Module: ActionView::Helpers::FormTagHelper

Defined in:
lib/action_view/helpers/form_tag_helper.rb

Overview

Provides a number of methods for creating form tags that doesn’t rely on an ActiveRecord object assigned to the template like FormHelper does. Instead, you provide the names and values manually.

NOTE: The HTML options disabled, readonly, and multiple can all be treated as booleans. So specifying :disabled => true will give disabled="disabled".

Instance Method Summary collapse

Instance Method Details

#check_box_tag(name, value = "1", checked = false, options = {}) ⇒ Object

Creates a check box form input tag.

Options

  • :disabled - If set to true, the user will not be able to use this input.

  • Any other key creates standard HTML options for the tag.

Examples

check_box_tag 'accept'
# => <input id="accept" name="accept" type="checkbox" value="1" />

check_box_tag 'rock', 'rock music'
# => <input id="rock" name="rock" type="checkbox" value="rock music" />

check_box_tag 'receive_email', 'yes', true
# => <input checked="checked" id="receive_email" name="receive_email" type="checkbox" value="yes" />

check_box_tag 'tos', 'yes', false, :class => 'accept_tos'
# => <input class="accept_tos" id="tos" name="tos" type="checkbox" value="yes" />

check_box_tag 'eula', 'accepted', false, :disabled => true
# => <input disabled="disabled" id="eula" name="eula" type="checkbox" value="accepted" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 265

def check_box_tag(name, value = "1", checked = false, options = {})
  html_options = { "type" => "checkbox", "name" => name, "id" => name, "value" => value }.update(options.stringify_keys)
  html_options["checked"] = "checked" if checked
  tag :input, html_options
end

#field_set_tag(legend = nil, &block) ⇒ Object

Creates a field set for grouping HTML form elements.

legend will become the fieldset’s title (optional as per W3C).

Examples

<% field_set_tag do %>
  <p><%= text_field_tag 'name' %></p>
<% end %>
# => <fieldset><p><input id="name" name="name" type="text" /></p></fieldset>

<% field_set_tag 'Your details' do %>
  <p><%= text_field_tag 'name' %></p>
<% end %>
# => <fieldset><legend>Your details</legend><p><input id="name" name="name" type="text" /></p></fieldset>



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 381

def field_set_tag(legend = nil, &block)
  content = capture(&block)
  concat(tag(:fieldset, {}, true), block.binding)
  concat(content_tag(:legend, legend), block.binding) unless legend.blank?
  concat(content, block.binding)
  concat("</fieldset>", block.binding)
end

#file_field_tag(name, options = {}) ⇒ Object

Creates a file upload field. If you are using file uploads then you will also need to set the multipart option for the form tag:

<%= form_tag { :action => "post" }, { :multipart => true } %>
  <label for="file">File to Upload</label> <%= file_field_tag "file" %>
  <%= submit_tag %>
<%= end_form_tag %>

The specified URL will then be passed a File object containing the selected file, or if the field was left blank, a StringIO object.

Options

  • Creates standard HTML attributes for the tag.

  • :disabled - If set to true, the user will not be able to use this input.

Examples

file_field_tag 'attachment'
# => <input id="attachment" name="attachment" type="file" />

file_field_tag 'avatar', :class => 'profile-input'
# => <input class="profile-input" id="avatar" name="avatar" type="file" />

file_field_tag 'picture', :disabled => true
# => <input disabled="disabled" id="picture" name="picture" type="file" />

file_field_tag 'resume', :value => '~/resume.doc'
# => <input id="resume" name="resume" type="file" value="~/resume.doc" />

file_field_tag 'user_pic', :accept => 'image/png,image/gif,image/jpeg'
# => <input accept="image/png,image/gif,image/jpeg" id="user_pic" name="user_pic" type="file" /> 

file_field_tag 'file', :accept => 'text/html', :class => 'upload', :value => 'index.html'
# => <input accept="text/html" class="upload" id="file" name="file" type="file" value="index.html" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 170

def file_field_tag(name, options = {})
  text_field_tag(name, nil, options.update("type" => "file"))
end

#form_tag(url_for_options = {}, options = {}, *parameters_for_url, &block) ⇒ Object

Starts a form tag that points the action to an url configured with url_for_options just like ActionController::Base#url_for. The method for the form defaults to POST.

