icalendar devel - Feb 2008 - getting at some of the attributes in my array...

I unpacked the gem so I could make some alterations to the attributes...

array that looks something like this...

@events[0].properties.inspect
"{\"sequence\"=>0,
\"rrule\"=>[\"FREQ=YEARLY;INTERVAL=1;UNTIL=99991231
\"], \"organizer\"=>#<URI::MailTo:0xfdbbdc850
URL:MAILTO:admin_user at tobyhouse.com>,
\"dtend\"=>#<DateTime:
4908935/2,0,2299161>, \"uid
\"=>\"20071218103913.p5z6eezmz0g at srv1.tobyhouse.com\",
\"description
\"=>\"Contact Coyote Fire to schedule\",
\"summary\"=>\"Bethany Fire
Extinguisher Inspection Due\", \"dtstart\"=>#<DateTime:
4908933/2,0,2299161>,
\"attendee\"=>[#<URI::MailTo:0xfdbbda712
URL:MAILTO:someone at tobyhouse.com>, #<URI::MailTo:0xfdbbd981c
URL:MAILTO:another_someone at tobyhouse.com>],
\"transp\"=>\"OPAQUE\",
\"dtstamp\"=>#<DateTime: 212069522089/86400,0,2299161>,
\"location
\"=>\"Bethany\"}"

no problem here...
@events[0].location
=> "Bethany"

or here...
@events[0].uid
=> "20071218103913.p5z6eezmz0g at srv1.tobyhouse.com"

but this is a problem...
@events[0].rrule
NoMethodError: Method Name: rrule

from
./script/../config/../config/../vendor/gems/icalendar/lib/icalendar/component.rb:413:in
`method_missing''
        from (irb):116
        from :0

How can I fix this?

Craig

On Mon, 2008-02-11 at 14:10 -0700, Craig White wrote:
> I unpacked the gem so I could make some alterations to the attributes...
> 
> array that looks something like this...
> 
> @events[0].properties.inspect
> "{\"sequence\"=>0,
\"rrule\"=>[\"FREQ=YEARLY;INTERVAL=1;UNTIL=99991231
> \"], \"organizer\"=>#<URI::MailTo:0xfdbbdc850
> URL:MAILTO:admin_user at tobyhouse.com>,
\"dtend\"=>#<DateTime:
> 4908935/2,0,2299161>, \"uid
> \"=>\"20071218103913.p5z6eezmz0g at srv1.tobyhouse.com\",
\"description
> \"=>\"Contact Coyote Fire to schedule\",
\"summary\"=>\"Bethany Fire
> Extinguisher Inspection Due\",
\"dtstart\"=>#<DateTime:
> 4908933/2,0,2299161>,
\"attendee\"=>[#<URI::MailTo:0xfdbbda712
> URL:MAILTO:someone at tobyhouse.com>, #<URI::MailTo:0xfdbbd981c
> URL:MAILTO:another_someone at tobyhouse.com>],
\"transp\"=>\"OPAQUE\",
> \"dtstamp\"=>#<DateTime: 212069522089/86400,0,2299161>,
\"location
> \"=>\"Bethany\"}"
> 
> no problem here...
> @events[0].location
> => "Bethany"
> 
> or here...
> @events[0].uid
> => "20071218103913.p5z6eezmz0g at srv1.tobyhouse.com"
> 
> but this is a problem...
> @events[0].rrule
> NoMethodError: Method Name: rrule
> 
> from
./script/../config/../config/../vendor/gems/icalendar/lib/icalendar/component.rb:413:in
`method_missing''
>         from (irb):116
>         from :0
> 
> How can I fix this?
----
well, I solved it but I''m not sure why but using
@events[0].recurrence_rules was valid

so in light of no responses from anyone and in case someone follows in
my footsteps, this might be useful.

Craig

Hi Craig,
   This same type of question has come up a number of times in the 
mailing list, which probably means I should improve the examples and 
docs.  Recurrence rules are one of a number of properties that can have 
multiple instances within an event.  For these multiple instance 
properties there are plural methods that return arrays, and then there 
are singular methods to add and remove instances.  If you take a look at 
lib/icalendar/components/event.rb you will see the definition list of 
all the valid properties, along with their plurality.

If I were creating this API to build calendars without having to follow 
a specification it would work differently for a number of things, but 
since the goal is compatibility we are stuck with some oddity.  That 
said, if you have ideas on how to make things cleaner I''m all ears (and
very willing to accept patches :-).

