thr3ads.net - Rails - why''s my course_duration being reset [Aug 2008]

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bingo bob

2008-Aug-31 21:47 UTC

why''s my course_duration being reset

Can''t get this?...I''m close I think, my calculation appears to
be
working, but.... when i access duration = <%= @enquiry.course_duration
%><br> in my final view it''s blank.. course_duration is
getting set to
null but works for the calculation?


controller..
----------

class EnquiriesController < ApplicationController

  layout ''welcome''

  before_filter :login_required, :except => [:new, :create, :blank]

  def index
    list
    render :action => ''list''
  end

  # GETs  should be safe (see
http://www.w3.org/2001/tag/doc/whenToUseGet.html)
  verify :method => :post, :only => [ :destroy, :create, :update ],
         :redirect_to => { :action => :list }

  def list
    @enquiries = Enquiry.find(:all, :order => ''created_at
ASC'')
  end

  def list_by_start_date
    @enquiries = Enquiry.find(:all, :order => ''requested_start_date
ASC'')
  end

  def list_not_responded
    # @enquiries = Enquiry.find(:all, :conditions => ''responded =
null'',
:order => ''requested_start_date ASC'')
    # entity = MyEntity.find_all_by_active(true)
    @enquiries = Enquiry.find_all_by_responded(false)
  end

  def show
    @enquiry = Enquiry.find(params[:id])
  end

  def new


    @enquiry = Enquiry.new
    @courses = Course.active_courses
    @accomodations = Accomodation.active_accomodation
    # @enquiry.course_booking_fee = Course.registration_fee

    render :layout => "welcome"


  end

  def create
    @enquiry = Enquiry.new(params[:enquiry])

    @courses = Course.active_courses
    @accomodations = Accomodation.active_accomodation

    if @enquiry.save

     @enquiry.set_fixed_fees # set the fixed fees
     @enquiry.calculate_fees # calculate

     @enquiry.save

      flash[:notice] = ''Your enquiry has been sent to Europa School of
English. You have received a summary by email. We will contact you
shortly with further information.''
      # redirect_to :action => ''list'' rmoved rf, we need to
go somewhere
else after a new enq.

      redirect_to :action => ''blank'', :id => @enquiry

      # redirect_to :action => "blank"
      Notifier.deliver_signup_thanks(@enquiry)

    else
      render :action => ''new''

    end

  end

  def edit
    @enquiry = Enquiry.find(params[:id])
    @courses = Course.find(:all)
    @accomodations = Accomodation.find(:all)

  end

  def update
    @enquiry = Enquiry.find(params[:id])
    if @enquiry.update_attributes(params[:enquiry])
      flash[:notice] = ''Enquiry was successfully updated.''
      redirect_to :action => ''show'', :id => @enquiry
    else
      render :action => ''edit''
    end
  end

  def destroy
    Enquiry.find(params[:id]).destroy
    redirect_to :action => ''list''
  end

  def blank
    @enquiry = Enquiry.find(params[:id])

  end


end



model
------


class Enquiry < ActiveRecord::Base

  belongs_to :course
  belongs_to :accomodation

  attr_accessor :accomodation_duration, :course_duration


  # before_validation :set_fixed_fees, :calculate_fees

  def set_fixed_fees

    # set accommodation_booking_fee from the Selected Accomodation
    # set course_booking_fee from the Selected Course

    self.course_booking_fee = course.registration_fee
    self.accommodation_booking_fee = accomodation.booking_fee

  end

  def calculate_fees

    # DO STUFF !
    # self.blah_fee = blah_duration * whatever

    self.course_fee = course.price_per_week * course_duration.to_i
    self.accommodation_fee = accomodation.price_per_week *
accomodation_duration.to_i

    @factor = case @duration_in_weeks

      when 1..4
        1.0
      when 5..12
        0.9
      when 13..24
        0.8
      when 25..47
        0.7
      else # from 48 and up
        0.5
      end

    self.course_fee = (self.course_fee * @factor)

    self.total_fee = course_booking_fee + accommodation_booking_fee +
course_fee + accommodation_fee

  end

  validates_date     :date_of_birth, :requested_start_date

  validates_presence_of :title,
                        :firstname,
                        :surname,
                        :address1,
                        :phone,
                        :country,
                        :nationality,
                        :course_duration,
                        :english_level,
                        :course_id,
                        :accomodation_id,
                        :message => "can''t be blank"

