CODEWITHSUNDEEP
ruby-on-railsrubyerb
Benjamin Cheah
Benjamin Cheah

Reputation: 1401

How do I yield from an ERB code block without rendering it?

Consider the following:

view.html.erb:

<%= make_backwards do %>
  stressed
<% end %>

helper.rb:

def make_backwards
  yield.reverse
end

The view renders stresseddesserts instead of just desserts. How do I use the content in yield without rendering the code block?

Upvotes: 7

Views: 1380

Answers (2)

Damien MATHIEU
Damien MATHIEU

Reputation: 32629

ERB has an internal buffer, which makes using blocks a bit more complicated, as you can see in your code example.

Rails provides a capture method, which allows you to capture a string inside this buffer and return it from a block.

So your helper would become the following:

def make_backwards
  capture do
    yield.reverse
  end
end

Upvotes: 5

Gjaldon
Gjaldon

Reputation: 5644

You could try doing the ff:

Option 1:

<%= make_backwards { "stressed" } %>

Option 2:

<%= make_backwards do %>
  <% "stressed" %>
<% end %>

Let me know if it helps.

Upvotes: 1

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