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Grammatical and whitespace fixes for form helper docs. Closes #10062 [chuyeow]
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8080 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
This commit is contained in:
Michael Koziarski
parent
7e6bb82f44
commit
aa1313dd3b
1 changed files with 42 additions and 43 deletions
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@ -4,20 +4,19 @@ require 'action_view/helpers/tag_helper'
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module ActionView
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module Helpers
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# Form helpers are designed to make working with models much easier than just standard html elements by
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# providing a set of methods for creating forms based on your models. This helper generates the HTML for forms,
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# providing a method for each sort of input (e.g., text, password, select, and so on). When the form is
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# submitted (i.e., when the user hits the submit button or <tt>form.submit</tt> is called via JavaScript), the form
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# inputs will be bundled into the <tt>params</tt> object and passed back to the controller.
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# Form helpers are designed to make working with models much easier compared to using just standard HTML
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# elements by providing a set of methods for creating forms based on your models. This helper generates the HTML
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# for forms, providing a method for each sort of input (e.g., text, password, select, and so on). When the form
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# 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.
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#
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# There are two types of form helpers: those that specifically work with model attributes and those that don't.
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# There are two types of form helpers: those that specifically work with model attributes and those that don't.
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# This helper deals with those that work with model attributes; to see an example of form helpers that don't work
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# with model attributes, check the ActionView::Helpers::FormTagHelper documentation.
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#
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# The core method of this helper, form_for, gives you the ability to create a form for a model instance;
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# The core method of this helper, form_for, gives you the ability to create a form for a model instance;
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# for example, let's say that you have a model <tt>Person</tt> and want to create a new instance of it:
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#
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# # Note: a @person variable will have been created in the controller.
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# # Note: a @person variable will have been created in the controller.
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# # For example: @person = Person.new
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# <% form_for :person, @person, :url => { :action => "create" } do |f| %>
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# <%= f.text_field :first_name %>
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@ -36,15 +35,15 @@ module ActionView
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# The <tt>params</tt> object created when this form is submitted would look like:
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#
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# {"action"=>"create", "controller"=>"persons", "person"=>{"first_name"=>"William", "last_name"=>"Smith"}}
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#
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#
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# The params hash has a nested <tt>person</tt> value, which can therefore be accessed with <tt>params[:person]</tt> in the controller.
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# If were editing/updating an instance (e.g., <tt>Person.find(1)</tt> rather than <tt>Person.new</tt> in the controller), the objects
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# 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).
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#
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#
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# If the object name contains square brackets the id for the object will be inserted. For example:
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#
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# <%= text_field "person[]", "name" %>
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#
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#
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# ...will generate the following ERb.
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#
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# <input type="text" id="person_<%= @person.id %>_name" name="person[<%= @person.id %>][name]" value="<%= @person.name %>" />
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@ -62,7 +61,7 @@ module ActionView
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# link:classes/ActionView/Helpers/DateHelper.html, and link:classes/ActionView/Helpers/ActiveRecordHelper.html
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module FormHelper
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# Creates a form and a scope around a specific model object that is used as a base for questioning about
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# values for the fields.
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# values for the fields.
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#
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# <% form_for :person, @person, :url => { :action => "update" } do |f| %>
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# First name: <%= f.text_field :first_name %>
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@ -71,13 +70,13 @@ module ActionView
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# Admin? : <%= f.check_box :admin %>
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# <% end %>
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#
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# 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>,
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# 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>,
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# not <tt><%= %></tt>. Also worth noting is that form_for yields a <tt>form_builder</tt> object, in this example as <tt>f</tt>, which emulates
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# the API for the stand-alone FormHelper methods, but without the object name. So instead of <tt>text_field :person, :name</tt>,
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# you get away with <tt>f.text_field :name</tt>.
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# you get away with <tt>f.text_field :name</tt>.
