how to disable select option in rails?
<%= f.select :action_item_status, action_item_status, {}, {:disabled => true} %>
ruby-on-rails
Rails 3 – How to Create a JSON Object to store in the database
Current versions of rails support json serialisation out of the box. Define your field as a string (or text) in the migration and then: class Foo < ActiveRecord::Base serialize :field, JSON end bar = Foo.new bar.field = [1,2,3] bar.save
RSpec send_file testing
From Googling around, it appears that render will also be called at some point .. but with no template, will cause an error. The solution seems to be to stub it out as well: controller.stub!(:render)
How to set custom user-agent for Mechanize in Rails
You can set the user agent from an alias a = Mechanize.new a.user_agent_alias=”Mac Safari” Available aliases are stored in the AGENT_ALIASES constant. p Mechanize::AGENT_ALIASES Otherwise, use #user_agent to set your custom user agent. a = Mechanize.new a.user_agent=”Custom agent”
Kaminari & Rails pagination – undefined method `current_page’
Try with: def show @topic = Topic.find(params[:id]) @posts = @topic.posts.page(params[:page]).per(2) end And then: <%= paginate @posts %>
How to specify a read timeout for a Net::HTTP::Post.new request in Ruby 2
Solved via this stackoverflow answer I’ve changed my response = Net::HTTP.start(url.host, url.port) {|http| http.request(request)} line to be response = Net::HTTP.start(url.host, url.port, :read_timeout => 500) {|http| http.request(request)} and this seems to have got around this problem.
Loop & output content_tags within content_tag in helper
Try this: def foo_list items content_tag :ul do items.collect {|item| concat(content_tag(:li, item))} end end
Using HMAC SHA256 in Ruby
According to the documentation OpenSSL::HMAC.digest Returns the authentication code an instance represents as a binary string. If you have a problem using that maybe you need a hex encoded form provided by OpenSSL::HMAC.hexdigest Example key = ‘key’ data=”The quick brown fox jumps over the lazy dog” digest = OpenSSL::Digest.new(‘sha256’) OpenSSL::HMAC.digest(digest, key, data) #=> “\xF7\xBC\x83\xF40S\x84$\xB12\x98\xE6\xAAo\xB1C\xEFMY\xA1IF\x17Y\x97G\x9D\xBC-\x1A<\xD8” OpenSSL::HMAC.hexdigest(digest, … Read more
Contact us functionality in Rails 3
This tutorial is an excellent example – and it’s Rails 3 Update: This article is a better example than the one I posted earlier, works flawlessly Second Update: I would also recommend merging-in some of the techniques outlined in this railscast on the active_attr gem, where Ryan Bates walks you through the process of setting … Read more
Rails force models to eager load
Well, after some digging, it actually is really simple. Just need to run the following. Rails.application.eager_load!