Deprecation

Action Pack

components

use partials and helper methods instead

@params, @session, @flash, @request, @cookies, @headers, @response

Use the params, session, flash, etc methods instead of working with the instance variables directly.

url_for(:symbol, *args), redirect_to(:symbol, *args)

use named routes instead

render_text, render_template, etc.

Use e.g. render :text => …, render :template => …, etc.

redirect_to_path, redirect_to_url.

Use redirect_to.

post_format, formatted_post?, xml_post?, yaml_post?

Use respond_to or request.format.

start_form_tag and end_form_tag

Use form_tag with a block.

update_element_function

use RJS

link_to_image, link_image_to helper methods

use link_to(image_tag(..), url)

human_size helper alias

use number_to_human_size helper method

Active Record

find_first, find_all

Use find :first and find :all.

push_with_attributes

Use has_many :through for rich many-to-many associations.

*association*_count

Use *association*.count instead

Railties

Non-namespaced rake tasks like rake migrate.

Use rake db:migrate.

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