Class: ActionView::Helpers::InstanceTag

Inherits:
Object
  • Object
show all
Includes:
ActiveModelInstanceTag, DateHelperInstanceTag, FormOptionsHelper, FormTagHelper, TagHelper
Defined in:
actionpack/lib/action_view/helpers/date_helper.rb,
actionpack/lib/action_view/helpers/form_helper.rb,
actionpack/lib/action_view/helpers/form_options_helper.rb

Overview

:nodoc:

Constant Summary collapse

DEFAULT_FIELD_OPTIONS = 
{ "size" => 30 }
DEFAULT_RADIO_OPTIONS = 
{ }
DEFAULT_TEXT_AREA_OPTIONS = 
{ "cols" => 40, "rows" => 20 }

Constants included from TagHelper

TagHelper::BOOLEAN_ATTRIBUTES, TagHelper::PRE_CONTENT_STRINGS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from FormOptionsHelper

#collection_select, #grouped_collection_select, #grouped_options_for_select, #option_groups_from_collection_for_select, #options_for_select, #options_from_collection_for_select, #select, #time_zone_options_for_select, #time_zone_select

Methods included from TextHelper

#concat, #current_cycle, #cycle, #excerpt, #highlight, #pluralize, #reset_cycle, #safe_concat, #simple_format, #truncate, #word_wrap

Methods included from ActiveSupport::Concern

#append_features, extended, #included

Methods included from TagHelper

#cdata_section, #content_tag, #escape_once, #tag

Methods included from CaptureHelper

#capture, #content_for, #content_for?, #flush_output_buffer, #provide, #with_output_buffer

Methods included from SanitizeHelper

#sanitize, #sanitize_css, #strip_links, #strip_tags

Methods included from ActiveModelInstanceTag

#error_message, #error_wrapping, #tag

Methods included from FormTagHelper

#button_tag, #check_box_tag, #email_field_tag, #field_set_tag, #file_field_tag, #form_tag, #hidden_field_tag, #image_submit_tag, #label_tag, #number_field_tag, #password_field_tag, #radio_button_tag, #range_field_tag, #search_field_tag, #select_tag, #submit_tag, #telephone_field_tag, #text_area_tag, #text_field_tag, #url_field_tag, #utf8_enforcer_tag

Methods included from UrlHelper

#_routes_context, #button_to, #current_page?, #link_to, #link_to_if, #link_to_unless, #link_to_unless_current, #mail_to, #url_for, #url_options

Methods included from ActionDispatch::Routing::UrlFor

#url_for, #url_options

Methods included from ActionDispatch::Routing::PolymorphicRoutes

#polymorphic_path, #polymorphic_url

Methods included from DateHelperInstanceTag

#to_date_select_tag, #to_datetime_select_tag, #to_time_select_tag

Constructor Details

#initialize(object_name, method_name, template_object, object = nil) ⇒ InstanceTag

Returns a new instance of InstanceTag.



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 982

def initialize(object_name, method_name, template_object, object = nil)
  @object_name, @method_name = object_name.to_s.dup, method_name.to_s.dup
  @template_object = template_object

  @object_name.sub!(/\[\]$/,"") || @object_name.sub!(/\[\]\]$/,"]")
  @object = retrieve_object(object)
  @auto_index = retrieve_autoindex(Regexp.last_match.pre_match) if Regexp.last_match
end

Instance Attribute Details

#method_name ⇒ Object (readonly)

Returns the value of attribute method_name



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 976

def method_name
  @method_name
end

#object ⇒ Object (readonly)

Returns the value of attribute object



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 976

def object
  @object
end

#object_name ⇒ Object (readonly)

Returns the value of attribute object_name



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 976

def object_name
  @object_name
end

Class Method Details

.check_box_checked?(value, checked_value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1165

def check_box_checked?(value, checked_value)
  case value
  when TrueClass, FalseClass
    value
  when NilClass
    false
  when Integer
    value != 0
  when String
    value == checked_value
  when Array
    value.include?(checked_value)
  else
    value.to_i != 0
  end
end

.radio_button_checked?(value, checked_value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1182

def radio_button_checked?(value, checked_value)
  value.to_s == checked_value.to_s
end

