ERB "undefined local variable or method"

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May 18th, 2007, 10:01 PM

lotus_anima

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Join Date: Sep 2005

Posts: 2

Time spent in forums: 36 m 25 sec
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ERB "undefined local variable or method"

Here is a snippet of my Ruby...

Code:

  def serve_html(sock)
    browser = sock
    
    template = ERB.new(load_template_as_string('test.rhtml'), 0, '%<>')
    send_this = "Hello, world!"
    
    
    browser.write("HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n")
    browser.write(template.result)
    
    close_socket(sock)
  end

And here is a snippet from test.rhtml...

Code:

<body><%= send_this %></body>

But I get...

Code:

(erb):10: undefined local variable or method `send_this' for main:Object (NameError)

What gives? Mine is nearly identical to the ERB docs.

May 27th, 2007, 09:13 AM

voipfc

Registered User

Join Date: Oct 2006

Posts: 19

Time spent in forums: 3 h 49 m 40 sec
Reputation Power: 0

listing

PHP Code:


		
			
require 'erb'



  def serve_html(file)



    send_this = "Hello world 2"

    data = File.read(file)

    template = ERB.new(data, 0, '%<>')

    send_this = "Hello, world 3!"



    puts send_this

    puts("HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n")

    puts(template.result)





  end

send_this="Hello world 1!"

serve_html('test.rhtml')

execution

Quote:

Hello, world 3!
HTTP/1.0 200 OK
Content-type: text/html

<body>Hello world 1!</body>

Comment out the send_this="Hello world 1" at the end of the listing and the error will appear. It appears that when the puts is xecuted template.result is out of scope.

It has something to do with bindings - I am new to ruby - don't ask me why.

This is what I used to get your code to work. It involves something known as bindings and is in the ERb examples

PHP Code:


		
			
require 'erb'



  def serve_html(file)

    b = binding

    send_this = "Hello world"

    data = File.read(file)

    template = ERB.new(data, 0, '%<>')



    puts("HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n")

    puts(template.result(b))





  end

serve_html('test.rhtml')

Note the bracketed (b) in the template.result call.

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