CODEWITHSUNDEEP
ruby-on-railsruby
Jeremy Lynch
Jeremy Lynch

Reputation: 7210

Using &block to pass html to method

How can I pass a block to a method. For example: 

# in the view
button(link) do
  '<div>html content</div>'
end

def button(&block)
  block
end

I have the following code which is working: 

# in helper file
def button(&block)
  link_to '/' do
      block.call.html_safe
  end
end


# in the view
button {'<div>html content</div>'}

Upvotes: 0

Views: 653

Answers (3)

Aleksei Matiushkin
Aleksei Matiushkin

Reputation: 121000

You are likely messing things up. What you are trying to achieve is easily achievable without any yield magic, with plain old good method parameter:

def button html
  link_to '/', html.html_safe
end

button '<div>html content</div>'

If one wants to yield a value from a block, do something with it and pass it further, one might:

def button
  raise unless block_given?
  λ = Proc.new
  link_to '/', &-> { λ.call.html_safe }
end

button { '<div>html content</div>' }

Upvotes: 2

Sergio Tulentsev
Sergio Tulentsev

Reputation: 230336

So, you just want to pass the block on to link_to? Do this.

def button(&block)
  link_to '/', &block
end

Upvotes: 3

lei liu
lei liu

Reputation: 2775

use yield:

def new_button(link)
  link_to link do
      yield.html_safe if block_given?
  end
end

Upvotes: 1

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