ActiveRecord has a few different callback methods used to simplify model logic. For example after_find and before_create methods. Consider this code example: class ExternalPrintingCard < ActiveRecord::Base belongs_to :user belongs_to :ph_user after_create :change_pin def change_pin self.user.randomize_printer_pin end ...
Let's say I have a model called Theme, which has several attributes setting interface colors. Theme also has a Paperclip attachment, which is a user-generated CSS template. I want to set up a processor to generate a final CSS file, inserting the interface colors into the user-generated template. To do this, I need to access the model dat...
I nave this pice of code in index.html (upload controller) This an example. <p> <label for="picture_city">City:</label> <%= form.select :city, Picture::CITIES, :onchange => remote_function(:url => {:action => 'update_universities'}, :with => '') %> </p> When i go to upload/index the form loads well and no errors. But when i see g...
Unluckily I can't get this relative simple stuff to work.... :-( models: class User < ActiveRecord::Base belongs_to :role, :polymorphic => true class Admin < ActiveRecord::Base has_one :user, :as => :role class Dealer < ActiveRecord::Base has_one :user, :as => :role class Buyer < ActiveRecord::Base has_one :user, :as => :rol...
As a developer new to Rails, I'd like to know what checklists seasoned Rails developers might have of things to check before putting a Ruby on Rails web site live. I am thinking that you should probably remove generated views that you aren't using, remove controller actions you don't need, remove default routes and so forth. I'm thin...
I want to set my summary field to a sanitized version of the body field, but only if the user does not supply their own summary ie. params[:document][:summary] is blank. This appears to work fine if I create a new record, if I enter a summary it is saved, if I don't the body is used to generate the summary. However when I update the re...
Hi, I have numerous statements like these in both my create and update action of my controller: @company.set_preference(:api_username, params[:company]['api_username']) if params[:company]['api_username'] @company.set_preference(:api_password, params[:company]['api_password']) if params[:company]['api_password'] I'm wondering if how ...
Hi, I'm using paperclip by thoughtbot for attachments to models and everything works fine on my development machine running mac os x and mongrel. However when I deploy may app to a debian machine running apache/mod_rails (2.2.5) I can't get it started. I get 'undefined method has_attached_file' (or 'uninitialized constant Paperclip' usi...
I'm trying to write a Rails controller method that will respond to get requests made both "normally" (e.g. following a link) and via ajax. Normal Case: The controller should respond with fully decorated HTML using the layout. Ajax Case: The conroller should respond with the HTML snippet generated by the template (no layout) Here's the...
If my Rails application has the database pool size set to 5 (the default) in my database.yml file, and I'm running using Phusion Passenger, does that mean that there may be up to 5 database connections for each process that Passenger spawns, or is it 5 total across all processes? ...
I have a Rails model that should only allow saving/updating of a model once per day per user. I have a callback to do the Find by user and date then add to errors but this is ugly and feels un-rails-like. I have the typical created_at / updated_at columns (and the time portion is significant/I need to keep it). So I figure I could eithe...
Is there an open source equivalent to FiveRun's Tuneup product for Ruby on Rails performance measurments? ...
The code below is working but I want to know if there is a better way to do it. Is this the correct RESTful way to do this? Any suggestions would be helpful. The basic requirement is that I need a way to create and destroy a membership from places/show.html.erb class Place < ActiveRecord::Base has_many :memberships has_many :members...
I am currently setting up a master-slave app using Ruby on Rails that needs to have a Master-Slave backend. I'm currently looking at using Slony for the replication component, and Masochism for handling the read/write connections to the different DBs. This is my first time setting up master-slave DBs with Ruby on Rails, and these are t...
Would appreciate any recommendations as a lot of skeleton apps I see are out of date. ...
I am still kind of fuzzy on controllers in rails, especially so because a lot of things seem to happen magically behind the scenes, and that's not happening in this case. So say I have a person model, which has many photos (using paperclip) and has many favorite quotes. The quotes can have the text, the attributed author, etc. In both o...
Looking for a Smalltalk compiler that given Smalltalk (Instantiations) will emit either Java bytecode, .NET CLR or Ruby. Not looking for porting utilities as I want to leave the application in Smalltalk. I have googled for solutions and ran across a company who had a website (http://www.smalltalkmigrations.com/) but it seems as if they ...
Hello This is my very first question in stack overflow and I am quite excited. Liked a lot the interface of this site and the buoyant community! I am building a rails app that receives text as an email and creates a post. I ask or your expert opinion on which is the best option to receive the mail message and process it? To send the ...
Hi Do I need to encode strings (eg URL) I pass as a POST form parameter? Ie I want to pass a URL I have to my web application (ruby on rails) as one of the form parameters. So are there any potential characters in a URL/URI that would need to be encoded? Or perhaps rails would handle this anyway? ...
Let's say I have this: <%= link_to "My Big Link", page_path(:id => 4) %> And in my page.rb I want to show urls by their permalink so I use the standard: def to_param "#{id}-#{title.parameterize}" end Now when I click "My Big Link" it takes me to the correct page, but the url in the address bar does not display the desired pe...