Notes

Hello,

I'm brand new to ROR and in general server side programing. I'm a iOS developer who is trying to learn ROR.

I'm trying to use collection select to implement filtering for my page. The idea is there are a bunch of posts and I want to implement record filtering for those.

The first collectio...

Call it in a before filter in your Base or Application Controller.

before_filter :authenticate_through_api_client

def authenticate_through_api_client # this block should return true or false authenticate_or_request_with_http_token |token,other_options| Apiclient.find_by_client_key(token...

where_you_want_it = 0 (begining of stack loaded first) Rails.application.config.middleware.insert_before(where_you_want_it, Module::Class)

= Here is an example to understand described_class If while describing the rspec, we use a Class name in the describe part, we can use described_class method to refer to that and use it as a class in the specs within that description.

Example: describe MyClass do it "is available as describ...

I'm using sub-transaction to update existent records on DB. I use this approach to update the uniqueness field when it value dependent on another existent field without uniqueness restriction.

==== Migration for uniqueness with existent dependent data in DB

class AddUniquenessBarToFoo < Act...

I'm using sub-transaction to update existent records on DB. I use this approach to update the uniqueness field when it value dependent on another existent field without uniqueness restriction.

==== Migration for uniqueness with existent dependent data in DB

class AddUniquenessBarToFoo < Act...

For detailed usage examples of where see "Conditions" under ActiveRecord::Base.

===Redirect 302 get "/accounts", :to => redirect("/", :status => 302)

The list of supported statuses is now in the layout & rendering rails guide:

http://guides.rubyonrails.org/layouts_and_rendering.html#the-status-option

http://www.alexreisner.com/code/form-builders-in-rails

It seems like trap returns nil if the handler was "DEFAULT", but calling trap with nil causes a "IGNORE"

2.0.0-p247 :020 > p trap("CHLD", "DEFAULT")
nil
 => nil 
2.0.0-p247 :021 > p trap("CHLD", nil)
nil
 => nil 

So it seems that once you trap a signal, there isn't a way to...

No problem with new records however,

the following line will not display the current @ecard value on EDIT but '[email protected]'. text_field :ecard, :sender, :value => '[email protected]' Don't let your views take control, but if you insist: text_field :ecard, :sender, :value => f.object.eca...

a note for anoiaque solution...

before running you need to require set

require 'set'
class Array
def included_in? array
  array.to_set.superset(self.to_set)
end
end

[1,2,4].included_in?([1,10,2,34,4]) #=> true

Just for completeness (it should behave like this), comparing ranges that start and end with the same value will overlap, e.g.

(1..5).overlaps?(5..10) # => true

Trying this in the console:

(1.day.from_now..5.days.from_now).overlaps?(5.days.from_now..10.days.from_now)

will blow up...

It's fine with Dates though:

(1.day.from_now.to_date..5.days.from_now.to_date).overlaps?(5.days.from_now.to_date..10.days.from_now.to_date) # => true

Be aware 'John Doe №88'.sqeeze => 'John Doe №8' # with just one '8'

http://apidock.com/rails/ActiveRecord/Relation/update_all

Client.where( country: 'Canada' ).update_all( country_code: 'CA' )

==== Code example <%= f.submit 'Create User', class: 'buttons', :onclick => "validate_user_form_and_submit()" %>

Where you see:

HelperData.new(datetime, options, html_options).select_hour

The correct would be:

HelperDate.new(datetime, options, html_options).select_hour

Class name and class instance must be same name.

Code works fine in Rails 3.2.13.

Typically, you want to increment counters atomically, so the class method ActiveRecord::Base.increment_counter is the right choice.

Also, there is an issue with the increment example below as it does not save automatically:

item = Item.find(1)
item.foo_count # => 0
item.increment(:foo_...