Hi,
I am trying to implement a check in my pages so that if user A is editing
record 1 from edit form A at the same time that user B is editing record 1
from edit form B, the user who submits it second will get an error that
someone has just updated this record.
I have a field in my table called "status_date", which is populated with the
sysdate every time a record is updated.
This is what I've attempted:
In each form page itself, I've immediately queried the current status date
for the record. When I display this on the page for testing purposes, it
displays in the format 2000-08-25 10:22:39. I then assign this value to a
variable called "last_status_date". Then I pass last_status_date as a
hidden field to my action page (the page that does the updates.
Immediately in my action form (before any updates are made, I have the
following:
<!--- immediately check status_date again to make sure no one else has
updated it while the form was being filled out --->
<cfquery name="getstatus" datasource="CF_3IS" dbtype="ODBC">
SELECT STATUS_DATE
FROM SUG_SUGGESTIONS
WHERE SUGGESTION_ID=#URL.SUGGESTION_ID#
</cfquery>
<cfset datedifference = #getstatus.status_date#-#form.last_status_date#>
<cfif ("datedifference") LTE 0>
<cfabort showerror="Another user has just updated this suggestion. Please go
back and refresh your browser to view the data inputted by this user, as it
may affect your data entry.">
</cfif>
I have displayed the output of datedifference to see what is going on...
On my action page, this is what I get for output:
form last status date: 2000-08-25
status check from this page: 2000-08-25 10:40:59
difference: 0.445127314815
What is happening is that for some reason, the time portion of
form.last_status_date is not passing with the hidden field, even though
form.last_status_date fully displays on the form page as desired. Why would
this be?
Also, I believe that my reasoning is flawed for what I am trying to do,
because of the actual dates. Should I be using different logic for
determining if the record has been updated by user A just before user B
submitted?
Does this make sense?
Thanks!
T
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