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Active Record Associations — Ruby on Rails Guides 
 
guides.rubyonrails.org/association_basics.html
1 Why Associations? Why do we need associations between models? Because they make common operations simpler and easier in your code. For example, consider a simple Rails application that includes a model for customers and a model for orders.  
 
 
 
ActiveRecord::Associations::ClassMethods - Ruby on Rails 
 
api.rubyonrails.org/classes/ActiveRecord/Associations/...
Associations are a set of macro-like class methods for tying objects together through foreign keys. They express relationships like “Project has one Project Manager” or “Project belongs to a Portfolio”.  
 
 
 
Rails Associations - Stack Overflow 
 
stackoverflow.com/questions/1414214/rails-associations
I can't seem to wrap my mind around Rails associations. Let's say I have 3 tables. One for Users, one for Recipes, and one for Ingredients. Here's an example of the database (in yaml): Users: id...  
 
 
 
Ruby on Rails Guides: A Guide to Active Record Associations 
 
guides.rubyonrails.org/v3.2.13/association_basics.html
1 Why Associations? Why do we need associations between models? Because they make common operations simpler and easier in your code. For example, consider a simple Rails application that includes a model for customers and a model for orders.  
 
 
 
associations - rails has_one scaffold - Stack Overflow 
 
stackoverflow.com/questions/7988969/rails-has-one-scaffold
I have two models linked together with a belongs_to and a has_one association, but I can add more than one record to the database since I have generated that model through scaffold generation. My c...  
 
 
 
Associations in Rails - SlideShare 
 
www.slideshare.net/JamesEdwardGrayII/associations-in-rails
Transcript. 1. Associations Modeling database relationships with ActiveRecord 2. Database Modeling The “relational” in relational database  
 
 
 
Validating Nested Associations in Rails - Home on Rails 
 
homeonrails.com/2012/10/validating-nested-associations...
Intro Rails provide a wide range of options for creating rich forms for your models. This can be a simple form for one object, or the form for many …  
 
 
 
Learn Ruby on Rails -- Active Record Associations 
 
www.theodinproject.com/ruby-on-rails/...record-associations
Advanced Active Record Associations Introduction. You've already had some familiarity with associations, especially the basic has_one, has_many, and belongs_to variety.  
 
 
 
ActiveRecord::Associations::CollectionProxy - Ruby on Rails API 
 
api.rubyonrails.org/classes/ActiveRecord/Associations/...
Association proxies in Active Record are middlemen between the object that holds the association, known as the @owner, and the actual associated object, known as the @target.  
 
 
 
Understanding Polymorphic Associations in Rails 
 
www.gotealeaf.com/blog/...polymorphic-associations-in-rails
How to use Polymorphic Associations in a Rails app. Examples to show the differences between Polymorphic Associations and Single Table Inheritance ( …  
 
 
 
What's the Deal with Rails' Polymorphic Associations? 
 
https://robots.thoughtbot.com/whats-the-deal-with-rails...
The latest big ActiveRecord feature to Rails has been polymorphic associations. Not very clear at first, I found out they’re easier to understand with a couple examples.  
 
 
 
Creating model associations in Rails | Andrew den Hertog 
 
www.andrewdenhertog.com/...on-rails/...associations-in-rails...
Model associations are an extremely important part of a rails app that identify how models interact with each other and the relationships between them.  
 
 
 
has_many (ActiveRecord::Associations::ClassMethods) - APIdock 
 
apidock.com/rails/.../Associations/ClassMethods/has_many
Ruby on Rails latest stable (v4.1.8) - 9 notes - Class: ActiveRecord::Associations::ClassMethods. 1.0.0 (0) 1.1.1 (38) 1.1.6 (0) 1.2.0 (6) ... Only use it if the name cannot be inferred from the association. has_many:subscribers, through: : ...  
 
 
 
2015 Rail Conference - American Public Transportation Association 
 
www.apta.com/mc/rail/Pages/default.aspx
The 2015 Rail Conference is scheduled for June 21-24, 2015, at the Grand America Hotel, 555 S. Main Street, Salt Lake City, UT. About This Conference  
 
 
 
ASLRRA - American Short Line & Regional Railroad Association 
 
www.aslrra.org
The American Short Line and Regional Railroad Association (ASLRRA) is a non-profit trade association that represents the interests of its more than 475 short line and regional railroad members in legislative and regulatory matters.    
 
 
Using indexes in rails: Index your associations · tomafro.net 
 
https://tomafro.net/2009/08/using-indexes-in-rails-index...
Many rails developers are great at building applications but have limited experience in database design. As a consequence, projects often have half-baked indexing strategies, and as a result suffer bad performance.  
 
