I have a pretty standard use-case. I have a parent object and a list of child objects. I want to have a tabular form where I can edit all the children at once, as rows in the table. I also want to be able to insert one or more new rows, and on submit have … Read more
This question already has answers here: Determine complete Django url configuration (10 answers) Closed 6 years ago. In rails, on can show the active routes with rake (http://guides.rubyonrails.org/routing.html): $ rake routes users GET /users {:controller=>”users”, :action=>”index”} formatted_users GET /users.:format {:controller=>”users”, :action=>”index”} POST /users {:controller=>”users”, :action=>”create”} POST /users.:format {:controller=>”users”, :action=>”create”} Is there a similar tool/command for … Read more
I am using the rails 4.0 branch of devise along with ruby 2.0.0p0 and Rails 4.0.0.beta1. This is the kind of question where I am checking if I’m doing it the right way, or if there are other things I should be doing. I’m sure a lot of people moving to Rails 4.0 are facing … Read more
I have the following select box in my form: Related Type: <%= f.select(:TYPE, [[‘Type A’, ‘Type A’], [‘Type B’, ‘Type B’], [‘Type C’, ‘Type C’], [‘Type D’, ‘Type D’], [‘Type E’, ‘Type E’] ],{ :prompt => “Please select”} ) %> I want to allow the user to make multiple selections and also make the … Read more
I’m trying to follow instructions from the book “Head First Rails” and on page 50 it says to create a model but I am unable to create a model using the rails command. When I type this at this prompt: localhost:~ home$ rails generate model ad name:string description:text price:decimal seller_id:integer email:string img_url:string I get this: … Read more
I have a small ruby script in which I’d like to use ActiveRecord to easily access a database model. What is the best way to do it? Answer require ‘active_record’ # Change the following to reflect your database settings ActiveRecord::Base.establish_connection( adapter: ‘mysql2’, # or ‘postgresql’ or ‘sqlite3’ or ‘oracle_enhanced’ host: ‘localhost’, database: ‘your_database’, username: ‘your_username’, … Read more
Is there a better way to write this: if myarray.include? ‘val1’ || myarray.include? ‘val2’ || myarray.include? ‘val3’ || myarray.include? ‘val4′ Answer Using set intersections (Array#:&): (myarray & [“val1”, “val2”, “val3”, “val4”]).present? You can also loop (any? will stop at the first occurrence): myarray.any? { |x| [“val1”, “val2”, “val3”, “val4”].include?(x) } That’s ok for small arrays, … Read more
I did some searching found some different methods and posts about creating a deep copy operator. Is there a quick and easy (built-in) way to deep copy objects in Ruby? The fields are not arrays or hashes. Working in Ruby 1.9.2. Answer Deep copy isn’t built into vanilla Ruby, but you can hack it by … Read more
when running a Rails server, I get the following error: no such file to load — openssl I try a solution I find online. I go to ~/.rvm/src/ruby-1.9.2-head/ext/openssl. I type : ruby extconf.rb, but I get the following: === OpenSSL for Ruby configurator === === Checking for system dependent stuff… === checking for t_open() in … Read more
I was trying to run “rails s” to run my server then I suddenly run into an error that says webpacker configuration not found. Here’s the info: boot@noki-K54C:~/Desktop/app$ rails s => Booting Puma => Rails 6.0.0 application starting in development => Run `rails server –help` for more startup options RAILS_ENV=development environment is not defined in … Read more
