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 conventions with an object assigned to the template like FormHelper does. With the FormTagHelper, you provide the names and values yourself.

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.



110
111
112
113
114
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 110

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

#end_form_tag ⇒ Object

Outputs “</form>”



33
34
35
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 33

def end_form_tag
  "</form>"
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:

<%= 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.



82
83
84
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 82

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) ⇒ Object Also known as: start_form_tag

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”.



18
19
20
21
22
23
24
25
26
27
28
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 18

def form_tag(url_for_options = {}, options = {}, *parameters_for_url)
  html_options = { "method" => "post" }.merge(options.stringify_keys)

  if html_options["multipart"]
    html_options["enctype"] = "multipart/form-data"
    html_options.delete("multipart")
  end

  html_options["action"] = url_for(url_for_options, *parameters_for_url)
  tag("form", html_options, true)
end

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

Creates a hidden field.

Takes the same options as text_field_tag



68
69
70
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 68

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



131
132
133
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 131

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

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

Creates a password field.

Takes the same options as text_field_tag



89
90
91
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 89

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.



117
118
119
120
121
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 117

def radio_button_tag(name, value, checked = false, options = {})
  html_options = { "type" => "radio", "name" => name, "id" => name, "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:

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

Options:

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



49
50
51
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 49

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.



124
125
126
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 124

def submit_tag(value = "Save changes", options = {})
  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.

Options:

  • :size - A string specifying the dimensions of the textarea.

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



99
100
101
102
103
104
105
106
107
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 99

def text_area_tag(name, content = nil, options = {})
  options = options.stringify_keys
  if options["size"]
    options["cols"], options["rows"] = options["size"].split("x")
    options.delete("size")
  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.

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.

A hash of standard HTML options for the tag.



61
62
63
 
# File 'lib/action_view/helpers/form_tag_helper.rb', line 61

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