Rails – controller action name to string
Rails 2.X: @controller.action_name Rails 3.1.X: controller.action_name, action_name Rails 4.X: action_name
ruby-on-rails
belongs_to through associations
You can also delegate: class Company < ActiveRecord::Base has_many :employees has_many :dogs, :through => :employees end class Employee < ActiveRescord::Base belongs_to :company has_many :dogs end class Dog < ActiveRecord::Base belongs_to :employee delegate :company, :to => :employee, :allow_nil => true end
EOFError: end of file reached issue with Net::HTTP
If the URL is using https instead of http, you need to add the following line: parsed_url = URI.parse(url) http = Net::HTTP.new(parsed_url.host, parsed_url.port) http.use_ssl = true Note the additional http.use_ssl = true. And the more appropriate code which would handle both http and https will be similar to the following one. url = URI.parse(domain) req … Read more
Rails 3: I want to list all paths defined in my rails application
rake routes or bundle exec rake routes
Rails Object to hash
If you are looking for only attributes, then you can get them by: @post.attributes Note that this calls ActiveModel::AttributeSet.to_hash every time you invoke it, so if you need to access the hash multiple times you should cache it in a local variable: attribs = @post.attributes
Rails: How to change the title of a page?
In your views do something like this: <% content_for :title, “Title for specific page” %> <!– or –> <h1><%= content_for(:title, “Title for specific page”) %></h1> The following goes in the layout file: <head> <title><%= yield(:title) %></title> <!– Additional header tags here –> </head> <body> <!– If all pages contain a headline tag, it’s preferable to … Read more
Ruby on Rails console is hanging when loading
Restarting Spring should fix the hanging commands: $ bin/spring stop I experienced hanging commands (rake, bin/rails, etc.) after deleting and recreating a new Ruby on Rails application. Google wasn’t that helpful. I hope this is. Spring will start automatically when you re-run your command.
Ignoring time zones altogether in Rails and PostgreSQL
Postgres has two different timestamp data types: timestamp with time zone, short name: timestamptz timestamp without time zone, short name: timestamp timestamptz is the preferred type in the date/time family, literally. It has typispreferred set in pg_type, which can be relevant: Generating time series between two dates in PostgreSQL Internal storage and epoch Internally, timestamps … Read more
The differences between .build, .create, and .create! and when should they be used?
There are a couple differences, but they’re not big: .create is equivalent to .new followed by .save. It’s just more succinct. .create! is equivalent to .new followed by .save! (throws an error if saving fails). It’s also just a wee bit shorter I think .build is mostly an alias for .new. It works one way … Read more
What is the _snowman param in Ruby on Rails 3 forms for?
This parameter was added to forms in order to force Internet Explorer (5, 6, 7 and 8) to encode its parameters as unicode. Specifically, this bug can be triggered if the user switches the browser’s encoding to Latin-1. To understand why a user would decide to do something seemingly so crazy, check out this google … Read more