Personally, I would advise AGAINST using 2 tables for event storage ...
It could get messy. If you use the link table then they're all treated
the same, you just select everything from the tblEventDates table that's
within the current date range that the calender is displaying or
searching. If there's only one instance then that's fine, if there are
30 then that's fine too - it's all the same. I would think that using 2
tables for storing the "events" would be pointless. You could accomplish
the same thing using one table for events and one for event dates.

For "First Tuesday of Each Month" you would just need to (perhaps)
predefine a list of these types of events. Maybe 3 fields on the form:

[number] [day of week dropdown] [datepart dropdown]
Ie:
[2] [Tuesday] [Month] [SUBMIT]

Then use CF to pre-determine the dates for the timespan before shoving
them in the dates table.


Just my opinion though, worth what it cost you :) 

Joshua Miller
Head Programmer / IT Manager
Garrison Enterprises Inc.
www.garrisonenterprises.net
[EMAIL PROTECTED]
(704) 569-9044 ext. 254
 
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-----Original Message-----
From: Rick Faircloth [mailto:[EMAIL PROTECTED]] 
Sent: Tuesday, January 14, 2003 11:54 AM
To: CF-Talk
Subject: RE: How to handle Calendar Scheduling of Recurring Events?


I'm going to have to give all the input some thought...
a lot of good input...thanks, everyone.

A couple of notes:

This calendar function doesn't have to
bother with overlapping events or show duration.  Just when it starts.
So duration doesn't have to be a factor like it would be in a scheduling
function for a room or something like that.

Also, I don't *think* anyone's approach so far has addressed a problem
with how many recurring community events are scheduled...e.g. "First
Tuesday of each month"...  That causes the date of each month to be
different depending on the month.  I guess I could just code the
function to find the date of the "First Tuesday of each month", then I'd
be set. Right?

Another thing...

How about having two tables for the app...one that holds "one-time"
events and another that holds recurring events with extra fields for
denoting frequency, etc. Then when the calendar processes, output events
from the table of "one-time" events, then have the code search the table
of "recurring" events which have events matching the display date
range...say for the month of February.

Joshua, you hit upon a problem of rescheduling a recurring event for
just one of the times it happens...e.g. next month's meeting will be
rescheduled from the "2nd to the 3rd Tuesday of the month".  The only
way to allow rescheduling would be for the event to have an actual
record in the "one-time" events table. That could happen if the
recurring events table mentioned above was used to insert specific
instances of a recurring event into the "one-time" events table. That
table would then provide the event data for display. (That's the first
way I can think of immediately...)

Finally...

Like Neil suggested and Joshua pointed out, in order to have "granular"
control over event date/time changes, I could just allow all recurring
events to be inserted as individual occurences in the db, for up to,
perhaps, the next 2 years, which would allow annual events to be
schedule for the next 2 years, and would keep the table down to about
5,000 events covering 2 years, assuming about 50 events per week, both
one-time and recurring events.

Then, with each passing week, when the calendar is processed and
displayed, the code adds another week's worth of events from the
recurring events table. It would amount to keeping 2 years worth of
records in the table at once. If required by a client, the time-span of
2 years could be increased if they needed to show more years for
recurring annual events.  ???

Of course, if scheduling certain locations and times was an issue, then
the code could be adjusted to check for conflicts...

More thoughts?

Rick


-----Original Message-----
From: Joshua Miller [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 14, 2003 9:59 AM
To: CF-Talk
Subject: RE: How to handle Calendar Scheduling of Recurring Events?


Actually, rethinking things, a multi-insertion isn't all that bad of an
idea - just using a linked table.

What if the event has one day out of the recurrence that's an oddity -
like if they need to push a Monday meeting to Tuesday one week. If it's
a multi-insertion then you could actually let them edit the individual
instances of the event by adding another record to the events table and
then perhaps reference a "alteration" to a particular event.

I think that using a linked table with only dates would give you more
granular control over the individual event occurrences. In real life,
things get pushed and shoved around to fit into schedules. If they don't
get edited then it's no big deal, using a linked table doesn't actually
use a whole lot of storage space. Besides, drive space is cheap,
processing power is more costly.

Joshua Miller
Head Programmer / IT Manager
Garrison Enterprises Inc.
www.garrisonenterprises.net [EMAIL PROTECTED]
(704) 569-9044 ext. 254

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*************
Any views expressed in this message are those of the individual sender,
except where the sender states them to be the views of Garrison
Enterprises Inc.

This e-mail is intended only for the individual or entity to which it is
addressed and contains information that is private and confidential. If
you are not the intended recipient you are hereby notified that any
dissemination, distribution or copying is strictly prohibited. If you
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-----Original Message-----
From: Robertson-Ravo, Neil (RX)
[mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 14, 2003 9:49 AM
To: CF-Talk
Subject: RE: How to handle Calendar Scheduling of Recurring Events?


nah, dont worry, us Celts have thicker skin that that... I did see what
you meant, and I didnt mean it to be a multi insertion etc....



-----Original Message-----
From: webguy [mailto:[EMAIL PROTECTED]]
Sent: 14 January 2003 14:47
To: CF-Talk
Subject: RE: How to handle Calendar Scheduling of Recurring Events?


> Thats just stupid

Sorry that sounded rude when I reread it! I'll post my solution in a mo.





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