.value(object, method_name) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1153

def value(object, method_name)
  object.send method_name if object
end

.value_before_type_cast(object, method_name) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1157

def value_before_type_cast(object, method_name)
  unless object.nil?
    object.respond_to?(method_name + "_before_type_cast") ?
    object.send(method_name + "_before_type_cast") :
    object.send(method_name)
  end
end

Instance Method Details

#retrieve_autoindex(pre_match) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1135

def retrieve_autoindex(pre_match)
  object = self.object || @template_object.instance_variable_get("@#{pre_match}")
  if object && object.respond_to?(:to_param)
    object.to_param
  else
    raise ArgumentError, "object[] naming but object param and @object var don't exist or don't respond to to_param: #{object.inspect}"
  end
end

#retrieve_object(object) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1124

def retrieve_object(object)
  if object
    object
  elsif @template_object.instance_variable_defined?("@#{@object_name}")
    @template_object.instance_variable_get("@#{@object_name}")
  end
rescue NameError
  # As @object_name may contain the nested syntax (item[subobject]) we need to fallback to nil.
  nil
end

#to_boolean_select_tag(options = {}) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1107

def to_boolean_select_tag(options = {})
  options = options.stringify_keys
  add_default_name_and_id(options)
  value = value(object)
  tag_text = "<select"
  tag_text << tag_options(options)
  tag_text << "><option value=\"false\""
  tag_text << " selected" if value == false
  tag_text << ">False</option><option value=\"true\""
  tag_text << " selected" if value
  tag_text << ">True</option></select>"
end

#to_check_box_tag(options = {}, checked_value = "1", unchecked_value = "0") ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1085

def to_check_box_tag(options = {}, checked_value = "1", unchecked_value = "0")
  options = options.stringify_keys
  options["type"]     = "checkbox"
  options["value"]    = checked_value
  if options.has_key?("checked")
    cv = options.delete "checked"
    checked = cv == true || cv == "checked"
  else
    checked = self.class.check_box_checked?(value(object), checked_value)
  end
  options["checked"] = "checked" if checked
  if options["multiple"]
    add_default_name_and_id_for_value(checked_value, options)
    options.delete("multiple")
  else
    add_default_name_and_id(options)
  end
  hidden = unchecked_value ? tag("input", "name" => options["name"], "type" => "hidden", "value" => unchecked_value, "disabled" => options["disabled"]) : ""
  checkbox = tag("input", options)
  (hidden + checkbox).html_safe
end

#to_collection_select_tag(collection, value_method, text_method, options, html_options) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_options_helper.rb', line 597

def to_collection_select_tag(collection, value_method, text_method, options, html_options)
  selected_value = options.has_key?(:selected) ? options[:selected] : value(object)
  select_content_tag(
    options_from_collection_for_select(collection, value_method, text_method, :selected => selected_value, :disabled => options[:disabled]), options, html_options
  )
end

#to_content_tag(tag_name, options = {}) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1120

def to_content_tag(tag_name, options = {})
  content_tag(tag_name, value(object), options)
end

#to_grouped_collection_select_tag(collection, group_method, group_label_method, option_key_method, option_value_method, options, html_options) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_options_helper.rb', line 604

def to_grouped_collection_select_tag(collection, group_method, group_label_method, option_key_method, option_value_method, options, html_options)
  select_content_tag(
    option_groups_from_collection_for_select(collection, group_method, group_label_method, option_key_method, option_value_method, value(object)), options, html_options
  )
end

#to_input_field_tag(field_type, options = {}) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1035

def to_input_field_tag(field_type, options = {})
  options = options.stringify_keys
  options["size"] = options["maxlength"] || DEFAULT_FIELD_OPTIONS["size"] unless options.key?("size")
  options = DEFAULT_FIELD_OPTIONS.merge(options)
  if field_type == "hidden"
    options.delete("size")
  end
  options["type"]  ||= field_type
  options["value"] = options.fetch("value"){ value_before_type_cast(object) } unless field_type == "file"
  options["value"] &&= ERB::Util.html_escape(options["value"])
  add_default_name_and_id(options)
  tag("input", options)
end

