week_4_day_2_morning.rb

rails new projectname -d postgresql #1) creates a new poject using postgres by default; 
#2) Database.yml file, change the username and delete production and test databases; 
 rake db:create #3) Create the database 

rails is for high level stuff and rake is for tasks within your rails app; 

#The column name in the database is the attribute in the model; 
#Have 4 tabs running: bash, rails server, rails console, psql 

\c to connect to database in psql;

- There will be a database for each of the test, datbase and 

- REMEMBER THE APP CANNOT HAVE THE SAME NAME AS A MODEL; 

- rake db:drop #Removes the database; 

- rake -T #Shows all the tasks available in rake; 

gem list | grep annotate

Annoate gem looks at model and database and tells you info about the model from the database; 
annotate #Inside of the project 

gem 'protected-attributes' #bundle;

class Planet
  attr_accessible :name, :image, :orbit, :diameter, :mass, :moons #allowing us to mass assign (assigning things on mass) these attributes; 
end

reload! #To reload the console (when you are inside the console)

Planet.destory_all #Destroy all the plantes in the database; 

rake db:seed #Seed the database with data from the seed file; 

Planet.destroy_all #Put this at the top of the seeds file to clear the database before I input data; 

rails g migration create_planets #Create a migration file with a magic numbers with the exact time I generated the migration; 

def change #The change the migration makes for us; 
  create_table :planets do |t|
 
up #Added the table
down #Removed the table
change #Lets us go backwards or forwards #Dont use this, use change instead; 

rake db:migrate #created the table in the database; 
rake db:rollback #Undo the last migration
rake db:migrate

rails g migration AddBreathableToPlanets breathable:boolean

render :text => 'testing test test test'

raise params.inspect

In the form you need name="planet[name]" etc.....
Planet.create( params[:planet] ) #Create a brand new planet 

planet.update_attributes(params[:planet])

Planet.order(:orbit) #orders the plants by orbit; 

render 'christmasplanets' #christmasplanets.html

Larry Wall