Rails将表单包含在

<%= form_tag("/search", method: "get") do %>
  <%= text_field_tag(:query) %>
  <%= submit_tag("Search") %>
<% end %>

<%= form_for(@user) do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  
  <%= f.label :email %>
  <%= f.email_field :email %>
  
  <%= f.submit %>
<% end %>

<%= form_with(model: @user, local: true) do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  
  <%= f.label :email %>
  <%= f.email_field :email %>
  
  <%= f.submit %>
<% end %>

<%= form_with(model: @user, scope: :user) do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  
  <%= f.fields_for :address do |address_fields| %>
    <%= address_fields.label :street %>
    <%= address_fields.text_field :street %>
  <% end %>
  
  <%= f.submit %>
<% end %>