filesets_helper.rb
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	module FilesetsHelper
	# Creates a bootstrap form-group div with an additional 'Add' button next to the text field
	#
	# @param object[ActiveRecord::Object] the form's subject
	# @param resource[Symbol] the objects class
	# @param attr[Symbol] the select box's attribute
	# @param attr_name[String] the attribute's display name
	# @param placeholder[String] the text box's placeholder
	def text_with_errors_and_plus(object, resource, attr, attr_name, placeholder, value=nil)
	has_errors = object.errors[attr].present?
	content_tag(:div, class: "form-group #{attr} #{' has_error' if has_errors }") do
	attr_label = label(resource, attr, attr_name, class: 'control-label col-xs-3')
	text_div = content_tag(:div, class: 'col-xs-6') do
	text_part = text_field_tag([resource, attr].join('_').to_sym,
	value \|\| object.send(attr.to_sym),
	placeholder: placeholder,
	name: "#{resource}[#{attr}][]",
	multiple: true,
	class: 'form-control'
	) {}

	if has_errors
	text_part.concat(content_tag(:span, class: 'help-block') { object.errors[attr].first })
	end
	text_part
	end

	actions_part = content_tag(:div, class: 'col-xs-1') do
	add_link = content_tag(:a, href: '#', class: "#{attr}-plus-sign") do
	content_tag(:span, class: 'glyphicon glyphicon-plus') {}
	end

	remove_link = content_tag(:a, href: '#',
	class: "#{attr}-remove-sign", style: "display:none") do
	content_tag(:span, class: 'glyphicon glyphicon-remove text-danger') {}
	end
	add_link.concat(remove_link)
	end

	attr_label.concat(text_div).concat(actions_part)
	end
	end
	end