--- /dev/null
+require 'cgi'
+require 'action_view/helpers/date_helper'
+require 'action_view/helpers/tag_helper'
+require 'action_view/helpers/form_tag_helper'
+
+module ActionView
+ module Helpers
+ # Form helpers are designed to make working with models much easier compared to using just standard HTML
+ # elements by providing a set of methods for creating forms based on your models. This helper generates the HTML
+ # for forms, providing a method for each sort of input (e.g., text, password, select, and so on). When the form
+ # is submitted (i.e., when the user hits the submit button or <tt>form.submit</tt> is called via JavaScript), the form inputs will be bundled into the <tt>params</tt> object and passed back to the controller.
+ #
+ # There are two types of form helpers: those that specifically work with model attributes and those that don't.
+ # This helper deals with those that work with model attributes; to see an example of form helpers that don't work
+ # with model attributes, check the ActionView::Helpers::FormTagHelper documentation.
+ #
+ # The core method of this helper, form_for, gives you the ability to create a form for a model instance;
+ # for example, let's say that you have a model <tt>Person</tt> and want to create a new instance of it:
+ #
+ # # Note: a @person variable will have been created in the controller.
+ # # For example: @person = Person.new
+ # <% form_for :person, @person, :url => { :action => "create" } do |f| %>
+ # <%= f.text_field :first_name %>
+ # <%= f.text_field :last_name %>
+ # <%= submit_tag 'Create' %>
+ # <% end %>
+ #
+ # The HTML generated for this would be:
+ #
+ # <form action="/persons/create" method="post">
+ # <input id="person_first_name" name="person[first_name]" size="30" type="text" />
+ # <input id="person_last_name" name="person[last_name]" size="30" type="text" />
+ # <input name="commit" type="submit" value="Create" />
+ # </form>
+ #
+ # If you are using a partial for your form fields, you can use this shortcut:
+ #
+ # <% form_for :person, @person, :url => { :action => "create" } do |f| %>
+ # <%= render :partial => f %>
+ # <%= submit_tag 'Create' %>
+ # <% end %>
+ #
+ # This example will render the <tt>people/_form</tt> partial, setting a local variable called <tt>form</tt> which references the yielded FormBuilder.
+ #
+ # The <tt>params</tt> object created when this form is submitted would look like:
+ #
+ # {"action"=>"create", "controller"=>"persons", "person"=>{"first_name"=>"William", "last_name"=>"Smith"}}
+ #
+ # The params hash has a nested <tt>person</tt> value, which can therefore be accessed with <tt>params[:person]</tt> in the controller.
+ # If were editing/updating an instance (e.g., <tt>Person.find(1)</tt> rather than <tt>Person.new</tt> in the controller), the objects
+ # attribute values are filled into the form (e.g., the <tt>person_first_name</tt> field would have that person's first name in it).
+ #
+ # If the object name contains square brackets the id for the object will be inserted. For example:
+ #
+ # <%= text_field "person[]", "name" %>
+ #
+ # ...will generate the following ERb.
+ #
+ # <input type="text" id="person_<%= @person.id %>_name" name="person[<%= @person.id %>][name]" value="<%= @person.name %>" />
+ #
+ # If the helper is being used to generate a repetitive sequence of similar form elements, for example in a partial
+ # used by <tt>render_collection_of_partials</tt>, the <tt>index</tt> option may come in handy. Example:
+ #
+ # <%= text_field "person", "name", "index" => 1 %>
+ #
+ # ...becomes...
+ #
+ # <input type="text" id="person_1_name" name="person[1][name]" value="<%= @person.name %>" />
+ #
+ # An <tt>index</tt> option may also be passed to <tt>form_for</tt> and <tt>fields_for</tt>. This automatically applies
+ # the <tt>index</tt> to all the nested fields.
+ #
+ # There are also methods for helping to build form tags in link:classes/ActionView/Helpers/FormOptionsHelper.html,
+ # link:classes/ActionView/Helpers/DateHelper.html, and link:classes/ActionView/Helpers/ActiveRecordHelper.html
+ module FormHelper
+ # Creates a form and a scope around a specific model object that is used as
+ # a base for questioning about values for the fields.
