User.create(name: "David", occupation: "Code Artist")

User.save

self.table_name

user = User.new

Convention

over Configuration

Active Support

DRY Principal (Don’t Repeat

Yourself)

Scaffolding

is

a highly customizable software

that’s developed specifically

for the needs of a particular

organization

is

is

the ability to access all information from a single HTML page

render  doesn’t run any code in the

target action, redirect_to is a way to handle returning responses to an HTTP

request

redirect_to 

doesn’t run any code in the target action, render is a way to handle

returning responses to an HTTP request

render

doesn’t

run any code in the target action, redirect_to is as a sort of goto command

member block

member route

photos route

preview route

before, after, around

after, belong, around

before, after, belong

view validation

controller-level validations

database-level validations

client-side validations

model-level validations

connect

options

trace

put

set

patch

polymorphism.

inheritance.

encapsulation.

abstraction.

can

set access levels of named methods by listing them as arguments.

allows

multiple inheritance from several types and classes.

allows

you to have public getters and setters for instance variables.

can

work with objects of multiple types and classes at once.