I have a rake task that won’t work unless a table exists. I’m working with more than 20 engineers on a website so I want to make sure they have migrated the table before they can do a rake task which will populate that respective table. Does AR have a method such as Table.exists? How … Read more
Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create? 3 Answers 3
Here is a piece of code I’m using now: <%= f.select :project_id, @project_select %> How to modify it to make its default value equal to to params[:pid] when page is loaded? 15 Answers 15
How can I change my Rails application to run in production mode? Is there a config file, environment.rb for example, to do that? 15 Answers 15
I recently upgraded to OSX 10.7, at which point my rails installation completely borked when trying to connect to the psql server. When I do it from the command line using psql -U postgres it works totally fine, but when I try to run the rails server or console with the same username and password, … Read more
I’m getting this error: rake aborted! Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs, I have already spent more hours searching google then I am willing to admit. I believe this is an execJs bug. From all the posts, this is a very common issue with rails 3.1. A js runtime is now needed by … Read more
I have a page that lists all of the projects that has sortable headers and pagination. path: /projects?order=asc&page=3&sort=code I choose to edit one of the projects path: projects/436/edit When I click save on that page, it calls the projects controller / update method. After I update the code I want to redirect to the path … Read more
How do you do an OR query in Rails 3 ActiveRecord. All the examples I find just have AND queries. Edit: OR method is available since Rails 5. See ActiveRecord::QueryMethods 14 Answers 14
I am using Ruby on Rails 3.2.2 and I would like to know if the following is a “proper”https://stackoverflow.com/”correct”https://stackoverflow.com/”sure” way to override a setter method for a my class attribute. attr_accessible :attribute_name def attribute_name=(value) … # Some custom operation. self[:attribute_name] = value end The above code seems to work as expected. However, I would like … Read more
I’m using an IF statement in Ruby on Rails to try and test if request parameters are set. Regardless of whether or not both parameters are set, the first part of the following if block gets triggered. How can I make this part ONLY get triggered if both params[:one] and params[:two] is set? if (defined? … Read more
