Question

lotus notes functions

Asked by: BillTr

I'm looking into a problem on a database that seems to be driven by the functions on the form. Both forms have an action that looks up user names from a list, checks their status and presents error messages back. This code is working. But the developer presents the error messages back to the users by updating multiple computed fields. Then uses hide formulas based on these computed fields. He has this going several layers deep with computed fields using formulas that reference other computed fields. I lean pretty heavily towards script and only use formulas when I have to, so I have a real problem with that.

Anyway...
On one form, this design seems to work fine. On the other, the hide functions don't seem be getting invoked correctly. The action is working, when I take the hide functions off I can see the error messages. I think the problem lies in the order that the computed fields are getting executed.

I have a workaround... I change the field that was updated by the script to an editable field. But, the other form works with it as a computed...I'd like to understand that.

So... what are the rules around functions? What order to they execute in?

Thanks

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Asked On
2009-11-04 at 08:01:24ID24871290
Tags

lotus notes

Topic

Lotus Notes

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Answers

 

by: mabowdenPosted on 2009-11-04 at 09:39:38ID: 25741799

I'm not sure if this is much help, but a form is evaluated top to bottom, left to right.  So any fields on the top of the form are executed first, then they move across from left to right.  Then the next line down and so on.  I have often had to use "hide when" formulas at both the top and bottom of the form, depending on when the evaluation takes place.

 

by: chuckaliciousPosted on 2009-11-04 at 09:45:13ID: 25741849

There's kind of a lot to this answer. My understanding is that the formulas will be calculated top down, so a field at the top of the form will be calculated before a field at the bottom of the form.

However, within each field, if there is more than one bit of formula, then there is also an order of execution.

You are best looking at the Lotus Domino Designer Help for specific details on this one though.

2 sections to look at, from the index, are "Formula Language" and the subsection "operator precedence" and also the section on "@Commands" and the subsection "order of evaluation".

Are there any events being triggered such as PostOpen, QueryOpen etc? Just in case something in there is also doing some work.

 

by: sjef_bosmanPosted on 2009-11-06 at 05:19:18ID: 25758792

On the non-working form, what if you type the F9-key, to reevaluate? If the info shows up correctly, it is a field evaluation problem on the form. The forms, once opened as described above, are they in edit-mode, i.e. when exactly do you see this behaviour? Or is the action only available in edit-mode?

20120131-EE-VQP-002

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