+ #
+ # Rails provides succinct resource-oriented form generation with +form_for+
+ # like this:
+ #
+ # <% form_for @offer do |f| %>
+ # <%= f.label :version, 'Version' %>:
+ # <%= f.text_field :version %><br />
+ # <%= f.label :author, 'Author' %>:
+ # <%= f.text_field :author %><br />
+ # <% end %>
+ #
+ # There, +form_for+ is able to generate the rest of RESTful form parameters
+ # based on introspection on the record, but to understand what it does we
+ # need to dig first into the alternative generic usage it is based upon.
+ #
+ # === Generic form_for
+ #
+ # The generic way to call +form_for+ yields a form builder around a model:
+ #
+ # <% form_for :person, :url => { :action => "update" } do |f| %>
+ # <%= f.error_messages %>
+ # First name: <%= f.text_field :first_name %><br />
+ # Last name : <%= f.text_field :last_name %><br />
+ # Biography : <%= f.text_area :biography %><br />
+ # Admin? : <%= f.check_box :admin %><br />
+ # <% end %>
+ #
+ # There, the first argument is a symbol or string with the name of the
+ # object the form is about, and also the name of the instance variable the
+ # object is stored in.
+ #
+ # The form builder acts as a regular form helper that somehow carries the
+ # model. Thus, the idea is that
+ #
+ # <%= f.text_field :first_name %>
+ #
+ # gets expanded to
+ #
+ # <%= text_field :person, :first_name %>
+ #
+ # If the instance variable is not <tt>@person</tt> you can pass the actual
+ # record as the second argument:
+ #
+ # <% form_for :person, person, :url => { :action => "update" } do |f| %>
+ # ...
+ # <% end %>
+ #
+ # In that case you can think
+ #
+ # <%= f.text_field :first_name %>
+ #
+ # gets expanded to
+ #
+ # <%= text_field :person, :first_name, :object => person %>
+ #
+ # You can even display error messages of the wrapped model this way:
+ #
+ # <%= f.error_messages %>
+ #
+ # In any of its variants, the rightmost argument to +form_for+ is an
+ # optional hash of options:
+ #
+ # * <tt>:url</tt> - The URL the form is submitted to. It takes the same fields
+ # you pass to +url_for+ or +link_to+. In particular you may pass here a
+ # named route directly as well. Defaults to the current action.
+ # * <tt>:html</tt> - Optional HTML attributes for the form tag.
+ #
+ # Worth noting is that the +form_for+ tag is called in a ERb evaluation block,
+ # not an ERb output block. So that's <tt><% %></tt>, not <tt><%= %></tt>.
+ #
+ # Also note that +form_for+ doesn't create an exclusive scope. It's still
+ # possible to use both the stand-alone FormHelper methods and methods from
+ # FormTagHelper. For example:
+ #
+ # <% form_for :person, @person, :url => { :action => "update" } do |f| %>
+ # First name: <%= f.text_field :first_name %>
+ # Last name : <%= f.text_field :last_name %>
+ # Biography : <%= text_area :person, :biography %>
+ # Admin? : <%= check_box_tag "person[admin]", @person.company.admin? %>
+ # <% end %>
+ #
+ # This also works for the methods in FormOptionHelper and DateHelper that are
+ # designed to work with an object as base, like FormOptionHelper#collection_select
+ # and DateHelper#datetime_select.
+ #
+ # === Resource-oriented style
+ #
+ # As we said above, in addition to manually configuring the +form_for+ call,
+ # you can rely on automated resource identification, which will use the conventions
+ # and named routes of that approach. This is the preferred way to use +form_for+
+ # nowadays.
+ #
+ # For example, if <tt>@post</tt> is an existing record you want to edit
+ #
+ # <% form_for @post do |f| %>
+ # ...
+ # <% end %>
+ #
+ # is equivalent to something like:
+ #
+ # <% form_for :post, @post, :url => post_path(@post), :html => { :method => :put, :class => "edit_post", :id => "edit_post_45" } do |f| %>
+ # ...
+ # <% end %>
+ #
+ # And for new records
+ #
+ # <% form_for(Post.new) do |f| %>
+ # ...
+ # <% end %>
+ #
+ # expands to
+ #
+ # <% form_for :post, Post.new, :url => posts_path, :html => { :class => "new_post", :id => "new_post" } do |f| %>
+ # ...
+ # <% end %>
+ #
+ # You can also overwrite the individual conventions, like this:
+ #
+ # <% form_for(@post, :url => super_post_path(@post)) do |f| %>
+ # ...
