Only add ActiveRecord configuration if it is present

ids_reader method fixed, test added to has_many association (for PostgreSQL)

has_many/has_one, :dependent => :restrict, deprecation added

warning removed: shadowing outer local variable - klass

fix assets test

[MySQL] Fix GH #4754. Remove double-quote characters around PK when using sql_mode=ANSI_QUOTES

Refactor dynamic match

Fix failing test from [7619bcf2]

Character classes are the specific regexp construct
to express alternation of individual characters.

merge MRI performance methods into one file

Fixes #4764 - remove generated new line in routes.rb on scaffold generation

As explained in #4764, when destroying a scaffold, routes.rb loses a
new line. This seems to happen because a new line is added
while generating the route and the destroy generator removes it.
However, this causes a problem if the routes file is manually edited
to remove such new lines. This commit just removes that extra new line
from added in the first place.

Used block to make sure file get auto closed after use

remove ruby 1.8 support code

Replaced all 'for' loops with Enumerable#each

Add 'image/pjpeg' format used by IE

http://msdn.microsoft.com/en-us/library/ms775147%28v=vs.85%29.aspx#_replace

tiny refactoring of date_helper

use :default option with translate method instead of condition
simplify separator method

Remove initialize variable columnn, not needed

remove autoload UrlWriter, no longer exists