[TYPO3-dev] Backend extension form fields question

[Cray Flatline]

Dmitry Dulepov [typo3] wrote:

And one more strange thing.

1) I add new car item. Choose Type: Auto, Make: Honda. Near the Model I
press + to add new Model.

2) I see form with new model (type, Make, Model Title fields). I change
Type to Moto, form reloads.

3) I see no form, just header and footer
================================================
Модель транспортного средства [12] - [No title]
	

Show secondary options (palettes)
================================================

Does any chances to fix it? Or I just have to remove "+" and don't use
it? ((:

> Cray Flatline wrote:
>> 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? (:
> 
> Firsts, you need to add "Make" field into "requestUpdates" in the "ctrl"
> section of TCA.
> 
> Next you need to read through "select" section of the "TYPO3 core API"
> and see how you can use foreign_table_where to show values of one field
> using values of another.
> 
> It is all possible.
>