  validates_format_of :email, :with => RFC2822::EmailAddress

end
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Frederick Cheung

2008-Aug-31 22:40 UTC

head link

Re: why''s my course_duration being reset

On 31 Aug 2008, at 22:47, bingo bob wrote:
>
>
> Can''t get this?...I''m close I think, my calculation
appears to be
> working, but.... when i access duration = <%= @enquiry.course_duration
> %><br> in my final view it''s blank.. course_duration is
getting set to
> null but works for the calculation?
>Hard to say since you haven''t said what view is involved (top tip -  
pasting 200 lines of code isn''t the best way to get people to read  
your question. try to only include the relevant bits).
Are you under the impression that course_duration will be save to the  
database? it won''t (it''s just a regular instance variable
rather then
an activerecord attribute).

Fred>
> controller..
> ----------
>
> class EnquiriesController < ApplicationController
>
>  layout ''welcome''
>
>  before_filter :login_required, :except => [:new, :create, :blank]
>
>  def index
>    list
>    render :action => ''list''
>  end
>
>  # GETs  should be safe (see
> http://www.w3.org/2001/tag/doc/whenToUseGet.html)
>  verify :method => :post, :only => [ :destroy, :create, :update ],
>         :redirect_to => { :action => :list }
>
>  def list
>    @enquiries = Enquiry.find(:all, :order => ''created_at
ASC'')
>  end
>
>  def list_by_start_date
>    @enquiries = Enquiry.find(:all, :order =>
''requested_start_date
> ASC'')
>  end
>
>  def list_not_responded
>    # @enquiries = Enquiry.find(:all, :conditions => ''responded
=
> null'',
> :order => ''requested_start_date ASC'')
>    # entity = MyEntity.find_all_by_active(true)
>    @enquiries = Enquiry.find_all_by_responded(false)
>  end
>
>  def show
>    @enquiry = Enquiry.find(params[:id])
>  end
>
>  def new
>
>
>    @enquiry = Enquiry.new
>    @courses = Course.active_courses
>    @accomodations = Accomodation.active_accomodation
>    # @enquiry.course_booking_fee = Course.registration_fee
>
>    render :layout => "welcome"
>
>
>  end
>
>  def create
>    @enquiry = Enquiry.new(params[:enquiry])
>
>    @courses = Course.active_courses
>    @accomodations = Accomodation.active_accomodation
>
>    if @enquiry.save
>
>     @enquiry.set_fixed_fees # set the fixed fees
>     @enquiry.calculate_fees # calculate
>
>     @enquiry.save
>
>      flash[:notice] = ''Your enquiry has been sent to Europa School
of
> English. You have received a summary by email. We will contact you
> shortly with further information.''
>      # redirect_to :action => ''list'' rmoved rf, we
need to go
> somewhere
> else after a new enq.
>
>      redirect_to :action => ''blank'', :id =>
@enquiry
>
>      # redirect_to :action => "blank"
>      Notifier.deliver_signup_thanks(@enquiry)
>
>    else
>      render :action => ''new''
>
>    end
>
>  end
>
>  def edit
>    @enquiry = Enquiry.find(params[:id])
>    @courses = Course.find(:all)
>    @accomodations = Accomodation.find(:all)
>
>  end
>
>  def update
>    @enquiry = Enquiry.find(params[:id])
>    if @enquiry.update_attributes(params[:enquiry])
>      flash[:notice] = ''Enquiry was successfully updated.''
>      redirect_to :action => ''show'', :id => @enquiry
>    else
>      render :action => ''edit''
>    end
>  end
>
>  def destroy
>    Enquiry.find(params[:id]).destroy
>    redirect_to :action => ''list''
>  end
>
>  def blank
>    @enquiry = Enquiry.find(params[:id])
>
>  end
>
>
> end
>
>
>
> model
> ------
>
>
> class Enquiry < ActiveRecord::Base
>
>  belongs_to :course
>  belongs_to :accomodation
>
>  attr_accessor :accomodation_duration, :course_duration
>
>
>  # before_validation :set_fixed_fees, :calculate_fees
>
>  def set_fixed_fees
>
>    # set accommodation_booking_fee from the Selected Accomodation
>    # set course_booking_fee from the Selected Course
>
>    self.course_booking_fee = course.registration_fee
>    self.accommodation_booking_fee = accomodation.booking_fee
>
>  end
>
>  def calculate_fees
>
>    # DO STUFF !
>    # self.blah_fee = blah_duration * whatever
>
>    self.course_fee = course.price_per_week * course_duration.to_i
>    self.accommodation_fee = accomodation.price_per_week *
> accomodation_duration.to_i
>
>    @factor = case @duration_in_weeks
>
>      when 1..4
>        1.0
>      when 5..12
>        0.9
>      when 13..24
>        0.8
>      when 25..47
>        0.7
>      else # from 48 and up
>        0.5
>      end
>
>    self.course_fee = (self.course_fee * @factor)
>
>    self.total_fee = course_booking_fee + accommodation_booking_fee +
> course_fee + accommodation_fee
>
>  end
>
>  validates_date     :date_of_birth, :requested_start_date
>
>  validates_presence_of :title,
>                        :firstname,
>                        :surname,
>                        :address1,
>                        :phone,
>                        :country,
>                        :nationality,
>                        :course_duration,
>                        :english_level,
>                        :course_id,
>                        :accomodation_id,
>                        :message => "can''t be blank"
>
>  validates_format_of :email, :with => RFC2822::EmailAddress
>
> end
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

