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PONameError: uninitialized constant User::SCREEN_NAME_RANGE
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  1. PONameError: uninitialized constant User::SCREEN_NAME_RANGE
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    copied!<p>So according to the tutorial on Railsspace, I am suppose to use the console to understand Active Records. So I do what that things says I should do and this is the result I get. </p> <p>Does anyone know where the problem is? </p> <pre><code> $ rails console </code></pre> <p>Output</p> <pre><code>Loading development environment (Rails 3.0.10) ruby-1.9.2-p290 :001 &gt; user = User.new(:screen_name =&gt; "me", ruby-1.9.2-p290 :002 &gt; :email =&gt; "", ruby-1.9.2-p290 :003 &gt; :password =&gt; "a",) NameError: uninitialized constant User::SCREEN_NAME_RANGE from /Users/dennisbuizert/Sites/gpoff/app/models/user.rb:3:in `&lt;class:User&gt;' from /Users/dennisbuizert/Sites/gpoff/app/models/user.rb:1:in `&lt;top (required)&gt;' from (irb):1 from /Users/dennisbuizert/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.10/lib/rails/commands/console.rb:44:in `start' from /Users/dennisbuizert/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.10/lib/rails/commands/console.rb:8:in `start' from /Users/dennisbuizert/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.10/lib/rails/commands.rb:23:in `&lt;top (required)&gt;' from script/rails:6:in `require' from script/rails:6:in `&lt;main&gt;' </code></pre> <p>User model</p> <pre><code> class User &lt; ActiveRecord::Base validates_uniqueness_of :screen_name, :email validates_length_of :screen_name, :within =&gt; SCREEN_NAME_RANGE validates_length_of :password, :within =&gt; PASSWORD_RANGE validates_length_of :email, :maximum =&gt; EMAIL_MAX_LENGTH validates_presence_of :email # Max &amp; Min length for all fields SCREEN_NAME_MIN_LENGTH = 3 SCREEN_NAME_MAX_LENGTH = 20 PASSWORD_MIN_LENGTH = 8 PASSWORD_MAX_LENGTH = 26 EMAIL_MAX_LENGTH = 50 SCREEN_NAME_RANGE = SCREEN_NAME_MIN_LENGHT..SCREEN_NAME_MAX_LENGTH PASSWORD_RANGE = PASSWORD_MIN_LENGHT..PASSWORD_MAX_LENGTH end </code></pre> <p>I am using SQLite3 rather than MySQL, because I cannot figure out how to replace SQLite3 with mysql and how to get that working.</p>
 

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