start ch2
Adding post model and controller, add resources in the routes.rb file
Add relation ship between two models
ch2.1.1 fetch posts out in the group controller
complete ch2.1.1, show posts in every group page
merge ch2.1.1
ch2.1.2 create new in post controller
add new action into posts_controller
Add a view for posts new
Add missed @ sign
merge ch2.1.2
ch2.1.3 add create method into posts_controller
Add create method
Add required field check
merge ch2.1.3
ch2.1.4 create edit for posts
Add edit method(action)
Add edit form view
merge ch2.1.4
ch2.1.5 add update into posts controller