Where do I add a trigger for "Notes and Attachments" in salesforce.com?

I cannot find where i开发者_JAVA技巧n the salesforce.com UI I can add a trigger on a file attachment. I can find triggers on almost everything else, but attachment seems to be missing from the list (even when I view source on the page and search it. Does anyone know WHERE I can put this trigger in?

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There is no way to do it directly as Attachment is one of those "lesser" objects that salesforce really gets "protective" about in a random and biased way. The only "legit" way to do it is to use some external build&deploy tools such as Force.com IDE.

If however you are not a stranger to undocumented 'hacks' do the following. Go to any object's trigger list and click create new. In the URL locate entity query string parameter (e.g. entity=Case) and change it to Attachment (entity=Attachment) and press Enter. Newl loaded screen will accept Attachment trigger.

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Using Eclipse (Force.com IDE plug-in), right-click on your project & select "New" > "Apex Trigger". In the dialogue window that pops up, there is an "Object" dropdown / picklist, choose the object you want from this list - "Note" or "Attachment" etc. - then choose the "events" you want to trigger to execute on.

NOTE: a best practice is only one (1) trigger per object since you cannot guarantee the order in which multiple triggers on the same object will execute.

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Have you tried creating the trigger from, force.com IDE??

In my opinion it should be possible from there.

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To write a trigger for attachment, there is no straight way to do it but you can do it.

By creating a trigger on other object for example create a trigger in contact object then the url of the current page shows
"https://ap1.salesforce.com/........./&entity=Contact" you have to change "entity=Attachment"
then the trigger will be created for attachment object.