Displaying 20 results from an estimated 5000 matches similar to: "ActiveRecord Polymorphic Inheritance"
2009 Jan 21
3
Nested serialization with to_json and to_xml with array and hash element
Title: Nested serialization with to_json and to_xml with array and
hash element
class Person < ActiveRecord::Base
has_one :address
has_one :job
def office()
return "Executive_Suite"
end
end
class Address < ActiveRecord::Base
belongs_to :person
end
class Job < ActiveRecord::Base
belongs_to :person
has_one :paygrade
def Title
return "Engineer"
end
end
2008 Apr 11
1
polymorphic associations wrong when used with inherited class?
Consider the following:
class Event
belongs_to :event_object, :polymorphic => true
end
class Asset < ActiveRecord::Base
end
class EventedAsset < Asset
has_one :event, :as => :event_object
end
EventedAsset.find(:first).event generates the following SQL:
SELECT * FROM `events` WHERE (events.event_object_id = 1 AND
events.event_object_type = ''Asset'') LIMIT 1
2009 Aug 07
0
How to specify ActiveRecord's to_json encoding
Question:
Hi, our company is using Ruby 1.8.6 with Rails 2.2.2. Does anyone
know we can explicitly specify what encoding to use when calling
to_json() or to_xml() methods?
Problem:
We have some multibyte characters in our database. For example we
have a table with a name column that has this French accented e: Café
Records. When we serialize this object using ActiveRecord''s to_xml()
2010 Apr 05
2
Harmonizing JSON/XML serialization
The way Rails handles root nodes in JSON and XML serialization is
inconsistent. This has been discussed before:
https://rails.lighthouseapp.com/projects/8994/tickets/2584-232-activeresource-json-doesnt-send-parameters-with-root-node
This seems mostly taken care of with
ActiveModel::Base.include_root_in_json, especially if/when it ends up
in ActiveResource. However, there is also the issue of how
2010 Feb 20
1
Advanced use of to_xml and to_json
Hello,
I''m working on a Rails app which has a REST API. I manage two formats
JSON and XML.
Very often to simplify the use if the API, I''m making includes. But when
you add params to to_json and to_xml like :only, :except, it''s not only
applied on the root object but on all the objects included.
Do you know libs or methods to answer to these different problems:
* Tell
2009 Jun 14
3
Basic AJAX Response (Mootools)
Hi,
I''ve done AJAX calls to Rails'' Controllers before yet never required to
generate a response back to the view. In this respect, I have tried to
keep it moronically simple and just add a node to see that it works, yet
the response doesn''t come through / isn''t interpreted as it should. Long
story short, code :
// Have to use Mootools to integrate a
2010 Jul 17
1
not able to find to_yaml definition
I am looking at rails edge source code.
I am able to do
puts User.find.to_yaml
However I am not able to find piece of code where ''def to_yaml'' is.
How this to_yaml serialization is working?
can fully understand how to_json and to_xml is working but to_yaml
beats me.
Thanks
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2008 Oct 29
5
Polymorphic Associations with inheritance
I have two models, Article and Post, that has many Comments. However,
both Article and Post are inherited from a BaseContent class like so:
class Article < BaseContent
has_many :comments, :as => :commentable
end
class Post < BaseContent
has_many :comments, :as => :commentable
end
and here''s my Comment model:
class Comment < ActiveRecord::Base
belongs_to
2007 Jan 17
4
changing the default behaviour of to_xml for has-many: associations
I recently submitted a patch to work around an issue I was having &
added a new optional behaviour to the to_xml method but on further
reflection I wonder if the default behaviour should be changed.
The gory detail, documentation and test case is all here...
http://dev.rubyonrails.org/ticket/7004
Here''s a brief example...
class Person < ActiveRecord::Base
has_many: children
2006 Mar 27
1
polymorphism + inheritance
Hi,
currently I do some work with polymorphic associations in egde rails
class Order < ActiveRecord::Base
belongs_to :payment, :polymorphic => true
end
class CreditCardPayment < Payment
end
class PayPalPayment < Payment
end
class Payment < ActiveRecord::Base
has_one :order, :as => :payment
# common stuff in here
end
I want to use [Payment] for common functionality
2007 Mar 28
7
Rails, REST and JSON
Hi everyone,
I''m writing a lightweight AJAX application using Rails on the server side as
a RESTful web service provider.
