Difference between revisions of "Ruby on Rails"
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| − | + | ==Tutorials== | |
Beginner's tutorial<br> | Beginner's tutorial<br> | ||
http://allaboutruby.wordpress.com/2006/01/09/installing-rails-on-windows-step-by-step-tutorial/<br> | http://allaboutruby.wordpress.com/2006/01/09/installing-rails-on-windows-step-by-step-tutorial/<br> | ||
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http://www.ruby-lang.org/en/documentation/quickstart/<br> | http://www.ruby-lang.org/en/documentation/quickstart/<br> | ||
| − | + | ==nil?, empty? and blank?== | |
| − | <pre> | + | <pre class="brush:ruby"> |
.nil? can be used on any object and is true if the object is nil. | .nil? can be used on any object and is true if the object is nil. | ||
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<h3>How to skip active record in rails 3</h3> | <h3>How to skip active record in rails 3</h3> | ||
1. Create new rails project with | 1. Create new rails project with | ||
| − | <pre> | + | <pre class="brush:ruby"> |
rails new myApp --skip-activerecord | rails new myApp --skip-activerecord | ||
</pre> | </pre> | ||
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In application.rb, remove the require 'rails/all' line and instead add these lines: | In application.rb, remove the require 'rails/all' line and instead add these lines: | ||
| − | <pre> | + | <pre class="brush:ruby"> |
require "action_controller/railtie" | require "action_controller/railtie" | ||
require "action_mailer/railtie" | require "action_mailer/railtie" | ||
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You'll also need to remove/comment out this line in application.rb | You'll also need to remove/comment out this line in application.rb | ||
| − | <pre> | + | <pre class="brush:ruby"> |
config.active_record.whitelist_attributes = true | config.active_record.whitelist_attributes = true | ||
</pre> | </pre> | ||
And remove/comment these two lines from development.rb | And remove/comment these two lines from development.rb | ||
| − | <pre> | + | <pre class="brush:ruby"> |
config.active_record.mass_assignment_sanitizer = :strict | config.active_record.mass_assignment_sanitizer = :strict | ||
config.active_record.auto_explain_threshold_in_seconds = 0.5 | config.active_record.auto_explain_threshold_in_seconds = 0.5 | ||
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In config/environment.rb add (or uncomment) the line | In config/environment.rb add (or uncomment) the line | ||
| − | <pre> | + | <pre class="brush:ruby"> |
config.frameworks -= [ :active_record, :active_resource, :action_mailer ] | config.frameworks -= [ :active_record, :active_resource, :action_mailer ] | ||
</pre> | </pre> | ||
This will cause Rails not to use those frameworks. (Note the nearly-invisible -= !) | This will cause Rails not to use those frameworks. (Note the nearly-invisible -= !) | ||
Latest revision as of 00:20, 20 February 2015
Tutorials
Beginner's tutorial
http://allaboutruby.wordpress.com/2006/01/09/installing-rails-on-windows-step-by-step-tutorial/
Ruby in 20 minutes
http://www.ruby-lang.org/en/documentation/quickstart/
nil?, empty? and blank?
.nil? can be used on any object and is true if the object is nil.
.empty? can be used on strings, arrays and hashes and returns true if:
String length == 0
Array length == 0
Hash length == 0
Running .empty? on something that is nil will throw a NoMethodError.
.blank? will operate on any object
nil.blank? == true
false.blank? == true
[].blank? == true
{}.blank? == true
"".blank? == true
5.blank? == false
" ".blank? == true
" ".empty? == false
How to skip active record in rails 3
1. Create new rails project with
rails new myApp --skip-activerecord
2.
In application.rb, remove the require 'rails/all' line and instead add these lines:
require "action_controller/railtie" require "action_mailer/railtie" require "active_resource/railtie" require "rails/test_unit/railtie" require "sprockets/railtie"
Also see Remove ActiveRecord in Rails 3 and look into the Active Model railscast
Rails 3.2.x:
You'll also need to remove/comment out this line in application.rb
config.active_record.whitelist_attributes = true
And remove/comment these two lines from development.rb
config.active_record.mass_assignment_sanitizer = :strict config.active_record.auto_explain_threshold_in_seconds = 0.5
Rails 2.x:
In config/environment.rb add (or uncomment) the line
config.frameworks -= [ :active_record, :active_resource, :action_mailer ]
This will cause Rails not to use those frameworks. (Note the nearly-invisible -= !)
