Apex Asset manager/ ID link with database

Question

Hello,
I use Asset manager demo and i want to know a the link between ID and database is done with "Automatic processing row (DML).
I create my own page and trying to insert data in the database but i have error with the primary key.
ID is a hiden field so no data encoded.

Answer 1

Gus C wrote:
Apex 3.2
We are having problems using database links with lov's
If I use this code in a report, it works
select f.id||' - '||f.name display_value
,f.id return_value
from WWV_FLOW_CUSTOM_AUTH_SETUPS@&P215_DATABASE. a
,WWV_FLOWS@&P215_DATABASE. f
where a.name='CUSTOM_LOGIN_SCHEME'
and A.FLOW_ID = F.ID
order by 1Where P215_DATABASE is a hidden item on the page containing the db link name.
If I use the same code in a lov we get error.You get an error in the App Builder because there's no P215_DATABASE value in the builder's session state, so <tt>&P215_DATABASE.</tt> evaluates to NULL, making the query invalid SQL:
select f.id||' - '||f.name display_value
      ,f.id return_value
  from WWV_FLOW_CUSTOM_AUTH_SETUPS@ a
      ,WWV_FLOWS@ f
where a.name='CUSTOM_LOGIN_SCHEME'
   and A.FLOW_ID = F.ID
order by 1Similar thing will happen in the app at runtime if a session state value for P215_DATABASE hasn't been set.
Change the LOV definition to the Function returning SQL query form, and conditionally include the DB link only if the item has a value:
return '
select f.id||'' - ''||f.name display_value
      ,f.id return_value
  from WWV_FLOW_CUSTOM_AUTH_SETUPS' || case when :P215_DATABASE is not null then '@' || :P215_DATABASE else null end || ' a
      ,WWV_FLOWS' || case when :P215_DATABASE is not null then '@' || :P215_DATABASE else null end || ' f
where a.name=''CUSTOM_LOGIN_SCHEME''
   and A.FLOW_ID = F.ID
order by 1';