add voting on topics

Author: joelbyler

readme.md

@@ -1,3 +1,6 @@
+__IMPORTANT__: this material has been adapted from [railsbridge.org](http://docs.railsbridge.org/intro-to-rails/) to work on the [cloud9 IDE](http://c9.io)
+
+
 # Intro To Rails
 
 ## Goal

setting_the_default_page.md

@@ -67,4 +67,4 @@ $ rails console
 `app` is a special object that represents your entire application. You can ask it about its routes (as we just did), play with its database connections, or make pseudo-web requests against it with `get` or `post` (and lots more).
 
 ## Next Step:
-Go on to Voting On Topics
+Go on to [Voting On Topics](voting_on_topics.md)

voting_on_topics.md

@@ -0,0 +1,25 @@
+# Voting On Topics
+
+## Goals
+* Create a model for votes
+
+Votes    |
+---------|
+id       |
+topic_id |
+
+Every topic in suggestotron can be voted on. In order to count votes, we need to record votes. We'll add that table now.
+
+## Steps
+Type this in the terminal (bash):
+```bash
+rails generate model vote topic_id:integer
+rake db:migrate
+```
+## Explanation
+* Just like before, we're creating a new model named "vote"
+* The only thing really different is the integer we added called `topic_id`.
+* `topic_id` is the data we need to draw the line between votes and topics.
+* We didn't generate a full scaffold this time because we aren't going to do the full CRUD for votes; they're just going to be considered part of topics as-is.
+## Next Step:
+Go on to Hooking Up Votes And Topics