 
 
National Association of Rail Shippers - North American ... 
 
railshippers.com
The National Association of Rail Shippers is the national umbrella organization that links six regional association of rail owners, vendors and users.    
 
 
The North East Association of Rail Shippers - NEARS 
 
https://www.nears.org
North East Association of Rail Shippers is headquartered in the Boston area. NEARS is one of 5 regional organizations under the umbrella of the NARS.    
 
 
NARP is a Member of These Rail Product Associations 
 
www.narailproducts.com/associations
North American Rail Products proudly aligns ourselves with various associations in the rail industry to display our credibility and reputation in the railway business.  
 
 
 
National Association of Railroad Passengers | Washington, DC ... 
 
www.narprail.org
The mission of the National Association of Railroad Passengers (NARP) is to work for a modern, customer-focused national passenger train network that provides a travel choice Americans want.    
 
 
has_one (ActiveRecord::Associations::ClassMethods) - APIdock 
 
apidock.com/rails/.../Associations/ClassMethods/has_one
build_association deletes existing dependent record. Surprisingly (at least I was surprised), when an associated record exists, the build_association method immediately NULLs the foreign key in the database.  
 
 
 
Southwest Association of Rail Shippers 
 
swrailshippers.com
The Southwest Association of Rail Shippers territory includes the Republic of Mexico and the states of Arizona, Arkansas, Southern California (from and including Fresno and points South thereof), Colorado, Kansas, New Mexico, Oklahoma, Texas and Utah.    
 
 
Ruby on Rails 
 
rubyonrails.org
“Ruby on Rails is a breakthrough in lowering the barriers of entry to programming. Powerful web applications that formerly might have taken weeks or months    
 
 
Industry Associations | Rail News 
 
www.railresource.com/content/?page_id=10
A: The Air Brake Association, Inc. Sandy, UT: www.airbrakeassociation.org: American Assoc. of Private Railroad Car Owners, Inc. Washington, DC: www.aaprco.com  
 
 
 
Midwest Association of Rail Shippers Elects 2015 Officers ... 
 
www.jamesstreetassoc.com/news/midwest-association-rail...
OAK BROOK, IL—March 18, 2015 (James Street Media Services)—The Midwest Association of Rail Shippers (MARS) elected its 2015 slate of officers at the annual winter meeting in January. The 2015 MARS officers are: President: George Macko, president, SCO-Pro, LLC, Naperville, Illinois  
 
 
 
National Model Railroad Association 
 
nmra.org
Welcome to the National Model Railroad Association. The National Model Railroad Association, Inc. advances the global scale model railroading community through education, advocacy, standards, and social interaction. Initiative Spotlight    
 
 
RAILS | Reaching Across Illinois Library System 
 
www.railslibraries.info
Management Association Benefits; Links/Resources; Continuing Education. Library Learning (L2) Calendar; CE Archives; CE Announcements; LYRASIS Benefits; ... RAILS web news (including this blog) RSS feed. Latest from RAILS. Nominations Open for RAILS Board.    
 
 
#154 Polymorphic Association - Ruby on Rails Screencasts ... 
 
railscasts.com/episodes/154-polymorphic-association
Short Ruby on Rails screencasts containing tips, tricks and tutorials. Great for both novice and experienced web developers.  
 
 
 
Rail Organizations - TrainWeb.org 
 
www.trainweb.org/amtrak/orgs.html
Rail Organizations www.trainweb.org/amtrak/orgs.html Organizations related to rail and rail travel advocacy associations. Click here for links to Amtrak web sites.    
 
 
Associations in Rails 
 
de.slideshare.net/JamesEdwardGrayII/associations-in-rails
This was the sixth speech of a three day Rails training I gave in Tulsa, OK in the spring 2010.  
 
 
 
has_many :through - Basic Rails association cardinality 
 
blog.hasmanythrough.com/...rails-association-cardinality
Over the weekend I noticed that the Rails API docs didn't have any basic information on relation cardinality and how that maps to associations.  
 
 
 
Pacific Northwest Association of Rail Shippers 
 
pnrailshippers.com
The Pacific Northwest Association of Rail Shippers is headquartered in West Linn, Oregon. General membership comes from the provinces of Alberta and British Columbia and the states of Northern California ...    
 
 
Basic many-to-many Associations in Rails | Kansas City on Rails 
 
kconrails.com/2010/...to_many-associations-in-ruby-on-rails
10 Responses to “Basic many-to-many Associations in Rails” fo Says: March 22, 2010 at 6:00 pm | Reply. You might probably want to add that a conversion between these two models of crafting the relationship is really not a great deal with migrations.  
 
 
 
Rails - Fortis Manufacturing 
 
fortismfg.com/index.php?route=product/category&path=59
Rails. Refine Search. REV™ II Series; REV™ Series; SWITCH™ Series; Information About Us Shipping Information Delivery Information Privacy Policy Terms & Conditions Customer Service Contact Us ... Fortis Manufacturing © 2015 ...  
 
