Rails: Basics

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#Models
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#Create a Model
$ ruby script/generate model ClassName attribute_name:attribute_type attribute_name:attribute_type
 
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#Controllers
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#Create a Controller
$ ruby script/generate controller ClassName action1 action2
 
#Remove a Controller
$ ruby script/destroy controller ClassName action1 action2
 
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#Server
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#Start an application
$ script/server
 
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#Migrations
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#Migrate does these 3 things
#1. Checks the database for the unique number of the migration is most recent
#2. It steps through the migrations that have not yet been applied, one at a time.
#3. The Self.up method is executed for each migration
$ rake db:migrate
 
#Rollback a Migration
$ rake db:migrate VERSION=n
 
#Retrieving Records by ID, not recommended but at times helpful
ModelName = (Most likely TableName)
IRB>> ModelName.find(#id)
IRB>> ModelName.find(:all)
 
#Retrive the Last Record
IRB>> ModelName.find(:all).last (Resource Intensive)
IRB>> ModelName.find(:first, :order => 'id DESC') (Resource Efficient)