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#
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# Even further, the form_for method allows you to more easily escape the instance variable convention. So while the stand-alone
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# approach would require <tt>text_field :person, :name, :object => person</tt>
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# Even further, the form_for method allows you to more easily escape the instance variable convention. So while the stand-alone
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# approach would require <tt>text_field :person, :name, :object => person</tt>
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# to work with local variables instead of instance ones, the form_for calls remain the same. You simply declare once with
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# <tt>:person, person</tt> and all subsequent field calls save <tt>:person</tt> and <tt>:object => person</tt>.
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#
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@ -91,11 +90,11 @@ module ActionView
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# Admin? : <%= check_box_tag "person[admin]", @person.company.admin? %>
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# <% end %>
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#
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# Note: This also works for the methods in FormOptionHelper and DateHelper that are designed to work with an object as base.
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# Like FormOptionHelper#collection_select and DateHelper#datetime_select.
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# Note: This also works for the methods in FormOptionHelper and DateHelper that are designed to work with an object as base,
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# like FormOptionHelper#collection_select and DateHelper#datetime_select.
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#
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# HTML attributes for the form tag can be given as :html => {...}. For example:
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#
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#
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# <% form_for :person, @person, :html => {:id => 'person_form'} do |f| %>
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# ...
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# <% end %>
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@ -145,15 +144,15 @@ module ActionView
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# === Customized form builders
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#
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# You can also build forms using a customized FormBuilder class. Subclass FormBuilder and override or define some more helpers,
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# then use your custom builder. For example, let's say you made a helper to automatically add labels to form inputs.
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#
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# then use your custom builder. For example, let's say you made a helper to automatically add labels to form inputs.
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#
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# <% form_for :person, @person, :url => { :action => "update" }, :builder => LabellingFormBuilder do |f| %>
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# <%= f.text_field :first_name %>
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# <%= f.text_field :last_name %>
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# <%= text_area :person, :biography %>
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# <%= check_box_tag "person[admin]", @person.company.admin? %>
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# <% end %>
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#
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#
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# In many cases you will want to wrap the above in another helper, so you could do something like the following:
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#
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# def labelled_form_for(name, object, options, &proc)
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@ -188,7 +187,7 @@ module ActionView
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def apply_form_for_options!(object_or_array, options) #:nodoc:
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object = object_or_array.is_a?(Array) ? object_or_array.last : object_or_array
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html_options =
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if object.respond_to?(:new_record?) && object.new_record?
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{ :class => dom_class(object, :new), :id => dom_id(object), :method => :post }
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@ -208,7 +207,7 @@ module ActionView
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# <% form_for :person, @person, :url => { :action => "update" } do |person_form| %>
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# First name: <%= person_form.text_field :first_name %>
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# Last name : <%= person_form.text_field :last_name %>
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#
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#
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# <% fields_for :permission, @person.permission do |permission_fields| %>
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# Admin? : <%= permission_fields.check_box :admin %>
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# <% end %>
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@ -228,7 +227,7 @@ module ActionView
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# Returns a label tag tailored for labelling an input field for a specified attribute (identified by +method+) on an object
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# assigned to the template (identified by +object+). The text of label will default to the attribute name unless you specify
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# it explicitly. Additional options on the label tag can be passed as a hash with +options+. These options will be tagged
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# onto the html as an HTML element attribute as in the example shown.
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# onto the HTML as an HTML element attribute as in the example shown.
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#
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# ==== Examples
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# label(:post, :title)
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@ -246,7 +245,7 @@ module ActionView
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# Returns an input tag of the "text" type tailored for accessing a specified attribute (identified by +method+) on an object
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# assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
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# hash with +options+. These options will be tagged onto the html as an HTML element attribute as in the example
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# hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
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# shown.
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#
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# ==== Examples
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@ -268,7 +267,7 @@ module ActionView
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# Returns an input tag of the "password" type tailored for accessing a specified attribute (identified by +method+) on an object
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# assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
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# hash with +options+. These options will be tagged onto the html as an HTML element attribute as in the example
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# hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
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# shown.
