Tealeaf Rails Rapid Prototyping with Ruby on Rails - Lesson 1 Quiz

gistfile1.rb

1. The data is store in table which have an unique identifier, usually call primary id, 
    also it is posible to create relathionship between tables through this primary key.
2. SQL(Structured Query Language) is the language to acces the tables in our databases to 
    insert, extract, delete or update.
3. There are Data and Schema, schema is a way to represent the different tables in our DataBase
    what type of data and the name of the columns. And Data show the data, inside the tables,
    every Database has it own schema.
4.  Primary Key
5.  A foreign Key is an identifier inside of a table that refers to another table.
6.  ActiveRecord connects the rich objects of an application to tables in a relational database management. 
7.  crazy_monkies
8.  The froeign key will be in the issue model. The association will be Project has_many :issues and Issue  belongs_to :project
9.  
    class Animal < ActiveRecord::Base
      belongs_to :zoo
    end
    
    The schema show that table animals has the foreign_key zoo_id
    
    zoo.animals
    zoo.animals.all
    zoo.animals.first
    zoo.animals.last
    zoo.animals.size
    zoo.animals.each
    zoo.animals.map
    
    z = Zoo.create(name: "San Diego Zoo")
    z.animals << Animal.create(name: "jumpster")
    
10. Strong Parameters
11. return the first animal
12. Animal.create(name: "Joe")
    and the method that svae are save, save!, create, create!.
13. With a join table which have both foreign_keys
14. Has many through and Has and belongs to many. Has many through need a join table which allow us to save extra data inside the data 
    with habtm don't allow to save extra data because there are no join table inside the Database.
15.  
    g =   Group.create
    g.users.create