Displaying 11 results from an estimated 11 matches for "m000530".
2006 Jun 03
1
Can I tell if the associated record is new in a belongs_to save?
In a belongs_to association, is there a way to tell if the associated object
was newly created?
Hopefully this will explain my question:
A Firm class declares
has_many<http://api.rubyonrails.com/classes/ActiveRecord/Associations/ClassMethods.html#M000530>:clients
and a
client class declares
belongs_to<http://api.rubyonrails.com/classes/ActiveRecord/Associations/ClassMethods.html#M000532>:firm.
Now you do the following:
Create a new firm and add clients using firm.clients.create methods. Note
both firm and clients are unsaved at this poin...
2006 Aug 03
12
More than one has_many :through association between the same 2 models
I wonder if you can have more than one has_many :through association between
2 models.
For example...
I have a model Teacher and a model Class
Now, 1 Teacher works in many Classes, right?. So I need a join model like
class Work < ActiveRecord::Base
belongs_to :teacher
belongs_to :class
end
But I also would like to know if a teacher CAN teach a class before I
2006 Jun 22
1
Active Record question, orphaned children
I have a Deck object and a Card object with their corresponding tables. (You
know a deck of cards.) When I destory a Deck it leaves orphaned cards in
the database. Is there a way to set up the objects with ActiveRecord so that
when a parent object is destoryed the child objects are destroyed as well?
My code below.
class Deck < ActiveRecord::Base
has_many :cards
end
class Card <
2006 May 23
0
does has_many: add a has_<associated_class>? method
...ed info in the has_regions column, so there''s no need to make a
database query.
Is this "synthetic" method documented in the Rails docs? I can''t find
it in the has_many documentation...
http://api.rubyonrails.org/classes/ActiveRecord/Associations/
ClassMethods.html#M000530
How can I avoid that query? Is there any way apart from changing the
name of the has_regions column?
Thanks in advance,
xavi
2006 Jul 05
1
newbie question: Mapping Collections
Hi,
Day 3 with rails here. Forgive me. If this has been covered many times
before, pls just point me at the article.
I worked through the Rolling with Rails tutorial
(http://www.onlamp.com/pub/a/onlamp/2005/01/20/rails.html) built up my
cookbook. Things work great.
I now want to add Ingredients to my app. So, a Recipe will have 1 or
more Ingredients and any single ingredient can be
2006 May 02
3
Ordering Results returned by has_many relationship.
Noob Question 31,265,232
if I''m searching on an object, say order, that has many "order_lines"
and I want to display order lines by Quantity ( an attribute of the
order_lines ) descending
how could I do that without having to do a find() with :order, but
something like;
Order.order_lines.each do |ol|
<!-- code to diplay the line -->
how can I determine the field
2006 May 10
4
Single Table Inheritance problem
I have two tables I am using single table inheritance with: Page and
Item. "Page" has many "Items"; "Item" belongs to "Page".
Item Model:
class Item < ActiveRecord::Base
end
class Article < Item
belongs_to :page
end
Page Model:
class Page < ActiveRecord::Base
end
class Issue < Page
has_many :articles
end
In my controller, when I
2006 Jun 17
2
how to delete a parent record and child records?
Wow, got myself lost as *soon* as I left the hand-holding exercises in
the books.
I''m trying to set it up so when I click the (scaffold-generated)
''destroy'' link on one (of a list) of parent MySQL records, the children
records in a different table get deleted also.
Very simple setup: my tables are ''customers'' and ''accounts''
class
2006 Jul 05
7
HABTM join table has an "ID" column - is this an issue?
All,
I''m building model objects for existing tables that I cannot modify.
In AWDWR, Dave says "Note that our join table has no id column...The
second reason for not including an id column in the join table is that
AR automatically includes all columns from the join tables when
accessing rows using it. If the join table included a column called id,
its id would overwrite the id
2006 May 02
4
Bug in rails ?
Hi !
I just have a simple question.
I am writing an app using rails to familiarize myself with the framework (which is pretty cool, by the way).
I just wanted to know why these two work differently (since "find" should be a synonym for "detect" according to the Pick Axe) :
current_item = @invoice.line_items.detect {|i| i.product.id == key}
current_item =
2008 Jun 15
7
Getting "no block given" on find method - rails 2.1
I am trying to do a simple find through the current_user but get an
exception. Either someone spiked my Starbucks coffee and I am screwing
up all over the place or there is something wrong.
def index
@league = current_user.leagues.find(13)
end
# Error
LocalJumpError in Admin/schedule todosController#index
no block given
If I pass a block to it it works fine, but it is just messy:
=====