Displaying 20 results from an estimated 2000 matches similar to: "delete_if doesn''t work for has_and_belongs_to_many"
2006 Jul 30
8
Method_missing from Ruby for Rails book
I''m having a problem getting this example from the book to work:
class Cookbook
attr_accessor :title, :author
def initialize
@recipes = []
end
def method_missing(m, *args, &block)
@recipes.send(m, *args, &block)
end
end
cb = Cookbook.new
cb << recipe_for_cake
cb << recipe_for_chicken
beef_dishes = cb.find_all {|recipes| recipe.main_ingredient ==
2006 Jul 17
14
REST Relationship Models
I''m trying to figure out an elegant way to do this:
I have the following three tables:
people, employer, employees
And consequently the following three models:
class Person < ActiveRecord::Base
end
class Employer < ActiveRecord::Base
has_many :employees
end
class Employee < ActiveRecord::Base
belongs_to :person
belongs_to :employer
end
I want to be able to say:
2006 Jul 26
2
newbie - HABTM confused...
I have a users table. I have a assignment table. and I have to log in
to see my assignments. i can and I hasve a session id.
I can make a new assignment and save my id in the user_id field of the
assigment table.
I want to share my assignments. so I can create a assignments_users
table. this way I can have assignment 1 shared with user 1 and 2. and
If I log in as user 1 or 2 I see the assignment.
2006 Jul 16
17
AWDWR question
In an early section on Action View, showing code being put directly
into the rhtml file:
<% require ''date''
DAY_NAMES = %w{ Sunday Monday Tuesday Wednesday Thursday Friday Saturday }
today = Date.today %>
<h1>Hello, Dave</h1>
<p>
It''s <%= DAY_NAMES[today.wday] %>.
Tomorrow is <%= DAY_NAMES[(today + 1).wday %>.
</p>
I get this
2006 Apr 27
5
ERb on he command line re: Ruby For Rails book
Hi,
I am working thru the Ruby for rails book. On page 30 David Black
talks about running erb from the command line i.e. $ erb erbdemo.rb
just as you would a normal ruby prog ($ ruby erbdemo.rb) but when I
try to do this I get command not found. How do I make this work? I am
running Linux (Ubuntu Breezy)
Regards,
Paul
2006 Jul 31
2
[UPDATE] More info on RubyConf 2006 registration
Hi --
Registration for RubyConf 2006 is still scheduled to open on August 2,
in the early evening Pacific (US West Coast) time.
Also, there''s more info at http://www.rubycentral.org/conference
(e.g., the fact that this year we''re only taking credit cards, etc.).
David
P.S. Any LA area Rubyists around? I''ll be there this week doing Rails
training.
--
2006 Feb 10
15
"Ruby for Rails" in early access release
Hi --
My book "Ruby for Rails" is now being released one chapter at a time
through the Manning Early Access Program, with the whole book
due to appear on May 1.
If you''re interested, see http://www.manning.com/books/black
(I guess I could have just sent my sig with no body, but anyway :-)
David
--
David A. Black (dblack@wobblini.net)
Ruby Power and Light
2006 May 11
7
[ANN/ADV] Ruby for Rails now published in paper!
Hi --
I''m on the road, so I haven''t laid eyes on it yet -- but word on the
virtual street is that "Ruby for Rails: Ruby techniques for Rails
developers" is now out in paper.
It will probably take a little longer to trickle to your neighborhood
Barnes and Noble... but you can order it now from the publisher. See
http://www.manning.com/black. And trickle it will, too.
2006 Jul 11
4
Variable Losing it''s Value
I fired up my rails app after a few weeks, only to find it was broken,
in that the variable seems to be losing it''s value somewhere between the
controller and the view. I''ve broken it down to the absolute simplest
test, and here is what I get:
THE CONTROLLER (controllers/visits_controller.rb)
class VisitsController < ApplicationController
def list
@test = "test"
2010 Oct 11
8
Nooby Stuck - "has_and_belongs_to_many" relationship
trying to set up a "has_and_belongs_to_many" relationship
would very much appreciate the help, not sure what im doing wrong at all.