+ # <% end %>
+ #
+ # And for namespaced routes, like +admin_post_url+:
+ #
+ # <% form_for([:admin, @post]) do |f| %>
+ # ...
+ # <% end %>
+ #
+ # === Customized form builders
+ #
+ # You can also build forms using a customized FormBuilder class. Subclass FormBuilder and override or define some more helpers,
+ # then use your custom builder. For example, let's say you made a helper to automatically add labels to form inputs.
+ #
+ # <% form_for :person, @person, :url => { :action => "update" }, :builder => LabellingFormBuilder do |f| %>
+ # <%= f.text_field :first_name %>
+ # <%= f.text_field :last_name %>
+ # <%= text_area :person, :biography %>
+ # <%= check_box_tag "person[admin]", @person.company.admin? %>
+ # <% end %>
+ #
+ # In this case, if you use this:
+ #
+ # <%= render :partial => f %>
+ #
+ # The rendered template is <tt>people/_labelling_form</tt> and the local variable referencing the form builder is called <tt>labelling_form</tt>.
+ #
+ # In many cases you will want to wrap the above in another helper, so you could do something like the following:
+ #
+ # def labelled_form_for(record_or_name_or_array, *args, &proc)
+ # options = args.extract_options!
+ # form_for(record_or_name_or_array, *(args << options.merge(:builder => LabellingFormBuilder)), &proc)
+ # end
+ #
+ # If you don't need to attach a form to a model instance, then check out FormTagHelper#form_tag.
+ def form_for(record_or_name_or_array, *args, &proc)
+ raise ArgumentError, "Missing block" unless block_given?
+
+ options = args.extract_options!
+
+ case record_or_name_or_array
+ when String, Symbol
+ object_name = record_or_name_or_array
+ when Array
+ object = record_or_name_or_array.last
+ object_name = ActionController::RecordIdentifier.singular_class_name(object)
+ apply_form_for_options!(record_or_name_or_array, options)
+ args.unshift object
+ else
+ object = record_or_name_or_array
+ object_name = ActionController::RecordIdentifier.singular_class_name(object)
+ apply_form_for_options!([object], options)
+ args.unshift object
+ end
+
+ concat(form_tag(options.delete(:url) || {}, options.delete(:html) || {}))
+ fields_for(object_name, *(args << options), &proc)
+ concat('</form>')
+ end
+
+ def apply_form_for_options!(object_or_array, options) #:nodoc:
+ object = object_or_array.is_a?(Array) ? object_or_array.last : object_or_array
+
+ html_options =
+ if object.respond_to?(:new_record?) && object.new_record?
+ { :class => dom_class(object, :new), :id => dom_id(object), :method => :post }
+ else
+ { :class => dom_class(object, :edit), :id => dom_id(object, :edit), :method => :put }
+ end
+
+ options[:html] ||= {}
+ options[:html].reverse_merge!(html_options)
+ options[:url] ||= polymorphic_path(object_or_array)
+ end
+
+ # Creates a scope around a specific model object like form_for, but doesn't create the form tags themselves. This makes
+ # fields_for suitable for specifying additional model objects in the same form:
+ #
+ # ==== Examples
+ # <% form_for @person, :url => { :action => "update" } do |person_form| %>
+ # First name: <%= person_form.text_field :first_name %>
+ # Last name : <%= person_form.text_field :last_name %>
+ #
+ # <% fields_for @person.permission do |permission_fields| %>
+ # Admin? : <%= permission_fields.check_box :admin %>
+ # <% end %>
+ # <% end %>
+ #
+ # ...or if you have an object that needs to be represented as a different parameter, like a Client that acts as a Person:
+ #
+ # <% fields_for :person, @client do |permission_fields| %>
+ # Admin?: <%= permission_fields.check_box :admin %>
+ # <% end %>
+ #
+ # ...or if you don't have an object, just a name of the parameter
+ #
+ # <% fields_for :person do |permission_fields| %>
+ # Admin?: <%= permission_fields.check_box :admin %>
+ # <% end %>
+ #
+ # Note: This also works for the methods in FormOptionHelper and DateHelper that are designed to work with an object as base,
+ # like FormOptionHelper#collection_select and DateHelper#datetime_select.
+ def fields_for(record_or_name_or_array, *args, &block)
+ raise ArgumentError, "Missing block" unless block_given?
