Question

I’ve been staring at this for a while and Google hasn’t helped much so I’m turning to you guys for help. This should be a pretty simple fix.

The goal of the code is to take an email address from a sign up field and place it in the database.

I think most of what I need is there but I’m getting this error:

undefined method model_name for NilClass:Class

My home.html.erb file contains the following:

    <%= form_for(@signup) do |f| %>
        <div class="field">
            <%= f.label :email %><br />
            <%= f.text_field :email %>
        </div>

        <div class="actions">
            <%= f.submit "Enter" %>
        </div>
    <% end %>

The model contains this:

class Signup < ActiveRecord::Base

  attr_accessible :email
     email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
     validates(:email, :presence => true,
                    :length => {:maxiumum => 40},
                    :format => {:with => email_regex})

end

The controller contains:

class SignupController < ApplicationController

  def show
  end

  def new
    @signup = Signup.new
  end

  def create
    @signup = Signup.new(params[:id])
    if @signup.save
    else
      render 'new'
    end
  end

end

Answer 1

Add this to the home action in the pages controller:

@signup = Signup.new

The reason for the error is that you are using @signup in your form, but you didn’t define it in your show controller action.