require 'action_controller/record_identifier'
module ActionView
# = Action View Record Tag Helpers
module Helpers
module RecordTagHelper
include ActionController::RecordIdentifier
# Produces a wrapper DIV element with id and class parameters that
# relate to the specified Active Record object. Usage example:
#
# <%= div_for(@person, :class => "foo") do %>
# <%= @person.name %>
# <% end %>
#
# produces:
#
#
Joe Bloggs
#
# You can also pass an array of Active Record objects, which will then
# get iterated over and yield each record as an argument for the block.
# For example:
#
# <%= div_for(@people, :class => "foo") do |person| %>
# <%= person.name %>
# <% end %>
#
# produces:
#
# Joe Bloggs
# Jane Bloggs
#
def div_for(record, *args, &block)
content_tag_for(:div, record, *args, &block)
end
# content_tag_for creates an HTML element with id and class parameters
# that relate to the specified Active Record object. For example:
#
# <%= content_tag_for(:tr, @person) do %>
# <%= @person.first_name %> |
# <%= @person.last_name %> |
# <% end %>
#
# would produce the following HTML (assuming @person is an instance of
# a Person object, with an id value of 123):
#
# ....
#
# If you require the HTML id attribute to have a prefix, you can specify it:
#
# <%= content_tag_for(:tr, @person, :foo) do %> ...
#
# produces:
#
# ...
#
# You can also pass an array of objects which this method will loop through
# and yield the current object to the supplied block, reducing the need for
# having to iterate through the object (using each) beforehand.
# For example (assuming @people is an array of Person objects):
#
# <%= content_tag_for(:tr, @people) do |person| %>
# <%= person.first_name %> |
# <%= person.last_name %> |
# <% end %>
#
# produces:
#
#
...
# ...
#
# content_tag_for also accepts a hash of options, which will be converted to
# additional HTML attributes. If you specify a :class value, it will be combined
# with the default class name for your object. For example:
#
# <%= content_tag_for(:li, @person, :class => "bar") %>...
#
# produces:
#
# ...
#
def content_tag_for(tag_name, single_or_multiple_records, prefix = nil, options = nil, &block)
if single_or_multiple_records.respond_to?(:to_ary)
single_or_multiple_records.to_ary.map do |single_record|
capture { content_tag_for_single_record(tag_name, single_record, prefix, options, &block) }
end.join("\n").html_safe
else
content_tag_for_single_record(tag_name, single_or_multiple_records, prefix, options, &block)
end
end
private
# Called by content_tag_for internally to render a content tag
# for each record.
def content_tag_for_single_record(tag_name, record, prefix, options, &block)
options, prefix = prefix, nil if prefix.is_a?(Hash)
options = options ? options.dup : {}
options.merge!(:class => "#{dom_class(record, prefix)} #{options[:class]}".strip, :id => dom_id(record, prefix))
if block.arity == 0
content_tag(tag_name, capture(&block), options)
else
content_tag(tag_name, capture(record, &block), options)
end
end
end
end
end