+ options = args.extract_options!
+
+ case record_or_name_or_array
+ when String, Symbol
+ object_name = record_or_name_or_array
+ object = args.first
+ else
+ object = record_or_name_or_array
+ object_name = ActionController::RecordIdentifier.singular_class_name(object)
+ end
+
+ builder = options[:builder] || ActionView::Base.default_form_builder
+ yield builder.new(object_name, object, self, options, block)
+ end
+
+ # Returns a label tag tailored for labelling an input field for a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). The text of label will default to the attribute name unless you specify
+ # it explicitly. Additional options on the label tag can be passed as a hash with +options+. These options will be tagged
+ # onto the HTML as an HTML element attribute as in the example shown.
+ #
+ # ==== Examples
+ # label(:post, :title)
+ # # => <label for="post_title">Title</label>
+ #
+ # label(:post, :title, "A short title")
+ # # => <label for="post_title">A short title</label>
+ #
+ # label(:post, :title, "A short title", :class => "title_label")
+ # # => <label for="post_title" class="title_label">A short title</label>
+ #
+ def label(object_name, method, text = nil, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_label_tag(text, options)
+ end
+
+ # Returns an input tag of the "text" type tailored for accessing a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
+ # hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
+ # shown.
+ #
+ # ==== Examples
+ # text_field(:post, :title, :size => 20)
+ # # => <input type="text" id="post_title" name="post[title]" size="20" value="#{@post.title}" />
+ #
+ # text_field(:post, :title, :class => "create_input")
+ # # => <input type="text" id="post_title" name="post[title]" value="#{@post.title}" class="create_input" />
+ #
+ # text_field(:session, :user, :onchange => "if $('session[user]').value == 'admin' { alert('Your login can not be admin!'); }")
+ # # => <input type="text" id="session_user" name="session[user]" value="#{@session.user}" onchange = "if $('session[user]').value == 'admin' { alert('Your login can not be admin!'); }"/>
+ #
+ # text_field(:snippet, :code, :size => 20, :class => 'code_input')
+ # # => <input type="text" id="snippet_code" name="snippet[code]" size="20" value="#{@snippet.code}" class="code_input" />
+ #
+ def text_field(object_name, method, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("text", options)
+ end
+
+ # Returns an input tag of the "password" type tailored for accessing a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
+ # hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
+ # shown.
+ #
+ # ==== Examples
+ # password_field(:login, :pass, :size => 20)
+ # # => <input type="text" id="login_pass" name="login[pass]" size="20" value="#{@login.pass}" />
+ #
+ # password_field(:account, :secret, :class => "form_input")
+ # # => <input type="text" id="account_secret" name="account[secret]" value="#{@account.secret}" class="form_input" />
+ #
+ # password_field(:user, :password, :onchange => "if $('user[password]').length > 30 { alert('Your password needs to be shorter!'); }")
+ # # => <input type="text" id="user_password" name="user[password]" value="#{@user.password}" onchange = "if $('user[password]').length > 30 { alert('Your password needs to be shorter!'); }"/>
+ #
+ # password_field(:account, :pin, :size => 20, :class => 'form_input')
+ # # => <input type="text" id="account_pin" name="account[pin]" size="20" value="#{@account.pin}" class="form_input" />
+ #
+ def password_field(object_name, method, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("password", options)
+ end
+
+ # Returns a hidden input tag tailored for accessing a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
+ # hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
+ # shown.
+ #
+ # ==== Examples
+ # hidden_field(:signup, :pass_confirm)
+ # # => <input type="hidden" id="signup_pass_confirm" name="signup[pass_confirm]" value="#{@signup.pass_confirm}" />
+ #
+ # hidden_field(:post, :tag_list)
+ # # => <input type="hidden" id="post_tag_list" name="post[tag_list]" value="#{@post.tag_list}" />
+ #
+ # hidden_field(:user, :token)
+ # # => <input type="hidden" id="user_token" name="user[token]" value="#{@user.token}" />
+ def hidden_field(object_name, method, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("hidden", options)
+ end
+
+ # Returns an file upload input tag tailored for accessing a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
+ # hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
+ # shown.