Options

  • :multipart - If set to true, the enctype is set to “multipart/form-data”.

  • :method - The method to use when submitting the form, usually either “get” or “post”.

    If "put", "delete", or another verb is used, a hidden input with name _method 
is added to simulate the verb over post.

  • A list of parameters to feed to the URL the form will be posted to.

Examples

form_tag('/posts')                      
# => <form action="/posts" method="post">

form_tag('/posts/1', :method => :put)   
# => <form action="/posts/1" method="put">

form_tag('/upload', :multipart => true) 
# => <form action="/upload" method="post" enctype="multipart/form-data">

<% form_tag '/posts' do -%>
  <div><%= submit_tag 'Save' %></div>
<% end -%>
# => <form action="/posts" method="post"><div><input type="submit" name="submit" value="Save" /></div></form>



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 36

def form_tag(url_for_options = {}, options = {}, *parameters_for_url, &block)
  html_options = html_options_for_form(url_for_options, options, *parameters_for_url)
  if block_given?
    form_tag_in_block(html_options, &block)
  else
    form_tag_html(html_options)
  end
end

#hidden_field_tag(name, value = nil, options = {}) ⇒ Object

Creates a hidden form input field used to transmit data that would be lost due to HTTP’s statelessness or data that should be hidden from the user.

Options

  • Creates standard HTML attributes for the tag.

Examples

hidden_field_tag 'tags_list'
# => <input id="tags_list" name="tags_list" type="hidden" />

hidden_field_tag 'token', 'VUBJKB23UIVI1UU1VOBVI@'
# => <input id="token" name="token" type="hidden" value="VUBJKB23UIVI1UU1VOBVI@" />

hidden_field_tag 'collected_input', '', :onchange => "alert('Input collected!')"
# => <input id="collected_input" name="collected_input" onchange="alert('Input collected!')" 
#    type="hidden" value="" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 133

def hidden_field_tag(name, value = nil, options = {})
  text_field_tag(name, value, options.stringify_keys.update("type" => "hidden"))
end

#image_submit_tag(source, options = {}) ⇒ Object

Displays an image which when clicked will submit the form.

source is passed to AssetTagHelper#image_path

Options

  • :disabled - If set to true, the user will not be able to use this input.

  • Any other key creates standard HTML options for the tag.

Examples

image_submit_tag("login.png")
# => <input src="/images/login.png" type="image" />

image_submit_tag("purchase.png"), :disabled => true
# => <input disabled="disabled" src="/images/purchase.png" type="image" />

image_submit_tag("search.png"), :class => 'search-button'
# => <input class="search-button" src="/images/search.png" type="image" />

image_submit_tag("agree.png"), :disabled => true, :class => "agree-disagree-button"
# => <input class="agree-disagree-button" disabled="disabled" src="/images/agree.png" type="image" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 363

def image_submit_tag(source, options = {})
  tag :input, { "type" => "image", "src" => path_to_image(source) }.update(options.stringify_keys)
end

#password_field_tag(name = "password", value = nil, options = {}) ⇒ Object

Creates a password field, a masked text field that will hide the users input behind a mask character.

Options

  • :disabled - If set to true, the user will not be able to use this input.

  • :size - The number of visible characters that will fit in the input.

  • :maxlength - The maximum number of characters that the browser will allow the user to enter.

  • Any other key creates standard HTML attributes for the tag.

Examples

password_field_tag 'pass'
# => <input id="pass" name="pass" type="password" />

password_field_tag 'secret', 'Your secret here'
# => <input id="secret" name="secret" type="password" value="Your secret here" />

password_field_tag 'masked', nil, :class => 'masked_input_field'
# => <input class="masked_input_field" id="masked" name="masked" type="password" />

password_field_tag 'token', '', :size => 15
# => <input id="token" name="token" size="15" type="password" value="" />

password_field_tag 'key', nil, :maxlength => 16
# => <input id="key" maxlength="16" name="key" type="password" />

password_field_tag 'confirm_pass', nil, :disabled => true
# => <input disabled="disabled" id="confirm_pass" name="confirm_pass" type="password" />

password_field_tag 'pin', '1234', :maxlength => 4, :size => 6, :class => "pin-input"
# => <input class="pin-input" id="pin" maxlength="4" name="pin" size="6" type="password" value="1234" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 203

def password_field_tag(name = "password", value = nil, options = {})
  text_field_tag(name, value, options.update("type" => "password"))
end

#radio_button_tag(name, value, checked = false, options = {}) ⇒ Object

Creates a radio button; use groups of radio buttons named the same to allow users to select from a group of options.