-Jeff

Craig White wrote:
> On Mon, 2008-02-11 at 14:10 -0700, Craig White wrote:
>> I unpacked the gem so I could make some alterations to the
attributes...
>>
>> array that looks something like this...
>>
>> @events[0].properties.inspect
>> "{\"sequence\"=>0,
\"rrule\"=>[\"FREQ=YEARLY;INTERVAL=1;UNTIL=99991231
>> \"], \"organizer\"=>#<URI::MailTo:0xfdbbdc850
>> URL:MAILTO:admin_user at tobyhouse.com>,
\"dtend\"=>#<DateTime:
>> 4908935/2,0,2299161>, \"uid
>> \"=>\"20071218103913.p5z6eezmz0g at
srv1.tobyhouse.com\", \"description
>> \"=>\"Contact Coyote Fire to schedule\",
\"summary\"=>\"Bethany Fire
>> Extinguisher Inspection Due\",
\"dtstart\"=>#<DateTime:
>> 4908933/2,0,2299161>,
\"attendee\"=>[#<URI::MailTo:0xfdbbda712
>> URL:MAILTO:someone at tobyhouse.com>, #<URI::MailTo:0xfdbbd981c
>> URL:MAILTO:another_someone at tobyhouse.com>],
\"transp\"=>\"OPAQUE\",
>> \"dtstamp\"=>#<DateTime:
212069522089/86400,0,2299161>, \"location
>> \"=>\"Bethany\"}"
>>
>> no problem here...
>> @events[0].location
>> => "Bethany"
>>
>> or here...
>> @events[0].uid
>> => "20071218103913.p5z6eezmz0g at srv1.tobyhouse.com"
>>
>> but this is a problem...
>> @events[0].rrule
>> NoMethodError: Method Name: rrule
>>
>> from
./script/../config/../config/../vendor/gems/icalendar/lib/icalendar/component.rb:413:in
`method_missing''
>>         from (irb):116
>>         from :0
>>
>> How can I fix this?
> ----
> well, I solved it but I''m not sure why but using
> @events[0].recurrence_rules was valid
> 
> so in light of no responses from anyone and in case someone follows in
> my footsteps, this might be useful.
> 
> Craig
> 
> _______________________________________________
> icalendar-devel mailing list
> icalendar-devel at rubyforge.org
> http://rubyforge.org/mailman/listinfo/icalendar-devel

Jeff,

I don''t really have ideas but thanks for all your efforts. I understand
the point you are making and am not intending to be critical beyond my
lack of understanding how to deal.

In this case, it seemed clear that the attributes coming from my ical
file used rrule but iCalendar uses some kind of secret decoder ring to
correlate recurrence_rules to rrule. I suspect that much of my
frustration was that I have been trying to go the opposite way...trying
to parse ical files INTO ruby as opposed to creating ical files FROM
ruby.

As I said, I think I am more hamstrung by my lack of ruby skills and my
severe lack of understanding the concept of calendars and ical files.

Thanks

Craig

On Thu, 2008-02-28 at 11:13 +0100, Jeff Rose wrote:
> Hi Craig,
>    This same type of question has come up a number of times in the 
> mailing list, which probably means I should improve the examples and 
> docs.  Recurrence rules are one of a number of properties that can have 
> multiple instances within an event.  For these multiple instance 
> properties there are plural methods that return arrays, and then there 
> are singular methods to add and remove instances.  If you take a look at 
> lib/icalendar/components/event.rb you will see the definition list of 
> all the valid properties, along with their plurality.
> 
> If I were creating this API to build calendars without having to follow 
> a specification it would work differently for a number of things, but 
> since the goal is compatibility we are stuck with some oddity.  That 
> said, if you have ideas on how to make things cleaner I''m all ears
(and
> very willing to accept patches :-).
> 
> -Jeff
> 
> Craig White wrote:
> > On Mon, 2008-02-11 at 14:10 -0700, Craig White wrote:
> >> I unpacked the gem so I could make some alterations to the
attributes...
> >>
> >> array that looks something like this...
> >>
> >> @events[0].properties.inspect
> >> "{\"sequence\"=>0,
\"rrule\"=>[\"FREQ=YEARLY;INTERVAL=1;UNTIL=99991231
> >> \"], \"organizer\"=>#<URI::MailTo:0xfdbbdc850
> >> URL:MAILTO:admin_user at tobyhouse.com>,
\"dtend\"=>#<DateTime:
> >> 4908935/2,0,2299161>, \"uid
> >> \"=>\"20071218103913.p5z6eezmz0g at
srv1.tobyhouse.com\", \"description
> >> \"=>\"Contact Coyote Fire to schedule\",
\"summary\"=>\"Bethany Fire
> >> Extinguisher Inspection Due\",
\"dtstart\"=>#<DateTime:
> >> 4908933/2,0,2299161>,
\"attendee\"=>[#<URI::MailTo:0xfdbbda712
> >> URL:MAILTO:someone at tobyhouse.com>,
#<URI::MailTo:0xfdbbd981c
> >> URL:MAILTO:another_someone at tobyhouse.com>],
\"transp\"=>\"OPAQUE\",
> >> \"dtstamp\"=>#<DateTime:
212069522089/86400,0,2299161>, \"location
> >> \"=>\"Bethany\"}"
> >>
> >> no problem here...
> >> @events[0].location
> >> => "Bethany"
> >>
> >> or here...
> >> @events[0].uid
> >> => "20071218103913.p5z6eezmz0g at srv1.tobyhouse.com"
> >>
> >> but this is a problem...
> >> @events[0].rrule
> >> NoMethodError: Method Name: rrule
> >>
> >> from
./script/../config/../config/../vendor/gems/icalendar/lib/icalendar/component.rb:413:in
`method_missing''
> >>         from (irb):116
> >>         from :0
> >>
> >> How can I fix this?
> > ----
> > well, I solved it but I''m not sure why but using
> > @events[0].recurrence_rules was valid
> > 
> > so in light of no responses from anyone and in case someone follows in
> > my footsteps, this might be useful.
> > 
> > Craig