+ #
+ # ==== Examples
+ # file_field(:user, :avatar)
+ # # => <input type="file" id="user_avatar" name="user[avatar]" />
+ #
+ # file_field(:post, :attached, :accept => 'text/html')
+ # # => <input type="file" id="post_attached" name="post[attached]" />
+ #
+ # file_field(:attachment, :file, :class => 'file_input')
+ # # => <input type="file" id="attachment_file" name="attachment[file]" class="file_input" />
+ #
+ def file_field(object_name, method, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("file", options)
+ end
+
+ # Returns a textarea opening and closing tag set tailored for accessing a specified attribute (identified by +method+)
+ # on an object assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
+ # hash with +options+.
+ #
+ # ==== Examples
+ # text_area(:post, :body, :cols => 20, :rows => 40)
+ # # => <textarea cols="20" rows="40" id="post_body" name="post[body]">
+ # # #{@post.body}
+ # # </textarea>
+ #
+ # text_area(:comment, :text, :size => "20x30")
+ # # => <textarea cols="20" rows="30" id="comment_text" name="comment[text]">
+ # # #{@comment.text}
+ # # </textarea>
+ #
+ # text_area(:application, :notes, :cols => 40, :rows => 15, :class => 'app_input')
+ # # => <textarea cols="40" rows="15" id="application_notes" name="application[notes]" class="app_input">
+ # # #{@application.notes}
+ # # </textarea>
+ #
+ # text_area(:entry, :body, :size => "20x20", :disabled => 'disabled')
+ # # => <textarea cols="20" rows="20" id="entry_body" name="entry[body]" disabled="disabled">
+ # # #{@entry.body}
+ # # </textarea>
+ def text_area(object_name, method, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_text_area_tag(options)
+ end
+
+ # Returns a checkbox tag tailored for accessing a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). This object must be an instance object (@object) and not a local object.
+ # It's intended that +method+ returns an integer and if that integer is above zero, then the checkbox is checked.
+ # Additional options on the input tag can be passed as a hash with +options+. The +checked_value+ defaults to 1
+ # while the default +unchecked_value+ is set to 0 which is convenient for boolean values.
+ #
+ # ==== Gotcha
+ #
+ # The HTML specification says unchecked check boxes are not successful, and
+ # thus web browsers do not send them. Unfortunately this introduces a gotcha:
+ # if an Invoice model has a +paid+ flag, and in the form that edits a paid
+ # invoice the user unchecks its check box, no +paid+ parameter is sent. So,
+ # any mass-assignment idiom like
+ #
+ # @invoice.update_attributes(params[:invoice])
+ #
+ # wouldn't update the flag.
+ #
+ # To prevent this the helper generates a hidden field with the same name as
+ # the checkbox after the very check box. So, the client either sends only the
+ # hidden field (representing the check box is unchecked), or both fields.
+ # Since the HTML specification says key/value pairs have to be sent in the
+ # same order they appear in the form and Rails parameters extraction always
+ # gets the first occurrence of any given key, that works in ordinary forms.
+ #
+ # Unfortunately that workaround does not work when the check box goes
+ # within an array-like parameter, as in
+ #
+ # <% fields_for "project[invoice_attributes][]", invoice, :index => nil do |form| %>
+ # <%= form.check_box :paid %>
+ # ...
+ # <% end %>
+ #
+ # because parameter name repetition is precisely what Rails seeks to distinguish
+ # the elements of the array.
+ #
+ # ==== Examples
+ # # Let's say that @post.validated? is 1:
+ # check_box("post", "validated")
+ # # => <input type="checkbox" id="post_validated" name="post[validated]" value="1" />
+ # # <input name="post[validated]" type="hidden" value="0" />
+ #
+ # # Let's say that @puppy.gooddog is "no":
+ # check_box("puppy", "gooddog", {}, "yes", "no")
+ # # => <input type="checkbox" id="puppy_gooddog" name="puppy[gooddog]" value="yes" />
+ # # <input name="puppy[gooddog]" type="hidden" value="no" />
+ #
+ # check_box("eula", "accepted", { :class => 'eula_check' }, "yes", "no")
+ # # => <input type="checkbox" class="eula_check" id="eula_accepted" name="eula[accepted]" value="yes" />
+ # # <input name="eula[accepted]" type="hidden" value="no" />
+ #
+ def check_box(object_name, method, options = {}, checked_value = "1", unchecked_value = "0")
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_check_box_tag(options, checked_value, unchecked_value)
+ end
+
+ # Returns a radio button tag for accessing a specified attribute (identified by +method+) on an object
+ # assigned to the template (identified by +object+). If the current value of +method+ is +tag_value+ the
+ # radio button will be checked. Additional options on the input tag can be passed as a
+ # hash with +options+.
