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module ActionView
# = Action View Record Tag Helpers
module Helpers
module RecordTagHelper
include ActionView::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:
#
# <div id="person_123" class="person foo"> Joe Bloggs </div>
#
# 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:
#
# <div id="person_123" class="person foo"> Joe Bloggs </div>
# <div id="person_124" class="person foo"> Jane Bloggs </div>
#
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 %>
# <td><%= @person.first_name %></td>
# <td><%= @person.last_name %></td>
# <% end %>
#
# would produce the following HTML (assuming @person is an instance of
# a Person object, with an id value of 123):
#
# <tr id="person_123" class="person">....</tr>
#
# If you require the HTML id attribute to have a prefix, you can specify it:
#
# <%= content_tag_for(:tr, @person, :foo) do %> ...
#
# produces:
#
# <tr id="foo_person_123" class="person">...
#
# 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 <tt>each</tt>) beforehand.
# For example (assuming @people is an array of Person objects):
#
# <%= content_tag_for(:tr, @people) do |person| %>
# <td><%= person.first_name %></td>
# <td><%= person.last_name %></td>
# <% end %>
#
# produces:
#
# <tr id="person_123" class="person">...</tr>
# <tr id="person_124" class="person">...</tr>
#
# content_tag_for also accepts a hash of options, which will be converted to
# additional HTML attributes. If you specify a <tt>:class</tt> value, it will be combined
# with the default class name for your object. For example:
#
# <%= content_tag_for(:li, @person, class: "bar") %>...
#
# produces:
#
# <li id="person_123" class="person bar">...
#
def content_tag_for(tag_name, single_or_multiple_records, prefix = nil, options = nil, &block)
options, prefix = prefix, nil if prefix.is_a?(Hash)
Array(single_or_multiple_records).map do |single_record|
content_tag_for_single_record(tag_name, single_record, prefix, options, &block)
end.join("\n").html_safe
end
private
# Called by <tt>content_tag_for</tt> internally to render a content tag
# for each record.
def content_tag_for_single_record(tag_name, record, prefix, options, &block)
options = options ? options.dup : {}
options[:class] = "#{dom_class(record, prefix)} #{options[:class]}".rstrip
options[:id] = dom_id(record, prefix)
content_tag(tag_name, capture(record, &block), options)
end
end
end
end
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