It is possible to chain where statements residentials = Residential.where(:is_active => true) residentials = residentials.where(:other_thing => true) if param_was_passed This should work. Make sure this is not the last line in a function call; repeat the residentials variable as the last line in that case. (As per @digger69 comment)
EventMachine 0.12.10 is known to not work under Ruby 1.9.2 on Windows. Please try latest 1.x pre-release versions: gem install eventmachine –pre If you’re using with Thin, latest version of Thin works with it properly. This has been discussed on RubyInstaller group several times.
According to the module Devise::Controllers::Helpers, current_user (together with all other devise helpers) is added to ApplicationController, which means that you can override it in this way: # in application_controller.rb def devise_current_user @devise_current_user ||= warden.authenticate(scope: :user) end def current_user if params[:user_id].blank? devise_current_user else User.find(params[:user_id]) end end
Just for the sake of completeness, even though previous answers already show good enough suggestions. You can utilize Paperclip event handlers instead of Rails callbacks. In this case, size will be recalculated only when image changes. (If you’re using S3 for storage, this can save quite some time) has_attached_file :image, :styles => … after_post_process :save_image_dimensions … Read more
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
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”
I would recommend to use the CSV-library instead: require ‘csv’ CSV.open(‘test.csv’,’w’, :write_headers=> true, :headers => [“numerator”,”denominator”,”calculation”] #< column header ) do|hdr| 1.upto(12){|numerator| 1.upto(12){ |denominator| data_out = [numerator, denominator, numerator/denominator.to_f] hdr << data_out } } end If you can’t use the w option and you really need the a+ (e.g., the data isn’t available all at … Read more
Try this: def foo_list items content_tag :ul do items.collect {|item| concat(content_tag(:li, item))} end end
No, it’s not a bad idea. Many people do it and I couldn’t live without it in large applications. There are two ways of doing it: The first is to just move your models. You will, however, have to tell Rails to load the wayward models (as it won’t know where they are). Something like … Read more
No need to install a gem to get this to work (though metawhere is cool) Customer.joins(:purchases).group(“customers.id”).having(“count(purchases.id) > ?”,0)