title: NoMethodError (undefined method `[]' for nil:NilClass)
body: <p>I have a very odd instance of this error:</p>
  
  <pre><code>NoMethodError (undefined method `[]' for nil:NilClass):
  app/controllers/main_controller.rb:150:in `block in find_data_label'
  app/controllers/main_controller.rb:149:in `each'
  app/controllers/main_controller.rb:149:in `find_data_label'
  app/controllers/main_controller.rb:125:in `data_string'
  app/controllers/main_controller.rb:35:in `catch'
  </code></pre>
  
  <p>Whats weird is that the line 150, where it says the error is, is inside a loop and executes perfectly 11 times before it decides to error out. I am out of ideas as to why it would work  fine but fail one line before what would effective be the loop where the if statement returns true.</p>
  
  <p>This is the code:</p>
  
  <pre><code>  def find_data_label(label)
      @fields.each do |f|
        puts "f[:field_data]['Title'] = #{f[:field_data]['Title']}" # &lt;--- line 150
        if f[:field_data]['Title'] == label
          return f
        end
      end
    end
  </code></pre>
  
  <p>And this is the output before I get the error:</p>
  
  <pre><code>f[:field_data]['Title'] = Name
  f[:field_data]['Title'] = Name
  f[:field_data]['Title'] = Mobile number
  f[:field_data]['Title'] = Email
  f[:field_data]['Title'] = Date of birth
  f[:field_data]['Title'] = Gender
  f[:field_data]['Title'] = Street name
  f[:field_data]['Title'] = Street number
  f[:field_data]['Title'] = My local Puckles store is in
  f[:field_data]['Title'] = Suburb
  f[:field_data]['Title'] = Postcode
  Completed 500 Internal Server Error in 2047ms
  </code></pre>
  
  <p>Thanks in advance for any help.</p>