Options

  • :disabled - If set to true, the user will not be able to use this input.

  • Any other key creates standard HTML options for the tag.

Examples

radio_button_tag 'gender', 'male'
# => <input id="gender_male" name="gender" type="radio" value="male" />

radio_button_tag 'receive_updates', 'no', true
# => <input checked="checked" id="receive_updates_no" name="receive_updates" type="radio" value="no" />

radio_button_tag 'time_slot', "3:00 p.m.", false, :disabled => true
# => <input disabled="disabled" id="time_slot_300_pm" name="time_slot" type="radio" value="3:00 p.m." />

radio_button_tag 'color', "green", true, :class => "color_input"
# => <input checked="checked" class="color_input" id="color_green" name="color" type="radio" value="green" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 290

def radio_button_tag(name, value, checked = false, options = {})
  pretty_tag_value = value.to_s.gsub(/\s/, "_").gsub(/(?!-)\W/, "").downcase
  pretty_name = name.to_s.gsub(/\[/, "_").gsub(/\]/, "")
  html_options = { "type" => "radio", "name" => name, "id" => "#{pretty_name}_#{pretty_tag_value}", "value" => value }.update(options.stringify_keys)
  html_options["checked"] = "checked" if checked
  tag :input, html_options
end

#select_tag(name, option_tags = nil, options = {}) ⇒ Object

Creates a dropdown selection box, or if the :multiple option is set to true, a multiple choice selection box.

Helpers::FormOptions can be used to create common select boxes such as countries, time zones, or associated records. option_tags is a string containing the option tags for the select box.

Options

  • :multiple - If set to true the selection will allow multiple choices.

  • :disabled - If set to true, the user will not be able to use this input.

  • Any other key creates standard HTML attributes for the tag.

Examples

select_tag "people", "<option>David</option>"
# => <select id="people" name="people"><option>David</option></select>

select_tag "count", "<option>1</option><option>2</option><option>3</option><option>4</option>"
# => <select id="count" name="count"><option>1</option><option>2</option>
#    <option>3</option><option>4</option></select>

select_tag "colors", "<option>Red</option><option>Green</option><option>Blue</option>", :multiple => true
# => <select id="colors" multiple="multiple" name="colors"><option>Red</option>
#    <option>Green</option><option>Blue</option></select>

select_tag "locations", "<option>Home</option><option selected="selected">Work</option><option>Out</option>"
# => <select id="locations" name="locations"><option>Home</option><option selected='selected'>Work</option>
#    <option>Out</option></select>

select_tag "access", "<option>Read</option><option>Write</option>", :multiple => true, :class => 'form_input'
# => <select class="form_input" id="access" multiple="multiple" name="access"><option>Read</option>
#    <option>Write</option></select>

select_tag "destination", "<option>NYC</option><option>Paris</option><option>Rome</option>", :disabled => true
# => <select disabled="disabled" id="destination" name="destination"><option>NYC</option>
#    <option>Paris</option><option>Rome</option></select>



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 79

def select_tag(name, option_tags = nil, options = {})
  content_tag :select, option_tags, { "name" => name, "id" => name }.update(options.stringify_keys)
end

#submit_tag(value = "Save changes", options = {}) ⇒ Object

Creates a submit button with the text value as the caption.

Options

  • :disabled - If set to true, the user will not be able to use this input.

  • :disable_with - Value of this parameter will be used as the value for a disabled version 

    of the submit button when the form is submitted.

  • Any other key creates standard HTML options for the tag.

