You could put a two choice radio button. Choice  one autodetect. Choice two 
choose adaptor. Default to choice one. Enable drop down when choice two is 
selected.

Tony Giaccone

On Oct 23, 2018, at 8:58 AM, Andrus Adamchik <and...@objectstyle.org> wrote:

>> I guess we can make "autodetect" a default in that dialog.
> 
> Hmm.. we can't. As this dialog is shown before we even connect to DB. 
> 
> Andrus
> 
> 
>> On Oct 23, 2018, at 3:45 PM, Andrus Adamchik <and...@objectstyle.org> wrote:
>> 
>> Yeah, you'd need to select the specific adapter right in the generation 
>> dialog.
>> 
>> I guess we can make "autodetect" a default in that dialog.
>> 
>> Andrus
>> 
>> 
>>> On Oct 23, 2018, at 2:22 PM, Tony Giaccone <t...@giaccone.org> wrote:
>>> 
>>> It might be useful for the Modeler to auto-detect as well because if you do
>>> schema generation, you end up with different sql from the modeler than the
>>> runtime.  We started a dbdeploy process, and the sql generated was captured
>>> from the modeler with the JDBC plain adaptor for the auto_pk, but then
>>> instances also  sequences  because some of the it was originally done using
>>> schema generation and it got  confusing.
>>> 
>>> 
>>> Tony
>>> 
>>> On Tue, Oct 23, 2018 at 12:40 AM Andrus Adamchik <and...@objectstyle.org>
>>> wrote:
>>> 
>>>> If you don't set the adapter, Cayenne will auto-detect the DB type in
>>>> runtime and install a proper adapter. Modeler doesn't do auto-detection,
>>>> but the runtime does. In fact I don't remember when was the last time I had
>>>> to specify an adapter explicitly.
>>>> 
>>>> Andrus
>>>> 
>>>> 
>>>>> On Oct 23, 2018, at 12:38 AM, Tony Giaccone <t...@giaccone.org> wrote:
>>>>> 
>>>>> I understand that the kind of PK support that Cayenne uses depends on the
>>>>> adaptor you use. When you use:
>>>>> 
>>>>> org.apache.cayenne.dba.postgres.PostgresAdapter
>>>>> 
>>>>> you get sequences, not the pk_auto table.
>>>>> 
>>>>> I see where you can pick the adaptor as part of a database schema
>>>>> generation. What's less clear to me, is what adaptor is used if cayenne
>>>>> detects that a schema needs to be generated.  Or more generally what
>>>> causes
>>>>> a dba adaptor to end up in the stack.
>>>>> 
>>>>> Is there some kind of database detection that determines which adaptor
>>>> get
>>>>> used?
>>>>> 
>>>>> I didn't think we were explicitly setting it to PostgresAdapter, and yet
>>>> we
>>>>> still ended up with sequences. Of course it's possible that someone on
>>>> the
>>>>> team did, so I don't want to rule that out as a possibility, but it
>>>> occurs
>>>>> to me that there might be some kind of detection especially in cases
>>>> where
>>>>> the schema is being generated "automatically".
>>>>> 
>>>>> 
>>>>> Tony Giaccone
>>>> 
>>>> 
>> 
> 

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