title: undefined method `explain' for #<ActiveRecord::ConnectionAdapters::MysqlAdapter
body: <p>I'm new to Ruby on Rails, but I have followed some tutorials and know my way around a little bit. I have generated some scaffolding and inserted data into a MySql database.</p>
  
  <p>When navigating to index.html.erb I receive the error in the title</p>
  
  <p>The controller is executing index</p>
  
  <pre><code>  def index
      @beers = Beer.all
  
      respond_to do |format|
        format.html # index.html.erb
        format.json { render :json =&gt; @beers }
      end
    end
  </code></pre>
  
  <p>And has this as a structure</p>
  
  <pre><code>Beer: id, brewer_id, name, price, score, color, brew_type, create_at, updated_at
  </code></pre>
  
  <p>RoR is working for other scaffolding I have created, and listing data. I updated the structure in mysql for the entity Beer, and it probably hasn't reflected changes in rails (dunno).</p>
  
  <p>Do I need a different gem for connecting rails to a mysql db? Any advice on what to check for would be appreciated (:</p>