This markdown will be covering the basics of partials. Also known as “partial templates”, partials allow you to move the code for rendering a partial piece of a code into a separate file.
These are indicated by an underscore in front of the view file name, for example _form.html.erb
Lets say that we had this example code:
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h1>Sign up!</h1>
<%= form_for @user do |f|%>
First name: <%= f.text_field :f_name %><br />
Last last: <%= f.text_field :l_name %><br />
E-mail: <%= f.text_field :email %><br />
Password: <%= f.password_field :password %><br />
Password confirmation: <%= f.password_field :password_confirmation %><br />
<%=f.submit %>
<% end %>
</body>
</html>If other information along with this form the page could begin to look a bit busy. We could use a partial to clean it up.
We would make a new partial file in the layouts folder so that way it would be available on multiple pages.
The same html with a partial would look something like:
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h1>Sign up!</h1>
<%= render 'form' %>
</body>
</html>Notice that when we render the form we use the syntax, render with form (the name of the partial) in ticks.
That is a basic way to make your projects more DRY using partials.
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