Adding a sequence as a default value for a column in a table field

Hi all

APEX 4.2.4. Oracle XE 11.2

I'm trying to add a default value from a sequence to a column in a table field, so he fills when I hit the "Add Row" button...

The reason for this by the way, rather than simply using a sequence database and the trigger on the column (which exists and works very well), is that I try also add detail records to the line when I create, and I can not, I do not have the ID of the parent to the child records.

Looking at the docs, (for example oracle 11 g pl/sql enhancements), I thought I'd have be able to use a PL/SQL expression as to_char (petty_cash_seq. NEXTVAL) or to_number (petty_cash_seq. NEXTVAL) or all that kind of expression that extracts the sequence.nextval, as it became available in PL/SQL on the database

so, Ive tried

TO_CHAR (petty_cash_seq. NEXTVAL) in tabular form attributes - column default / PL/SQL expression and he said ORA-02287: unauthorized number sequence here...

Ive also tried rolling upward in a PL/SQL package, as below:

DECLARE v_seq_value NUMBER; BEGIN select petty_cash_seq. NEXTVAL in the double v_seq_value; return v_seq_value; END;

and I get ORA-00923: KEYWORD not found where expected.

Can anyone help as to why neither of them do not seem to work as an expression / packages in the default type?

or... a simple alternative to get the ID of the next record when I hit 'Add Row' before I can create child folders at the same time...

And I've been mulling over the merits of the master / detail integrity and try to think in an orderly manner to create the mask, add the details without having to first submit the master, then go back and go into details... And put it into context, its a request for costs where users create an expense entry and download copies of their expenses at the same time...

Thank you very much

Richard

Use a combination of AJAX and JavaScript to get the next value in the sequence in a version substituted the line Add.

1. on the page editor, right-click on the Ajax callbacks and select Create.

2. on the next page, select PL/SQL. Do * not * select the tabular presentation. Leave this field blank.

3. name your process, e.g. getNextSequence

4. Add the code (under the DIRECTION of your own names of the object):

DECLARE
    ln_NextSequence NUMBER := 0;
BEGIN
    SELECT MY_SEQUENCE.NEXTVAL
    INTO ln_NextSequence
    FROM DUAL;

    HTP.P(TO_CHAR(ln_NextSequence));
END;

5. When you look now, you will see that the button Add a line called javascript:addRow (). Remove all this and change the button to be triggered by a dynamic action.

6. create a dynamic action when a click on your button to add a line

7. Add the following JavaScript code to get the new value of the sequence using your AJAX call from above and then place it on the newly added line:

var nextSequenceID;

apex.server.process(   'getNextSequence'
                     , {}
                     , { dataType: "text",
                         async: false,
                         complete: function( ajaxResponse )
                                  {
                                    nextSequenceID = ajaxResponse.responseText;
                                  }
                       });

addRow();

$('td [headers="YOUR_ID_COLUMN_NAME_HERE"] input:last').val(nextSequenceID);

-Joe

Tags: Database

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Adding a sequence as a default value for a column in a table field

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