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bingo bob

2008-Sep-01 05:19 UTC

head link

Re: why''s my course_duration being reset

Sorry Fred,

Noted re the tip... here''s a few lines from the view...

<%= @enquiry.course.name %><br>
base price per week = <%= @enquiry.course.price_per_week %><br>
duration = <%= @enquiry.course_duration %><br>  <--- The Line
that''s
null
@enquiry.course_booking_fee : <%= @enquiry.course_booking_fee %><br>

and yes, I thought course_duration would be saved, or to put it another 
way, I''d like it to be?


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Frederick Cheung

2008-Sep-01 08:01 UTC

head link

Re: why''s my course_duration being reset

On 1 Sep 2008, at 06:19, bingo bob
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
> Sorry Fred,
>
> Noted re the tip... here''s a few lines from the view...
>
> <%= @enquiry.course.name %><br>
> base price per week = <%= @enquiry.course.price_per_week %><br>
> duration = <%= @enquiry.course_duration %><br>  <--- The
Line that''s
> null
> @enquiry.course_booking_fee : <%= @enquiry.course_booking_fee
%><br>
>
> and yes, I thought course_duration would be saved, or to put it  
> another
> way, I''d like it to be?
>Then it needs to be a column on your enquiries table.

Fred>
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >
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bingo bob

2008-Sep-01 11:25 UTC

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Re: why''s my course_duration being reset

Frederick Cheung wrote:> On 1 Sep 2008, at 06:19, bingo bob
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
> 
>>
>> and yes, I thought course_duration would be saved, or to put it  
>> another
>> way, I''d like it to be?
>>
> Then it needs to be a column on your enquiries table.
> 
> Fred
It is...that''s why I don''t get it?
enquiries contains a column called "course_duration" of type integer.
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Frederick Cheung

2008-Sep-01 11:30 UTC

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Re: why''s my course_duration being reset

On 1 Sep 2008, at 12:25, bingo bob wrote:
>
> Frederick Cheung wrote:
>> On 1 Sep 2008, at 06:19, bingo bob
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
>> wrote:
>>
>>>
>>> and yes, I thought course_duration would be saved, or to put it
>>> another
>>> way, I''d like it to be?
>>>
>> Then it needs to be a column on your enquiries table.
>>
>> Fred
>
> It is...that''s why I don''t get it?
> enquiries contains a column called "course_duration" of type
integer.
In that case the problem is that you''ve got  
attr_accessor :course_duration. This is replacing the accessor methods  
that read/write from the database column with one that don''t (ie just  
plain old ruby accessor methods backed by an instance variable)

Fred>
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

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bingo bob

2008-Sep-01 18:41 UTC

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Re: why''s my course_duration being reset

Frederick Cheung wrote:> On 1 Sep 2008, at 12:25, bingo bob wrote:
> 
>>> Then it needs to be a column on your enquiries table.
>>>
>>> Fred
>>
>> It is...that''s why I don''t get it?
>> enquiries contains a column called "course_duration" of type
integer.
> 
> In that case the problem is that you''ve got
> attr_accessor :course_duration. This is replacing the accessor methods
> that read/write from the database column with one that don''t (ie
just
> plain old ruby accessor methods backed by an instance variable)
> 
> Fred
you got it, thanks.
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