Hi guys,
I have a table, “calendar_items”, which has a date/time column named
“reminder”. What I want to do is have the user select “x minutes
before start” on the form which calculates the reminder date/time
field from the start date/time. I figured the best way for this to
happen is to have an “attr_accessor :reminder_select” which is the
string/select on the form and then in the model, calculate the
reminder field before saving the record. Only problem is, it doesn’t
work!
Can anyone see where I’ve gone wrong? My guess is that when Rails
attempts to take the form data and save it to the model, it’s calling
the “reminder_select” method again, which resets the variable (to
“none”) instead of using the form data.
Thanks in advance, here’s the code:
VIEW:
Start: <%= datetime_select ‘calendar_item’, ‘date_time’, {:order =>
[:day, :month, :year], :start_year => Time.now.year, :minute_step =>
Reminder: <%= select(:calendar_item, :reminder_select, %w{ none 5
minutes 15\ minutes 30\ minutes 1\ hour 2\ hours 6\ hours 12\ hours 1
\ day 2\ days 7\ days 14\ days }) %>
CONTROLLER: (uses the generated methods for edit/update)
MODEL:
class CalendarItem < ActiveRecord::Base
attr_accessor :reminder_select
before_save :calculate_reminder
def reminder_select
return “none” if !self.date_time or !self.reminder
difference = self.date_time - self.reminder
if difference > 0 and difference < 1.hour
return difference.minutes.to_s + " minutes"
elsif difference > 0 and difference < 1.day
val = (difference / 60 / 60).to_i
if val > 1
val = val.to_s + " hours"
else
val = val.to_s + " hour"
end
return val
elsif difference > 0
val = (difference / 60 / 60 / 24).to_i
if val > 1
val = val.to_s + " days"
else
val = val.to_s + " day"
end
return val
else
return "none"
end
end
protected
def calculate_reminder
if self.reminder_select == “none”
self.reminder = nil
return
end
words = self.reminder_select.split(" ")
if words[1][0..5] == "minute"
self.reminder = self.date_time - (words[0].to_i).minutes
elsif words[1][0..3] == "hour"
self.reminder = self.date_time - (words[0].to_i).hours
elsif words[1][0..2] == "day"
self.reminder = self.date_time - (words[0].to_i).days
end
end
end