JSON error when passing items into a Dynamic PL/SQL action

Question

Hi,
APEX 4.1.1, Oracle RDBMS 11.2.0.3
I have a recipient field whose value is intended to be dependent on two other fields on the page (a select list and a number field).
I have an on-change 'set-value' DA on the number field with a set type of 'PL/SQL Function Body'.
Currently the function body is simply "return '1234';".
This works unless I specify 'Page Items to Submit'. Once I do this, the recipient field is no longer populated and FireBug console reports the following error:
SyntaxError: JSON.parse: unexpected character
http://loordv02/i_411/javascript/apex_4_1.min.js
Line 16
Any ideas?

Answer 1

I was getting the same error, so I looked at the records for the POST event in firebug. Scrolling through the Response tab, I found the following:
<div class="rc-body">
<div class="rc-body-r">
<div class="rc-content-main">
<div class="sErrorText">
<strong>ERR-1002 Unable to find item ID for item "" in application "108".</strong>
<strong>Unexpected error, unable to find item name at application or page level.</strong>
<div><div class="error_technical_info"><a href="#" onclick="htmldb_ToggleTableBody('error_technical_info_expand_icon', 'error_technical_info'); return false;"><img src="/m/htmldb/builder/rollup_plus_dgray.gif" class="pseudoButtonActive" id="error_technical_info_expand_icon" alt="">Technical Info (only visible for developers)</a><ul id="error_technical_info" style="display:none"><li>is_internal_error: true</li><li>apex_error_code: WWV_FLOW.FIND_ITEM_ID_ERR</li><li>component.type: APEX_APPLICATION_PAGE_DA_ACTS</li><li>component.id: 2428123999040673</li><li>component.name: NATIVE_EXECUTE_PLSQL_CODE</li><li>error_backtrace: <pre>----- PL/SQL Call Stack -----
  object      line  object
  handle    number  name
0x9f9cd014       717  package body APEX_040100.WWV_FLOW_ERROR
0x9f9cd014      1064  package body APEX_040100.WWV_FLOW_ERROR
0xa9542cb0      1564  package body APEX_040100.WWV_FLOW
0xa9542cb0      1293  package body APEX_040100.WWV_FLOW
0x9f94844c       939  package body APEX_040100.HTMLDB_UTIL
0x86fc3c74        31  anonymous block
0xa92f4f64      1926  package body SYS.DBMS_SYS_SQL
0x9f9dc50c       966  package body SYS.WWV_DBMS_SQL
0x9f9dcbc0       649  package body APEX_040100.WWV_FLOW_DYNAMIC_EXEC
0x9f932078      1820  package body APEX_040100.WWV_FLOW_PLUGIN_UTIL
0x924e28e4       416  package body APEX_040100.WWV_FLOW_NATIVE_DYNAMIC_ACTION
0x9f9e7204      1898  package body APEX_040100.WWV_FLOW_PLUGIN_ENGINE
0x9f9e7204      2572  package body APEX_040100.WWV_FLOW_PLUGIN_ENGINE
0xa9542cb0      7249  package body APEX_040100.WWV_FLOW
0x9f5c0198        31  anonymous block
</pre></li></ul></div></div>It is possible that a similar error block is failing to render in your response, which may help you diagnose the problems in your anonymous block (PL/SQL action in the Dynamic Action).
Hope that helps!
Jeremiah
Edited by: JEvans on Sep 5, 2012 12:01 PM
P.S. Fixed my anonymous block issue as well. Could you post the following from your Execute PL/SQL Code action please?
PL/SQL Code
Page Items to Submit
Page Items to Return
My guess is there's something conflicting in there, that's where I was going wrong.
Thanks,
Jeremiah
Edited by: JEvans on Sep 5, 2012 12:08 PM