I am new to rails. I read some examples and don't understand rails erb
syntax. There is a piece of code I am not familiar:
<% form_for(@bay_info) do |f| %>
<%= f.error_messages %>
<%= f.label :HostName %><br />
<%= f.text_field :HostName %>
I wander what f mean. What is its type? How can I find its definition?