#to_label_tag(text = nil, options = {}, &block) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 991

def to_label_tag(text = nil, options = {}, &block)
  options = options.stringify_keys
  tag_value = options.delete("value")
  name_and_id = options.dup

  if name_and_id["for"]
    name_and_id["id"] = name_and_id["for"]
  else
    name_and_id.delete("id")
  end

  add_default_name_and_id_for_value(tag_value, name_and_id)
  options.delete("index")
  options.delete("namespace")
  options["for"] ||= name_and_id["id"]

  if block_given?
    @template_object.label_tag(name_and_id["id"], options, &block)
  else
    content = if text.blank?
      object_name.gsub!(/\[(.*)_attributes\]\[\d\]/, '.\1')
      method_and_value = tag_value.present? ? "#{method_name}.#{tag_value}" : method_name

      if object.respond_to?(:to_model)
        key = object.class.model_name.i18n_key
        i18n_default = ["#{key}.#{method_and_value}".to_sym, ""]
      end

      i18n_default ||= ""
      I18n.t("#{object_name}.#{method_and_value}", :default => i18n_default, :scope => "helpers.label").presence
    else
      text.to_s
    end

    content ||= if object && object.class.respond_to?(:human_attribute_name)
      object.class.human_attribute_name(method_name)
    end

    content ||= method_name.humanize

    label_tag(name_and_id["id"], content, options)
  end
end

#to_number_field_tag(field_type, options = {}) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1049

def to_number_field_tag(field_type, options = {})
  options = options.stringify_keys
  options['size'] ||= nil

  if range = options.delete("in") || options.delete("within")
    options.update("min" => range.min, "max" => range.max)
  end
  to_input_field_tag(field_type, options)
end

#to_radio_button_tag(tag_value, options = {}) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1059

def to_radio_button_tag(tag_value, options = {})
  options = DEFAULT_RADIO_OPTIONS.merge(options.stringify_keys)
  options["type"]     = "radio"
  options["value"]    = tag_value
  if options.has_key?("checked")
    cv = options.delete "checked"
    checked = cv == true || cv == "checked"
  else
    checked = self.class.radio_button_checked?(value(object), tag_value)
  end
  options["checked"]  = "checked" if checked
  add_default_name_and_id_for_value(tag_value, options)
  tag("input", options)
end

#to_select_tag(choices, options, html_options) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_options_helper.rb', line 579

def to_select_tag(choices, options, html_options)
  selected_value = options.has_key?(:selected) ? options[:selected] : value(object)
  choices = choices.to_a if choices.is_a?(Range)

  # Grouped choices look like this:
  #
  #   [nil, []]
  #   { nil => [] }
  #
  if !choices.empty? && choices.first.respond_to?(:last) && Array === choices.first.last
    option_tags = grouped_options_for_select(choices, :selected => selected_value, :disabled => options[:disabled])
  else
    option_tags = options_for_select(choices, :selected => selected_value, :disabled => options[:disabled])
  end

  select_content_tag(option_tags, options, html_options)
end

#to_text_area_tag(options = {}) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1074

def to_text_area_tag(options = {})
  options = DEFAULT_TEXT_AREA_OPTIONS.merge(options.stringify_keys)
  add_default_name_and_id(options)

  if size = options.delete("size")
    options["cols"], options["rows"] = size.split("x") if size.respond_to?(:split)
  end

  content_tag("textarea", options.delete('value') || value_before_type_cast(object), options)
end

#to_time_zone_select_tag(priority_zones, options, html_options) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_options_helper.rb', line 610

def to_time_zone_select_tag(priority_zones, options, html_options)
  select_content_tag(
      time_zone_options_for_select(value(object) || options[:default], priority_zones, options[:model] || ActiveSupport::TimeZone), options, html_options
  )
end

#value(object) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1144

def value(object)
  self.class.value(object, @method_name)
end

#value_before_type_cast(object) ⇒ Object 



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# File 'actionpack/lib/action_view/helpers/form_helper.rb', line 1148

def value_before_type_cast(object)
  self.class.value_before_type_cast(object, @method_name)
end