title: Devise undefined method `build' for nil:NilClass
body: <p>I am currently enrolled in a online course in ruby on rails and im learning everything from scratch so pardon me if Im not clear in my questions. Here is my delima, I am trying to create a LINK between two Models in the rails application and here is what I have so far. However when I try to access localhost3000/business/new it returns the error mentioned it the title. I have come to the conclusion that it is because of me using a "has_one :model" type of association, rather than the "has_many :model". I hope someone can point me in the right direction here as I have spent hours searching to no solutions.</p>
  
  <pre><code>class BusinessesController &lt; ApplicationController
    before_action :set_business, only: [:show, :edit, :update, :destroy]
    //edited for clarity
    def new
      @business = current_user.business.build  //The line that returns a undefined method for nil class
    end
  
    def edit
    end
  
    def create
      @business = current_user.business.build(business_params)
  
      if @business.save
        redirect_to @business, notice: 'Business was successfully created.' 
      else
        render "new"
      end
    end
  </code></pre>
  
  <p>Devise User Model</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
    # Include default devise modules. Others available are:
    # :confirmable, :lockable, :timeoutable and :omniauthable
    devise :database_authenticatable, :registerable,
           :recoverable, :rememberable, :trackable, :validatable
  
    has_many :buzzs, dependent: :destroy
    has_one :business, dependent: :destroy
  end
  </code></pre>
  
  <p>Business Model</p>
  
  <pre><code>class Business &lt; ActiveRecord::Base
      belongs_to :user
  end
  </code></pre>