How can I activate validations on columns in a table

Hi all

Background

I have a tabular presentation, which consists of four columns. The form is based on a view.

The four columns are: localID EXAMPLE 2 EXAMPLE 3 EXAMPLE 4

There are three buttons. Submit, cancel and add the line

I need to allow users to add and edit information from localID but users are not allowed to change the LocalID field.

At first, I thought that it would be best to leave this field to display in text form but only when a user clicks on the add a line to the field LocalID is empty or null, said

So I decided to leave this field as a texfield rather than "show as text (State stops or other)"

I want a validation that invites an error message if a user changes an existing localID

For example:

The table gives the following results

Charlie123 charles anderson 55

Randall12 randall luzzi 20

The user tries to send the current values of the localID change form

123 charles anderson 55

12 randall luzzi 20

Any ideas of how I can do this?

Thank you

CharlieMack

Hello

The validation is triggered for each field in the column DEPTNO. Also for the new fields. If you are not allowed to transfer the column DEPTNO field at all.

Your question, it turns out, is a rather difficult pickle. In short: there is, as far is I know, simple way to validate a column only for existing records, but not for new.

My idea would be to take your little question and look at what you're trying to accomplish: stop the upgrade on a column, but allow insertions.

Take a look at the table of the DEPT on your page 850. I added a dynamic action that defines all DEPTNO existing read-only, but leaves new lines as entrable.

Alternatively, you can fill your LOCALID column by a trigger. This way you can set your column as diplay only (or not entrable) and it will always get a value.

If you want to persist with leaving LOCALID as input fields and launch a validation error on submit, you will need at least a column more than you fill a trigger/sequence. You need something to uniquely identify each line as a reference to records in database.

For the latter, I page 851, the configuration using the EMP table. Validation, each line is identified solely by the EMPNO column. If you change your ENAME, the record is put in correspondence with the value of database based on the EMPNO. If the EMPNO is null, obviously facing a new line, for which we allow an entry for the ENAME field.

Note that adding an additional column is necessary to match each line with the existing values in the database, but requires a change to your datamodel.

This choice I'll give to you

Good luck with it.

Kind regards

Vincent

Tags: Database

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