Module ActionView::Helpers::FormOptionsHelper

Return select and option tags for the given object and method using #options_from_collection_for_select to generate the list of option tags.

Returns a string of option tags for pretty much any country in the world. Supply a country name as selected to have it marked as the selected option tag. You can also supply an array of countries as priority_countries, so that they will be listed above the rest of the (long) list.

NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.

Return select and option tags for the given object and method, using #country_options_for_select to generate the list of option tags.

Returns a string of option tags, like #options_from_collection_for_select, but surrounds them with <optgroup> tags.

An array of group objects are passed. Each group should return an array of options when calling group_method Each group should return its name when calling group_label_method.

html_option_groups_from_collection(@continents, “countries”, “continent_name”, “country_id”, “country_name”, @selected_country.id)

Could become:

<optgroup label="Africa">
 <select>Egypt</select>
 <select>Rwanda</select>
 ...
</optgroup>
<optgroup label="Asia">
 <select>China</select>
 <select>India</select>
 <select>Japan</select>
 ...
</optgroup>

with objects of the following classes: class Continent

def initialize(p_name, p_countries) @continent_name = p_name; @countries = p_countries; end
def continent_name() @continent_name; end
def countries() @countries; end

end class Country

def initialize(id, name) @id = id; @name = name end
def country_id() @id; end
def country_name() @name; end

end

NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.

Accepts a container (hash, array, enumerable, your type) and returns a string of option tags. Given a container where the elements respond to first and last (such as a two-element array), the “lasts” serve as option values and the “firsts” as option text. Hashes are turned into this form automatically, so the keys become “firsts” and values become lasts. If selected is specified, the matching “last” or element will get the selected option-tag. Selected may also be an array of values to be selected when using a multiple select.

Examples (call, result):

options_for_select([["Dollar", "$"], ["Kroner", "DKK"]])
  <option value="$">Dollar<%roption>\n<option value="DKK">Kroner</ption>

options_for_select([ "VISA", "MasterCard" ], "MasterCard")
  <option>VISA<%roption>\n<option selected="selected">MasterCard</ption>

options_for_select({ "Basic" => "$20", "Plus" => "$40" }, "$40")
  <option value="$20">Basic<%roption>\n<option value="$40" selected="selected">Plus</ption>

options_for_select([ "VISA", "MasterCard", "Discover" ], ["VISA", "Discover"])
  <option selected="selected">VISA<%roption>\n<option>MasterCard</ption>\n<option selected="selected">Discover<%roption>

NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.

Returns a string of option tags that have been compiled by iterating over the collection and assigning the the result of a call to the value_method as the option value and the text_method as the option text. If selected_value is specified, the element returning a match on value_method will get the selected option tag.

Example (call, result). Imagine a loop iterating over each person in @project.people to generate an input tag:

options_from_collection_for_select(@project.people, "id", "name")
  <option value="#{person.id}">#{person.name}</option>

NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.

Create a select tag and a series of contained option tags for the provided object and method. The option currently held by the object will be selected, provided that the object is available. See #options_for_select for the required format of the choices parameter.

Example with @post.person_id => 1:

select("post", "person_id", Person.find(:all).collect {|p| [ p.name, p.id ] }, { :include_blank => true })

could become:

<select name="post[person_id]">
  <option></option>
  <option value="1" selected="selected">David</option>
  <option value="2">Sam</option>
  <option value="3">Tobias</option>
</select>

This can be used to provide a default set of options in the standard way: before rendering the create form, a new model instance is assigned the default options and bound to @model_name. Usually this model is not saved to the database. Instead, a second model object is created when the create request is received. This allows the user to submit a form page more than once with the expected results of creating multiple records. In addition, this allows a single partial to be used to generate form inputs for both edit and create forms.

By default, post.person_id is the selected option. Specify :selected => value to use a different selection or :selected => nil to leave all options unselected.

Returns a string of option tags for pretty much any time zone in the world. Supply a TimeZone name as selected to have it marked as the selected option tag. You can also supply an array of TimeZone objects as priority_zones, so that they will be listed above the rest of the (long) list. (You can use MockTimeZone.us_zones as a convenience for obtaining a list of the US time zones.)

The selected parameter must be either nil, or a string that names a TimeZone.

By default, model is the TimeZone constant (which can be obtained in ActiveRecord as a value object). The only requirement is that the model parameter be an object that responds to all, and returns an array of objects that represent time zones.

NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.

Return select and option tags for the given object and method, using time_zone_options_for_select to generate the list of option tags.

In addition to the :include_blank option documented above, this method also supports a :model option, which defaults to TimeZone. This may be used by users to specify a different time zone model object. (See time_zone_options_for_select for more information.)