Hi,
Suppose I have a table with the following columns (a list of words):
word: varchar
contributor: integer (FK)
Now, suppose I wanted to have translations for each "word". What would be best? Having a second table?
word: integer (FK)
translation: varchar
contributor: integer (FK)
lang: integer (FK)
Or all in the same table?
word...
I have just started investigating using more advanced models in Rails. One that I use regularly, with great success, is model where a many-to-many cross-reference relationship is accessed by a class that itself is a sub-class of the base class in the many-to-many relationship.
This way the cross-reference class can act as a stand-in for...
I am using Single-Table Inheritance (STI) on one of my models for a Rails App and I am having problems storing model objects on a constant. I have isolated the problem into a sample project and submitted it to GitHub: http://github.com/fcoury/rails-sti-caching
What I am trying to do is loading a model instance (in this case a Music mode...
I've just been reading Chad Fowler's blog post about 20 Rails Development No-Nos. On Single Table Inheritance he comments:
The storage of a column called “type” which holds a class name is a pretty good indicator that something fishy is going on. It’s fishy but not always bad. I think, though, that any time you use it you should ask ...
hi all
I have a product model that has many sections and a section can belong to many products.
The section model has subclasses as features, standardAccessories and OptionalAccessories in a STI. Each having field title, body, image url and (optionalAccessories) has price.
my models are
class Product < ActiveRecord::Base
has_and...
I've been reading up on a bit of STI Inheritence examples for Rails,
While it looks like it would suit my needs (User role/types inheriting from a base class of user). It seems like it doesn't handle a user having multiple roles too well. Particularly because it relies on a type field in the database.
Is there a quick and easy work arou...
Trying to implement a search logic search that uses associations with STI but I’m having a problem where it is not select the STI records as the subclass but the parent.
Example:
class Users
end
class Artist < User
has many :agents, :through => :agents artists
end
class Agent < User
has many :artists, :through => :agents artists...
Consider:
class Person < ActiveRecord::Base
class << self
def setup
has_one :address, :as => :addressable
end
end
end
class Employee < Person
setup
end
class Address < ActiveRecord::Base
belongs_to :addressable, :polymorphic => true
end
# Shouldn't this be 'Employee'? Is it possible to override?
Employee.create....
I am using Single Table Inheritance for managing different types of projects.
Models:
class Project < ActiveRecord::Base
end
class SiteDesign < Project
end
class TechDesign < Project
end
Edit action from projects_controller:
def edit
@project = Project.find(params[:id])
end
View edit.html.erb:
<% form_for(@project, :url => {...
I'm trying to setup single table inheritance in my Rails app for a User model and its subclasses Member, Subscriber, and Staff.
I have a model file for each: user.rb, member.rb, etc
The user model is defined: class User < ActiveRecord::Base; end;
I subclassed the other models as such: class Member < User; end; and so on.
In my users t...
I have a couple of models in my system:
User Reputation
Post Reputation
Response Reputation
(similar to SO).
So, they are share some basic code:
Incrementing and decrementing values
a unique_id belonging to the three object that the reputation represents (User, Post, Response)
If there were C++, I would have a superclass ...
I have problem with STI and relationship in ActiveRecord. I think I missed something in the class methods, but I don't know for sure. Below is my models:
class User < ActiveRecord::Base
has_many :advertisements
end
class Advertisement < ActiveRecord::Base
belongs_to :user
end
class FreeAdvertisement < Advertisement
end
class Paid...
I want to have these models:
AbstractArticle
Article < AbstractArticle
FeaturedArticle < AbstractArticle
I want the name of the database table to be articles and not abstract_articles. (As the convention suggests)
Is this possible with Rails? How can I tell my base model to use a different table? Will STI still work even though the ...
app/models
class Amodel < ActiveRecord::Base
end
class Bmodel < Amodel
end
class Cmodel < Bmodel
end
db/migrate
create_table :amodels do |t|
t.string :type
end
on script/console...
$ script/console
Loading development environment (Rails 2.3.4)
>> Cmodel.create
=> #<Cmodel id: 1, type: "Cmodel">
>> Bmodel.find(:all)
=> [#<...
Hi, I've got something like this
class Reply < AR::Base
end
class VideoReply < Reply
def hello
p 'not ok'
end
end
class PostReply < Reply
def hello
p 'ok'
end
end
...
So when I am creating object:
# params[:reply][:type] = "VideoReply"
@reply = Reply.new(params[:reply])
How can I invoke child method (in this case...
I am working on a very large Rails application. We initially did not use much inheritance, but we have had some eye opening experiences from a consultant and are looking to refactor some of our models.
We have the following pattern a lot in our application:
class Project << ActiveRecord::Base
has_many :graph_settings
end
class Graph...
OK, so I've been toying with different ways of organizing my Rails 3 apps regarding STI and Polymorphic Associations. I was trying to find a way that is both easy to code, and easy to use, and has the highest chance of being the most compatible with any future changes. After alot of reading a lot of optionated (and often lacking and po...
I want to store two models using active record, but delete doesn't work as expected.
Evaluation has id, name and description
and SqlEvaluation has additional two columns of query_string and database.
I want to use those two tables, and eval_typ_id is used to distinguish which subclass should be used: 1 for SqlEvaluation.
create tabl...