

greets
rupi