+ #
+ # ==== Examples
+ # # Let's say that @post.category returns "rails":
+ # radio_button("post", "category", "rails")
+ # radio_button("post", "category", "java")
+ # # => <input type="radio" id="post_category_rails" name="post[category]" value="rails" checked="checked" />
+ # # <input type="radio" id="post_category_java" name="post[category]" value="java" />
+ #
+ # radio_button("user", "receive_newsletter", "yes")
+ # radio_button("user", "receive_newsletter", "no")
+ # # => <input type="radio" id="user_receive_newsletter_yes" name="user[receive_newsletter]" value="yes" />
+ # # <input type="radio" id="user_receive_newsletter_no" name="user[receive_newsletter]" value="no" checked="checked" />
+ def radio_button(object_name, method, tag_value, options = {})
+ InstanceTag.new(object_name, method, self, options.delete(:object)).to_radio_button_tag(tag_value, options)
+ end
+ end
+
+ class InstanceTag #:nodoc:
+ include Helpers::TagHelper, Helpers::FormTagHelper
+
+ attr_reader :method_name, :object_name
+
+ DEFAULT_FIELD_OPTIONS = { "size" => 30 }.freeze unless const_defined?(:DEFAULT_FIELD_OPTIONS)
+ DEFAULT_RADIO_OPTIONS = { }.freeze unless const_defined?(:DEFAULT_RADIO_OPTIONS)
+ DEFAULT_TEXT_AREA_OPTIONS = { "cols" => 40, "rows" => 20 }.freeze unless const_defined?(:DEFAULT_TEXT_AREA_OPTIONS)
+
+ 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 = object
+ if @object_name.sub!(/\[\]$/,"") || @object_name.sub!(/\[\]\]$/,"]")
+ if (object ||= @template_object.instance_variable_get("@#{Regexp.last_match.pre_match}")) && object.respond_to?(:to_param)
+ @auto_index = 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
+ end
+
+ def to_label_tag(text = nil, options = {})
+ options = options.stringify_keys
+ name_and_id = options.dup
+ add_default_name_and_id(name_and_id)
+ options.delete("index")
+ options["for"] ||= name_and_id["id"]
+ content = (text.blank? ? nil : text.to_s) || method_name.humanize
+ label_tag(name_and_id["id"], content, options)
+ end
+
+ 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"] ||= value_before_type_cast(object) unless field_type == "file"
+ options["value"] &&= html_escape(options["value"])
+ add_default_name_and_id(options)
+ tag("input", options)
+ end
+
+ 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
+ pretty_tag_value = tag_value.to_s.gsub(/\s/, "_").gsub(/\W/, "").downcase
+ options["id"] ||= defined?(@auto_index) ?
+ "#{tag_id_with_index(@auto_index)}_#{pretty_tag_value}" :
+ "#{tag_id}_#{pretty_tag_value}"
+ add_default_name_and_id(options)
+ tag("input", options)
+ end
+
+ 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", html_escape(options.delete('value') || value_before_type_cast(object)), options)
+ end
+
+ 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
+ add_default_name_and_id(options)
+ tag("input", options) << tag("input", "name" => options["name"], "type" => "hidden", "value" => options['disabled'] && checked ? checked_value : unchecked_value)
+ end
+
+ 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
+
+ def to_content_tag(tag_name, options = {})
+ content_tag(tag_name, value(object), options)
+ end
+
+ def object
+ @object || @template_object.instance_variable_get("@#{@object_name}")
+ rescue NameError
+ # As @object_name may contain the nested syntax (item[subobject]) we
+ # need to fallback to nil.
+ nil
+ end
+
+ def value(object)
+ self.class.value(object, @method_name)
+ end
+
+ def value_before_type_cast(object)
+ self.class.value_before_type_cast(object, @method_name)
+ end
+
+ class << self
+ def value(object, method_name)
+ object.send method_name unless object.nil?