I need the web service to support both JSON and XML I/O. Outputting data in
XML and JSON is easy (using to_xml and to_json),
and it''s also easy to do XML input as Rails does it for you automatically.
Is it possible to somehow have the same
automatic parsing
2006 Jul 26
3
Polymorphic Association with Single Table Inheritance?
Hello,
is it possible to setup a model/table schema like this:
Groupable --> Membership <-- Group
^ ^
| |
User UserGroup
I tried the following but failed:
Groupable (table with ''type'' column)
has_many :memberships, :as => :groupable
has_many :groups, :through => :memberships
2007 Dec 20
0
polymorphic has_many :through Vs Inheritance
Hi everyone.
Ive part of a project that I need to refactor, and im having some
difficultly deciding which path to take. Perhaps someone can help, I
think its primarily a design question.
A Spec consists of many Nests and many Parts. Nests contain Parts.
Here''s what I have, which works well currently:
---------------------------------------------------
class Spec <<
2010 May 01
0
Add custom root option to AR JSON Serializer
Hi,
In short: I can do following:
user.to_xml(:root => "xml_user" )
But not following:
user.to_json(:root => "json_user")
JSON serializer for AR doesn''t allow us to specify "root" option unlike XML
serializer. JSON serializer always uses model name as the root if class
attribute include_root_in_json is set to true.
I''ve added a patch which
2010 Apr 09
0
[PATCH] add :root option to ActiveModel JSON serialization
This is a small, straightforward patch that I''d love to see merged:
https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/4358-patch-add-root-option-to-activemodel-json-serialization
It''s all pretty self-explanatory, it basically just ports a useful
option from to_xml to to_json, making their interfaces more compatible
with each other. Feedback would be greatly
2006 Mar 19
2
Multiple polymorphic belongs_to declarations
I have the following models:
class Card < ActiveRecord::Base
belongs_to :deck
belongs_to :front, :polymorphic => true
belongs_to :back, :polymorphic => true
end
class TextContent < ActiveRecord::Base
has_one :card, :as => :front
has_one :card, :as => :back
end
The conflicting has_one declarations don''t work. What I need is
2008 Jun 12
1
unidirectional belongs_to polymorphic
The setup:
class Location::Base < ActiveRecord::Base
set_table_name :locations
...
end
class Location::Address < Location::Base
...
end
class Location::Airport < Location::Base
...
end
class Person < ActiveRecord::Base
belongs_to :location, :polymorphic => true, :class_name =>
"Location::Base"
...
end
I want a unidirectional belongs_to relationship. That
2006 Jul 31
3
Polymorphic associations and single table inheritance
Running into an interesting problem that at first glance appears to be a
bug in the AR association code. However, it''s explicitly coded this way
so I''m not so sure.
I have some code like this:
class Address < ActiveRecord::Base
belongs_to :addressable, :polymorphic => true
end
class Person < ActiveRecord::Base
has_many :addresses, :as => :addressable,
2007 Jan 19
0
Do transactions fail with polymorphic has_one relationships?
I have an AR::Base descendant with a complex object graph beneath it,
like so:
ArtisanQuoteInput has_one QuoteInput and then QuoteInput has several
objects attached to it. Note that the relationship between
ArtisanQuoteInput and QuoteInput is polymorphic, so the relationship in
A is written
has_one :quote_input, :as => :program_quote_input
If @artisan_quote_input is an instance of
2009 Nov 12
0
Problem with has_many :through, :uniq => true with polymorph
Didn''t have quite enough space to describe it there...basically i''m
having a problem with the :uniq option in my tags.
I''m using acts_as_taggable_on_steroid which adds these associations to
my Resource class:
Resource
has_many :taggings, :as => :taggable, :dependent => :destroy, :include
=> :tag
has_many :tags, :through => :taggings, :uniq => true