[TYPO3-dev] Backend extension form fields question

[Steffen Kamper]

Cray Flatline schrieb:
> Hi, All! I'm seeking answer to the noob question.
> 
> I'm creating extension with car base, where I need to have three fields
> in the background.
> 
> Type
> Make
> Model
> 
> I want to make such thing: when I add new item in BE with this extension
> (car), I choose from type for example "motorcycle", so in the Make I
> will see only makes of motorcycles (honda, kawasaki etc.) but not for
> automobiles (i.e. Ford, VW).  And when I choose something from Make
> (i.e. Honda), I want to see in Model only Honda models.
> 
> Can I do it someway? I need to use "type-field" to reload page every
> time I choose from Type or Make? Or I can make it with something like ajax?
> 
> Can anybody give me right direction to see/read/seek? (:
> 
> Thanks a lot!
> Cray Flatline

Hi,

have a look at the documentation and search for DisplayCond
http://typo3.org/documentation/document-library/core-documentation/doc_core_api/4.1.0/view/4/2/

vg Steffen