Using Triggers

[ajith]

Hi,

I am trying to use Triggers for the first time.

I have a table named hmEmployees for which I have defined a trigger by naming an item in the same library as Trigger_hmEmployees . I wanted the trigger to insert part of the info from the table into another table, which was not working. So, I changed the code to

function(transaction, oldrecord, newrecord)
	{
	Inspect(newrecord)
}

Whether I output a new record, delete a record or modify an existing record in the table hmEmployees through an Access, the Inspect(newrecord) doesn’t get called.

What is it that I am doing wrong?
Thanks,
ajith

[j_ferguson]

Hi Ajith,

I tried the same thing on my copy and it worked even when I was using AccessControl to insert records. My table is a very simple table and I am running suneido.exe standalone.

If you are running client-server, the trigger will be executing on the server side and the Inspect will not work as expected. In that case you could try using SuneidoLog, or writing to a file instead to debug your trigger.

If you are running Suneido standalone, it is possible there is something about your table that is different from the simple one that I set up. Again, writing to a file (you can use the AddFile function for that), or SuneidoLog would be a better option for debugging than using Inspect in your trigger.

I hope this helps you figure it out. If not, with a little more information we should be able to sort it out.

[j_ferguson]

I also forgot to mention that if you are running client-server and you modify a trigger function, you may have to unload that trigger code on the server so that it re-loads your new code:

ServerEval(‘Unload’, ‘Trigger_tmEmployees’)

Or, you can use a brute-force method of restarting the Suneido server, that works too.

[ajith]

Hi Jeff,

Thanks to your reply. Great to hear from you after a long time.

I deleted my table and re-created it and the trigger is getting called. But, it is not working as expected, instead it is giving an error. I will look into that error and get back if I need your help.

I noticed that the trigger doesn’t get called if the the library entry for the trigger is made after the table is constructed. I checked it twice by deleting the table and re-creating it and got the same pattern. I am running Suneido as standalone. My table has a details table linked to it and has two keys, one of which is a compound key from three columns.

Thanks,
ajith

[j_ferguson]

Hi Ajith,

It shouldn’t matter when the trigger definition is created. I wonder if there is an error or exception happening that you are not noticing? If this continues to be a problem, you might consider attaching an export of your trigger definition as well a dump of the table the trigger is on.

Thanks.

[ajith]

Hi Jeff,

Thanks for your reply. May be I missed some error as you say. Except for the initial trouble I had which was solved by re-defining the table, it is working as I wanted.
Thanks,
ajith

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