method

image_tag

v1.2.6 - Show latest stable - Class: ActionView::Helpers::AssetTagHelper

image_tag(source, options = {})

public

Returns an html image tag for the source. The source can be a full path or a file that exists in your public images directory. Note that specifying a filename without the extension is now deprecated in Rails. You can add html attributes using the options. The options supports two additional keys for convienence and conformance:

:alt - If no alt text is given, the file name part of the source is used (capitalized and without the extension)
:size - Supplied as "{Width}x{Height}", so "30x45" becomes width="30" and height="45". :size will be ignored if the value is not in the correct format.

 image_tag("icon.png")  # =>
   <img src="/images/icon.png" alt="Icon" />
 image_tag("icon.png", :size => "16x10", :alt => "Edit Entry")  # =>
   <img src="/images/icon.png" width="16" height="10" alt="Edit Entry" />
 image_tag("/icons/icon.gif", :size => "16x16")  # =>
   <img src="/icons/icon.gif" width="16" height="16" alt="Icon" />

# File actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 185
      def image_tag(source, options = {})
        options.symbolize_keys!
                
        options[:src] = image_path(source)
        options[:alt] ||= File.basename(options[:src], '.*').split('.').first.capitalize
        
        if options[:size]
          options[:width], options[:height] = options[:size].split("x") if options[:size] =~ %r{^\d+x\d+$}
          options.delete(:size)
        end

        tag("img", options)
      end

3Notes

watch out for urls with &

grosser · Jul 10, 2008

image_tag('x.com/aaa?a=1&b=2') = x.com/aaa?a=1&b=2

By images's sub dirctionary to img tag

RobinWu · Oct 31, 2008

=== image_tag("icons/edit.png") # => edit

Specify your own template

Ramon · Mar 10, 2010

You can specify you own template this way:

def notice
...
@template = "some_other_name.html.erb"
end

image_tag

3Notes

watch out for urls with &

By images's sub dirctionary to img tag

Specify your own template

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