Comparing FormTagHelper, FormHelper, FormBuilder

form_for.md

form_for @obj, url: {action: 'create', type: @type}

• http://stackoverflow.com/questions/1549055/rails-pass-parameters-with-render-action

formtaghelper-formhelper-formbuilder.md

Refs

• ActionView::Helpers::FormTagHelper
• [ActionView::Helpers::FormHelper]
• ActionView::Helpers::FormOptionsHelper
• ActionView::Helpers::FormBuilder

hidden_tag.md

ActionView::Helpers::FormTagHelper

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

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

Output

<input id="tags_list" name="tags_list" type="hidden" />

ActionView::Helpers::FormHelper

def hidden_field(object_name, method, options = {})
    Tags::HiddenField.new(object_name, method, self, options).render
end

Output:

<input type="hidden" id="post_tag_list" name="post[tag_list]" value="#{@post.tag_list}" />

ActionView::Helpers::FormBuilder

def hidden_field(method, options = {})
  @emitted_hidden_id = true if method == :id
  @template.hidden_field(@object_name, method, objectify_options(options))
end

select.markdown

FormTagHelper

select_tag(name, option_tags = nil, options = {})

FormOptionsHelper

select(object, method, choices = nil, options = {}, html_options = {}, &block)

FormBuilder

select(method, choices = nil, options = {}, html_options = {}, &block)