37 lines
1.7 KiB
Ruby
37 lines
1.7 KiB
Ruby
# The methods added to this helper will be available to all templates in the application.
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module ApplicationHelper
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# Accepts a container (hash, array, enumerable, your type) and returns a string of option tags. Given a container
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# where the elements respond to first and last (such as a two-element array), the "lasts" serve as option values and
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# the "firsts" as option text. Hashes are turned into this form automatically, so the keys become "firsts" and values
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# become lasts. If +selected+ is specified, the matching "last" or element will get the selected option-tag.
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#
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# Examples (call, result):
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# html_options([["Dollar", "$"], ["Kroner", "DKK"]])
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# <option value="$">Dollar</option>\n<option value="DKK">Kroner</option>
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#
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# html_options([ "VISA", "Mastercard" ], "Mastercard")
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# <option>VISA</option>\n<option selected>Mastercard</option>
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#
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# html_options({ "Basic" => "$20", "Plus" => "$40" }, "$40")
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# <option value="$20">Basic</option>\n<option value="$40" selected>Plus</option>
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def html_options(container, selected = nil)
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container = container.to_a if Hash === container
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html_options = container.inject([]) do |options, element|
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if element.respond_to?(:first) && element.respond_to?(:last)
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if element.last != selected
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options << "<option value=\"#{element.last}\">#{element.first}</option>"
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else
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options << "<option value=\"#{element.last}\" selected>#{element.first}</option>"
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end
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else
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options << ((element != selected) ? "<option>#{element}</option>" : "<option selected>#{element}</option>")
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end
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end
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html_options.join("\n")
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end
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end
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