ruby-on-rails-3.1

I have two Ruby on Rails DateTime objects. How to find the number of months between them? (Keeping in mind they might belong to different years) Massimiliano Peluso (date2.year * 12 + date2.month) - (date1.year * 12 + date1.month) more info at http://www.ruby-forum.com/topic/72120 A more accurate answer would consider days in the distance. For example, if you consider that the month-distance from 28/4/2000 and 1/5/2000 is 0 rather than 1 , then you can use: (date2.year - date1.year) * 12 + date2.month - date1.month - (date2.day >= date1.day ? 0 : 1) Give a try to ((date2.to_time - date1.to

How can i override current_user of devise gem. Actually I need to add web services for mobile-app. Currently devise is managing session and 'current_user' for web-application. Now Mobile app will send user_id to the server. I need to override current user like this def current_user if params[:user_id].blank? current_user else User.find(params[:user_id]) end end Should I need to modify devise gem as plugin ? or something else ? Kindly explain in detail as I am new in rails. Kind regards, According to the module Devise::Controllers::Helpers , current_user (together with all other devise helpers)

Is there an easy way (i.e. a configuration) to force ActiveRecord to save empty strings as NULL in the DB (if the column allows)? The reason for this is that if you have a NULLable string column in the DB without a default value, new records that do not set this value will contain NULL, whereas new records that set this value to the empty string will not be NULL, leading to inconsistencies in the database that I'd like to avoid. Right now I'm doing stuff like this in my models: before_save :set_nil def set_nil [:foo, :bar].each do |att| self[att] = nil if self[att].blank? end end which works

After I added Sprockets, Rails is loading very slow in development mode, what should I do to speed it up? Take a look at https://github.com/wavii/rails-dev-tweaks . Rails is running all of the to_prepare hooks on every Sprockets asset request in development mode. This includes things like auto-(re)loading your code, and various gems sneak work in there too. rails-dev-tweaks disables to_prepare & reloading on any asset request (and a few others - read the first part of its README ). Speeds up your dev environment by a huge amount for any decently sized project. It's also configurable to do this

Question: when do I need to use self in my models in Rails? I have a set method in one of my models. class SomeData < ActiveRecord::Base def set_active_flag(val) self.active_flag = val self.save! end end When I do this, everything works fine. However, when I do this: class SomeData < ActiveRecord::Base def set_active_flag(val) active_flag = val save! end end The active_flag value doesn't change, rather it fails silently. Can someone explain? I can't find any duplicates, but if someone finds one that's fine too. DVG When you're doing an action on the instance that's calling the method, you use

I have a form that is using form_tag and not sure how to use it with the simple_form gem . This is how my form looks: <%= form_tag create_multiple_prices_path, :method => :post do %> <% @prices.each_with_index do |price, index| %> <%= fields_for "prices[#{index}]", price do |up| %> <%= render "fields", :f => up %> <% end %> <% end %> <%= submit_tag "Done" %> <% end %> Can it be done? How would a form_tag change to use simple_form correctly? What about when using it with fields_for ? A Newbie could use some help. Thank you. simple_form is a wrapper around form_for , not form_tag . You can use

Having a hard time figuring out how to make SASS, not SCSS, as the default for stylesheets. I've tried making a sass_config.rb file with this: Sass::Plugin.options[:syntax] = :sass Sass::Plugin.options[:style] = :compressed I've also tried adding that to the environment.rb file. Either way I get this error: .../config/environment.rb:7:in `<top (required)>': uninitialized constant Sass::Plugin (NameError) For rails 3.1.rc4, you could set the config: config.sass.preferred_syntax = :sass in the application.rb file I added the following to config/environments/development.rb : config.sass.preferred