week 4 materials

Author: reneedv

week3/class_material/week3.key

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+Reading:
+  Chapter 6: Sections 4-6
+  Chapter 7: All
+  Chapter 9: Section 1
+  Chapter 11: Sections 9-11
+
+Code:
+  Add 2 relationships to your app:
+    1. Has Many (one-to-many)
+    2. Has Many Through (many-to-many)
+  Add 2 named scopes
+
+Questions:
+1. What is ActiveRecord and why is it useful?
+2. What problems could happen if you change a migration file after you have run it and committed it to github? (list 2)
+3. What problems can you run into with the Rails has_and_belongs_to_many method? (list 2)
+4. How is Rails form_for object oriented?
+5. How would I use postgres in production and sqlite for development? What files would I change and how would I change them?
+6. What is the seeds file? How do I run it?
+
+Link to code on Github:
+<please put the link to your code on github here>