Scheme.rb
class Scheme < ActiveRecord::Base
validates :schemename, :presence => true
belongs_to :user
has_many :levels, :dependent => :destroy
has_and_belongs_to_many :works
end
Work.rb
class Work < ActiveRecord::Base
2006 May 31
7
How to render from with <%%> ?
I have a loop that I iterate through in my view.
<%
coll.each do |itm|
puts(itm.value)
end
%>
How do I render the itm.value without using a <%= %> tag? Should puts
not work?
Joerg
P.S. There is a good enough reason for me wanting to do this :-)
--
Posted via http://www.ruby-forum.com/.
2006 Mar 20
11
has_many brings back ''uninitialized constant''
hello. first things first - I am new to ruby on rails (ruby, too), so
I''m figuring this is just a basic newbie error.
I''m creating a basic photography website. And I have two tables with a
relationship:
photos:
- id (set up as PK)
- title
- shutter
- aperture
- date
- the_order
...etc
photo_comments:
- id (set up as a PK)
- photos_id (set up as a FK)
- author
- date
-
2006 Jul 12
12
pass hash as parameter
Hello,
How can I pass a hash as parameter from a template with url_for?
e.g. : if I have
test = { :a => "a", :b => "b" }
How can I pass that with my request? Is it possible to pass nested
hash''es to?
Right now,
url_for :action => :test, test
doesn''t seem to work.
Thank you,
--
2006 Jun 09
1
any errata for second printing of "Ruby for Rails"?
Hi all --
The second printing of "Ruby for Rails" is happening soon. If you''ve
spotted any small errors, let me know... like... *very* soon :-)
(I want to know about large errors too, but those fixes won''t make it
into this printing :-)
Thanks!
David
--
David A. Black (dblack@wobblini.net)
Ruby Power and Light, LLC (http://www.rubypowerandlight.com)
See what
2006 Jun 28
1
European Rails Conf -- talk proposals now being accepted
Hello all --
And a special greeting to those of you who were at RailsConf 2006 in
Chicago. You know how great the event was, and how great the European
Rails Conference is going to be in London in September!
We''re now accepting proposals for talks at the European Rails
Conference, to be held September 14-15 in London. Accepted speakers
will get free admission to the conference.
2006 Aug 10
6
Partials - asked before never got reply
I''m trying to figure out how multiple partials in one page would be
configured when they are based on some action in the controller.
As an example -
I have a main/welcome page. If someone new or a user not logged in
arrives at this page I display both a registration form and a login
form. However, if they are logged in then those forms should not show
up on that page. Also should
2006 Jul 12
5
DRY version of RoR book PAYMENT_TYPES example
In the book there is an example how to convert DB payment value to more
readable from. PAYMENT_TYPES array is defined and then in your views you
can use it as Order::PAYMENT_TYPES.
The problem is: how should I convert DB values (for example with type
char(1)) to full string representation. I know that I can add a Hash to
a model: IM = {''S'' => ''Skype'',
2006 Feb 10
12
Accessing ''many'' variables
Hi,
I have a class called Outlet which has_many Jacks. Apart from internal
id, each jack is unique by the attribute ''color''.
I''d like to iterate through each Outlet, and be able to output data
for a Jack of a certain color.
Say, I want to access the orange jack for the current outlet:
<td><%=h outlet.jack.color[''O''].ip_address
2009 Feb 04
2
delete_if does not work on associations
I tried to user delete_if on an association:
class Group < ActiveRecord::Base
has_many :memberships, :dependent => :destroy
has_many :users, :through => :memberships
...
end
This is the controller method, trying to use delete_if. Although some
elements are removed (s2 < s1), the save method does not update the
association.
def intersect_or_remove_group
other_group =
2006 May 26
4
shouldn''t this work? - session[:array_of_objects].delete_if {|x| x.id == params[:id]}
I am saving an array of active record objects (college courses) in the
session as session[:course_list]. This is the cart for a registration
controller.
If a student chooses to delete the course from the list I get the :id
as params[:id].
However if I do
session[:course_list].delete_if {|x| x.id ==params[:id]}
does not work.
session[:course_list].delete_at(idx)
works. Ocourse to do this I have