CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-4
Catalin
Catalin

Reputation: 851

how can I verify if variable is passed to template?

This is the situation:

application.html.erb

<html>
<title><%= yield(:title) + ' | ' if :title.present? %> Website Name</title>
....

home.html.erb

<% provide(:title, 'Home') %>

So I want to print a specific page title only if such a title is provided via provide.

But it seems that all methods tried return the same thing either the variable :title is provided or not

>> defined? :title
=> "expression"
>> defined? :anything
=> "expression"
>> :title.present?
=> true
>> :anything.present?
=> true
>> :title.nil?
=> false
>> :anything.nil?
=> false

Upvotes: 0

Views: 65

Answers (1)

bkunzi01
bkunzi01

Reputation: 4561

I find the most convenient way is to add this to your application_helper.rb file:

  def full_title(page_title)
  full_title = "Your Site Title"
    if page_title.empty?
      full_title
    else
      "#{full_title} | #{page_title}"
    end    
  end

Then on each page view you can put at the top something like:

<%= provide(:title, "My About Section") %>

And then in your application/layout view in the head section you can call it via:

<title><%=full_title(yield(:title))%></title>

This leaves the method "full_title" to check if anything was provided instead of logic in your application layout view.

Upvotes: 1

Related Questions