 
 
Ruby on Rails 3 Model Association | Jonathan Hui 
 
www.jonathanhui.com/ruby-rails-3-model-association
Rails 3 Model Association tutorial covers the 1-to-many, many-to-1 and many-to-many association. It describes scoping, the lazy and eager loading strategy, association options & polymorphic.  
 
 
 
#163 Self-Referential Association - RailsCasts 
 
railscasts.com/episodes/163-self-referential-association
Short Ruby on Rails screencasts containing tips, tricks and tutorials. Great for both novice and experienced web developers. ... Creating a social networking site often requires a self-referential association on the User model to define friends/followers.  
 
 
 
Getting Started with Rails — Ruby on Rails Guides 
 
edgeguides.rubyonrails.org/getting_started.html
Getting Started with Rails. This guide covers getting up and running with Ruby on Rails. After reading this guide, you will know: How to install Rails, create a new Rails application, and connect your application to a database.  
 
 
 
Northeast Association of Rail Shippers 
 
nerailshippers.com
The North East Association of Rail Shippers is headquartered in the Boston area.    
 
 
Association of State Rail Safety Program Managers 
 
www.railsafety.idaho.gov
ASSOCIATION OF STATE RAIL SAFETY MANAGERS. Program Summary; Articles of Association; Executive Committee; Contact List; Crude by Rail State Links    
 
 
Southeast Association of Rail Shippers (SEARS) 2015 Spring ... 
 
serailshippers.com/sears_pdfs/Savannah_Agenda_for...
Page 2 Southeast Association of Rail Shippers (SEARS) 2015 Spring Meeting Agenda March 24 – 26, 2015 Wednesday, March 25, 2015 10:00 a.m. Refreshment Break  
 
 
 
Association of Community Rail Partnerships - Acorp Homepage 
 
www.acorp.uk.com
A federation of community rail partnerships and rail promotion groups. Information about members, projects, conferences, publications, policies, and contacts.    
 
 
has_many :through 
 
blog.hasmanythrough.com
It's Rails 3.2 day! ... Self-referential has_many :through associations; Many-to-many Dance-off! Ruby sweetness; Why aren't join models proxy collections? Missing out on Canada on Rails; Ruby Meetup; My first Ruby on Rails patch; Getting Real redux;    
 
 
Texas Association of Rail Passengers (TXARP) 
 
www.txarp.org
All Aboard! Campaign by Texas Rail Advocates, TxARP, NARP, Texas Eagle and Lone Star Rail District to promote passenger rail in Texas. More details here.    
 
 
Railroad Products and Services Directory, Railroad Contacts ... 
 
www.railresource.com
Railresource contains railroad industry information, news and contact information for freight railroads in North America - powered by The Pocket List of Railroad Officials. Includes information on supply companies with details on the types of products and services they offer the rail industry.    
 
 
rails-api/active_model_serializers · GitHub 
 
https://github.com/rails-api/active_model_serializers
active_model_serializers - ActiveModel::Serializer implementation and Rails hooks. active_model_serializers - ActiveModel::Serializer implementation and Rails hooks. Skip to content. ... Overriding association methods. If you want to override any association, you can use:  
 
 
 
AREMA - American Railway Engineering and Maintenance-of-Way ... 
 
arema.org
The AREMA website is best viewed with the following modern web browsers: ... American Railway Engineering and Maintenance-of-Way Association 4501 Forbes Blvd., Suite 130 - Lanham, Maryland 20706 - T: +1.301.459.3200 ... AREMA High Speed Rail Policy;    
 
 
Ruby on Rails/ActiveRecord/Associations - Wikibooks, open ... 
 
en.wikibooks.org/.../Ruby_on_Rails/ActiveRecord/Associations...
Associations Introduction . Associations are methods to connect 2 models. Operations on objects become quite simple. The association describes the role of relations that models are having with each other.  
 
 
 
Michigan Association of Railroad Passengers 
 
www.marp.org
The Latest. New policy worries states supporting short Amtrak routes March 15, 2015; Here’s where to look for updates on the M-1 Rail project in Detroit March 15, 2015    
 
 
Rails Active Records - Models - Tutorials for SIP, Pay per ... 
 
www.tutorialspoint.com/ruby-on-rails/rails-active...
Creating associations between models: When you have more than one model in your rails application, you would need to create connection between those models.  
 
 
 
Association - Rail Nation Wiki 
 
rail-nation.wikia.com/wiki/Association
In an association, you can join forces with other players and benefit from mutual advantages. Investments of other association members into an industry will also reduce your own waiting time.  
 
 
 


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