Examples

submit_tag
# => <input name="commit" type="submit" value="Save changes" />

submit_tag "Edit this article"
# => <input name="commit" type="submit" value="Edit this article" />

submit_tag "Save edits", :disabled => true
# => <input disabled="disabled" name="commit" type="submit" value="Save edits" />

submit_tag "Complete sale", :disable_with => "Please wait..."
# => <input name="commit" onclick="this.disabled=true;this.value='Please wait...';this.form.submit();" 
#    type="submit" value="Complete sale" />

submit_tag nil, :class => "form_submit"
# => <input class="form_submit" name="commit" type="submit" />

submit_tag "Edit", :disable_with => "Editing...", :class => 'edit-button'
# => <input class="edit-button" disable_with="Editing..." name="commit" type="submit" value="Edit" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 325

def submit_tag(value = "Save changes", options = {})
  options.stringify_keys!
  
  if disable_with = options.delete("disable_with")
    options["onclick"] = [
      "this.setAttribute('originalValue', this.value)",
      "this.disabled=true",
      "this.value='#{disable_with}'",
      "#{options["onclick"]}",
      "result = (this.form.onsubmit ? (this.form.onsubmit() ? this.form.submit() : false) : this.form.submit())",
      "if (result == false) { this.value = this.getAttribute('originalValue'); this.disabled = false }",
      "return result",
    ].join(";")
  end
    
  tag :input, { "type" => "submit", "name" => "commit", "value" => value }.update(options.stringify_keys)
end

#text_area_tag(name, content = nil, options = {}) ⇒ Object

Creates a text input area; use a textarea for longer text inputs such as blog posts or descriptions.

Options

  • :size - A string specifying the dimensions (columns by rows) of the textarea (e.g., “25x10”).

  • :rows - Specify the number of rows in the textarea

  • :cols - Specify the number of columns in the textarea

  • :disabled - If set to true, the user will not be able to use this input.

  • Any other key creates standard HTML attributes for the tag.

Examples

text_area_tag 'post'
# => <textarea id="post" name="post"></textarea>

text_area_tag 'bio', @user.bio
# => <textarea id="bio" name="bio">This is my biography.</textarea>

text_area_tag 'body', nil, :rows => 10, :cols => 25
# => <textarea cols="25" id="body" name="body" rows="10"></textarea>

text_area_tag 'body', nil, :size => "25x10"
# => <textarea name="body" id="body" cols="25" rows="10"></textarea>

text_area_tag 'description', "Description goes here.", :disabled => true
# => <textarea disabled="disabled" id="description" name="description">Description goes here.</textarea>

text_area_tag 'comment', nil, :class => 'comment_input'
# => <textarea class="comment_input" id="comment" name="comment"></textarea>



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 234

def text_area_tag(name, content = nil, options = {})
  options.stringify_keys!

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

  content_tag :textarea, content, { "name" => name, "id" => name }.update(options.stringify_keys)
end

#text_field_tag(name, value = nil, options = {}) ⇒ Object

Creates a standard text field; use these text fields to input smaller chunks of text like a username or a search query.

Options

  • :disabled - If set to true, the user will not be able to use this input.

  • :size - The number of visible characters that will fit in the input.

  • :maxlength - The maximum number of characters that the browser will allow the user to enter.

  • Any other key creates standard HTML attributes for the tag.

Examples

text_field_tag 'name'
# => <input id="name" name="name" type="text" />

text_field_tag 'query', 'Enter your search query here'
# => <input id="query" name="query" type="text" value="Enter your search query here" />

text_field_tag 'request', nil, :class => 'special_input'
# => <input class="special_input" id="request" name="request" type="text" />

text_field_tag 'address', '', :size => 75
# => <input id="address" name="address" size="75" type="text" value="" />

text_field_tag 'zip', nil, :maxlength => 5
# => <input id="zip" maxlength="5" name="zip" type="text" />

text_field_tag 'payment_amount', '$0.00', :disabled => true
# => <input disabled="disabled" id="payment_amount" name="payment_amount" type="text" value="$0.00" />

text_field_tag 'ip', '0.0.0.0', :maxlength => 15, :size => 20, :class => "ip-input"
# => <input class="ip-input" id="ip" maxlength="15" name="ip" size="20" type="text" value="0.0.0.0" />



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# File 'lib/action_view/helpers/form_tag_helper.rb', line 113

def text_field_tag(name, value = nil, options = {})
  tag :input, { "type" => "text", "name" => name, "id" => name, "value" => value }.update(options.stringify_keys)
end