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#
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# ==== Examples
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@ -290,7 +289,7 @@ module ActionView
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# Returns a hidden input tag tailored for accessing a specified attribute (identified by +method+) on an object
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# assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
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# hash with +options+. These options will be tagged onto the html as an html element attribute as in the example
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# hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
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# shown.
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#
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# ==== Examples
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@ -301,14 +300,14 @@ module ActionView
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# # => <input type="hidden" id="post_tag_list" name="post[tag_list]" value="#{@post.tag_list}" />
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#
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# hidden_field(:user, :token)
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# # => <input type="hidden" id="user_token" name="user[token]" value="#{@user.token}" />
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# # => <input type="hidden" id="user_token" name="user[token]" value="#{@user.token}" />
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def hidden_field(object_name, method, options = {})
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InstanceTag.new(object_name, method, self, nil, options.delete(:object)).to_input_field_tag("hidden", options)
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end
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# Returns an file upload input tag tailored for accessing a specified attribute (identified by +method+) on an object
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# assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
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# hash with +options+. These options will be tagged onto the html as an html element attribute as in the example
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# hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example
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# shown.
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#
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# ==== Examples
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@ -456,7 +455,7 @@ module ActionView
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end
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options["checked"] = "checked" if checked
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pretty_tag_value = tag_value.to_s.gsub(/\s/, "_").gsub(/\W/, "").downcase
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options["id"] ||= defined?(@auto_index) ?
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options["id"] ||= defined?(@auto_index) ?
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"#{@object_name}_#{@auto_index}_#{@method_name}_#{pretty_tag_value}" :
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"#{@object_name}_#{@method_name}_#{pretty_tag_value}"
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add_default_name_and_id(options)
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@ -510,11 +509,11 @@ module ActionView
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tag_text << " selected" if value
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tag_text << ">True</option></select>"
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end
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def to_content_tag(tag_name, options = {})
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content_tag(tag_name, value(object), options)
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end
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def object
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@object || (@template_object.instance_variable_get("@#{@object_name}") rescue nil)
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end
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@ -526,12 +525,12 @@ module ActionView
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def value_before_type_cast(object)
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self.class.value_before_type_cast(object, @method_name)
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end
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class << self
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def value(object, method_name)
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object.send method_name unless object.nil?
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end
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def value_before_type_cast(object, method_name)
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unless object.nil?
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object.respond_to?(method_name + "_before_type_cast") ?
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@ -539,7 +538,7 @@ module ActionView
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object.send(method_name)
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end
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end
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def check_box_checked?(value, checked_value)
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case value
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when TrueClass, FalseClass
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@ -554,7 +553,7 @@ module ActionView
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value.to_i != 0
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end
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end
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def radio_button_checked?(value, checked_value)
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value.to_s == checked_value.to_s
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end
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@ -604,9 +603,9 @@ module ActionView
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attr_accessor :object_name, :object, :options
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def initialize(object_name, object, template, options, proc)
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@object_name, @object, @template, @options, @proc = object_name, object, template, options, proc
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@object_name, @object, @template, @options, @proc = object_name, object, template, options, proc
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end
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(field_helpers - %w(label check_box radio_button fields_for)).each do |selector|
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src = <<-end_src
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def #{selector}(method, options = {})
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@ -628,19 +627,19 @@ module ActionView
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def check_box(method, options = {}, checked_value = "1", unchecked_value = "0")
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@template.check_box(@object_name, method, options.merge(:object => @object), checked_value, unchecked_value)
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end
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def radio_button(method, tag_value, options = {})
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@template.radio_button(@object_name, method, tag_value, options.merge(:object => @object))
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end
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def error_message_on(method, prepend_text = "", append_text = "", css_class = "formError")
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@template.error_message_on(@object, method, prepend_text, append_text, css_class)
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end
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end
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def error_messages(options = {})
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@template.error_messages_for(@object_name, options.merge(:object => @object))
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end
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def submit(value = "Save changes", options = {})
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@template.submit_tag(value, options.reverse_merge(:id => "#{object_name}_submit"))
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end
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