+ end
+
+ 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
+
+ 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
+
+ def radio_button_checked?(value, checked_value)
+ value.to_s == checked_value.to_s
+ end
+ end
+
+ private
+ def add_default_name_and_id(options)
+ if options.has_key?("index")
+ options["name"] ||= tag_name_with_index(options["index"])
+ options["id"] ||= tag_id_with_index(options["index"])
+ options.delete("index")
+ elsif defined?(@auto_index)
+ options["name"] ||= tag_name_with_index(@auto_index)
+ options["id"] ||= tag_id_with_index(@auto_index)
+ else
+ options["name"] ||= tag_name + (options.has_key?('multiple') ? '[]' : '')
+ options["id"] ||= tag_id
+ end
+ end
+
+ def tag_name
+ "#{@object_name}[#{sanitized_method_name}]"
+ end
+
+ def tag_name_with_index(index)
+ "#{@object_name}[#{index}][#{sanitized_method_name}]"
+ end
+
+ def tag_id
+ "#{sanitized_object_name}_#{sanitized_method_name}"
+ end
+
+ def tag_id_with_index(index)
+ "#{sanitized_object_name}_#{index}_#{sanitized_method_name}"
+ end
+
+ def sanitized_object_name
+ @sanitized_object_name ||= @object_name.gsub(/\]\[|[^-a-zA-Z0-9:.]/, "_").sub(/_$/, "")
+ end
+
+ def sanitized_method_name
+ @sanitized_method_name ||= @method_name.sub(/\?$/,"")
+ end
+ end
+
+ class FormBuilder #:nodoc:
+ # The methods which wrap a form helper call.
+ class_inheritable_accessor :field_helpers
+ self.field_helpers = (FormHelper.instance_methods - ['form_for'])
+
+ attr_accessor :object_name, :object, :options
+
+ def initialize(object_name, object, template, options, proc)
+ @object_name, @object, @template, @options, @proc = object_name, object, template, options, proc
+ @default_options = @options ? @options.slice(:index) : {}
+ if @object_name.to_s.match(/\[\]$/)
+ if object ||= @template.instance_variable_get("@#{Regexp.last_match.pre_match}") and object.respond_to?(:to_param)
+ @auto_index = 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
+ end
+
+ (field_helpers - %w(label check_box radio_button fields_for)).each do |selector|
+ src = <<-end_src
+ def #{selector}(method, options = {})
+ @template.send(#{selector.inspect}, @object_name, method, objectify_options(options))
+ end
+ end_src
+ class_eval src, __FILE__, __LINE__
+ end
+
+ def fields_for(record_or_name_or_array, *args, &block)
+ if options.has_key?(:index)
+ index = "[#{options[:index]}]"
+ elsif defined?(@auto_index)
+ self.object_name = @object_name.to_s.sub(/\[\]$/,"")
+ index = "[#{@auto_index}]"
+ else
+ index = ""
+ end
+
+ case record_or_name_or_array
+ when String, Symbol
+ name = "#{object_name}#{index}[#{record_or_name_or_array}]"
+ when Array
+ object = record_or_name_or_array.last
+ name = "#{object_name}#{index}[#{ActionController::RecordIdentifier.singular_class_name(object)}]"
+ args.unshift(object)
+ else
+ object = record_or_name_or_array
+ name = "#{object_name}#{index}[#{ActionController::RecordIdentifier.singular_class_name(object)}]"
+ args.unshift(object)
+ end
+
+ @template.fields_for(name, *args, &block)
+ end
+
+ def label(method, text = nil, options = {})
+ @template.label(@object_name, method, text, objectify_options(options))
+ end
+
+ def check_box(method, options = {}, checked_value = "1", unchecked_value = "0")
+ @template.check_box(@object_name, method, objectify_options(options), checked_value, unchecked_value)
+ end
+
+ def radio_button(method, tag_value, options = {})
+ @template.radio_button(@object_name, method, tag_value, objectify_options(options))
+ end
+
+ def error_message_on(method, *args)
+ @template.error_message_on(@object, method, *args)
+ end
+
+ def error_messages(options = {})
+ @template.error_messages_for(@object_name, objectify_options(options))
+ end
+
+ def submit(value = "Save changes", options = {})
+ @template.submit_tag(value, options.reverse_merge(:id => "#{object_name}_submit"))
+ end
+
+ private
+ def objectify_options(options)
+ @default_options.merge(options.merge(:object => @object))
+ end
+ end
+ end
+
+ class Base
+ cattr_accessor :default_form_builder
+ self.default_form_builder = ::ActionView::Helpers::FormBuilder
+ end
+end
projects / depot.git / blobdiff