Deprecation: remove deprecated update_element_function, start_form_tag, and end_form_tag. Use RJS and form_tag instead.

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Deprecation: remove deprecated link_to_image and link_image_to methods. Use link_to(image_path(...), url).

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Allow array and hash query parameters. Array route parameters are converted/to/a/path as before. References #6765, #7462. Closes #7047.

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Add a #dbman attr_reader for CGI::Session and make CGI::Session::CookieStore#generate_digest public so it's easy to generate digests
using the cookie store's secret. [Rick]

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Fixed that FormTagHelper#text_area_tag should disregard :size option if it's not a string [Brendon Davidson]

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Set the original button value in an attribute of the button when using the :disable_with key with submit_tag


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Added :port and :host handling to UrlRewriter (which unified url_for usage, regardless of whether it's called in view or controller) #7616 [alancfrancis]

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Added helper(:all) as a way to include all helpers from app/helpers/**/*.rb in ApplicationController [DHH]

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Introduce a cookie-based session store as the Rails default. Sessions typically contain at most a user_id and flash message; both fit within the 4K cookie size limit. A secure hash is included with the cookie to ensure data integrity (a user cannot alter his user_id without knowing the secret key included in the hash). If you have more than 4K of session data or don't want your data to be visible to the user, pick another session store. Cookie-based sessions are dramatically faster than the alternatives.

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Added .erb and .builder as preferred aliases to the now deprecated .rhtml and .rxml extensions [Chad Fowler]. This is done to separate the renderer from the mime type. .erb templates are often used to render emails, atom, csv, whatever. So labeling them .rhtml doesn't make too much sense. The same goes for .rxml, which can be used to build everything from HTML to Atom to whatever. .rhtml and .rxml will continue to work until Rails 3.0, though. So this is a slow phasing out. All generators and examples will start using the new aliases, though.

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Added caching option to AssetTagHelper#stylesheet_link_tag and AssetTagHelper#javascript_include_tag [DHH]

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Work around the two connection per host browser limit: use asset%d.myapp.com to distribute asset requests among asset[0123].myapp.com. Use a DNS wildcard or CNAMEs to map these hosts to your asset server. See http://www.die.net/musings/page_load_time/ for background.

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Added that rendering will automatically insert the etag header on 200 OK responses. The etag is calculated using MD5 of the response body. If a request comes in that has a matching etag, the response will be changed to a 304 Not Modified and the response body will be set to an empty string. [DHH]

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Revert [6086] and [6087] since they caused a major regression with functional tests in 1.2.2. References #7372.

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Add a :url_based_filename => true option to ActionController::Streaming::send_file, which allows URL-based filenames.  [Thomas Fuchs]

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