include bootstrap role attribute in rails form helper

问题

Twitter Bootstrap has this role attribute for forms:

<form role="form">

How can I include the role attribute in Rails form helpers? I tried this, but it doesn't work:

<%= form_for @user, class: "form-horizontal", role: "form" do |f| %>

回答1:

You need to specify it as an html option:

<%= form_for @user, html: {class: "form-horizontal", role: "form"} do |f| %>

回答2:

form_for and form_tag have to be used differently:

form_for:

<%= form_for @user, html: { class: "form-horizontal", role: "form" } do |f| %>

form_tag:

<%= form_tag some_path, class: "form-horizontal", role: "form" do |f| %>

来源：https://stackoverflow.com/questions/19622056/include-bootstrap-role-attribute-in-rails-form-helper