Commit 364b273

@@ -11,6 +11,10 @@ class User < ActiveRecord::Base
     Digest::MD5::hexdigest(email.downcase)
   end
 
+  def to_param
+    username
+  end
+
   def self.authenticate(username,password)
     if user = User.where("email = :email OR username = :username", username: username, email: username).first
       user.authenticate(password)

@@ -88,33 +88,32 @@ describe User do
       expect(User::USERNAME_REGEX).to match("username1")
     end
   end
-  
+
   describe "#authenticate" do
     context "when credentials are correct" do
-      
       it "returns true" do
         user = create(:user, password: "password", password_confirmation: "password")
         expect(User.authenticate(user.email, "password")).to eql(user)
       end
-      
     end
-    
+
     context "when the email is not registered" do
-      
       it "returns nil" do
         expect(User.authenticate("sofake@noteven.com", "password")).to be_nil
       end
-      
     end
-    
+
     context "when the username is not registered" do
-      
       it "returns nil" do
         expect(User.authenticate("sofake", "password")).to be_nil
       end
-      
     end
-    
   end
-  
+
+  describe "#to_param" do
+    it "returns the username as the uniq identifier" do
+      user = build(:user)
+      expect(user.to_param).to eql(user.username)
+    end
+  end
 end