eduardo.txt

from terminal:

rails new penceme

brew install imagemagick


1) User model
 - email
 - username
 - password
 
 
 1) validates the presence
 2) validates the format of the email field
 3) validates that the password has length > 5
 4) validates that the username is unique
  5) validates that the username is unique
  
  
  validates :field_name, :validation_type => validation attributes 
  
      validates :username, :presence => true
      
      
      :presence,
      :uniqueness,
      :length => {:minimum => number }
      
      
      
      
      :format => a regular expression
      
      
      /[h-b]ello/ => [hello, bello]
      
      
      [email protected]
      [email protected]
      
      def is_valid_email(email)
         # return true if email is correct
         # return false if email is not correct
         
         if it has en ampersand
            if it has a dot after the ampersand
               its a valid email
         else
              it is not a valid email
      end
      
      is_valid_email("pir!/"T!/£"[email protected]") => true
      is_valid_email("fuck you") => false
      
      
      /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
      
      
      rails has many controllers
         a controller has many actions
         
      
      connect the url "/login" with the new action inside the sessions controller
      
      ->>>>>>>    HERE
      
      
      models: the DATA!!! in this case: the User model /app/models/user
      controllers: are parts of CODE that connect ROUTES to ACTIONS
         ROUTES are "/login", "/products/new" these are all URLS
      views: are the HTML
      
      
      
when I go to /login

in ROUTES

"login" is matched to "sessions" controller, "new" action

IN CONTROLLERS

"new" action renders the "new" view (new.html.erb)

IN VIEWS
  "new" is shown the web page 


FORMS

forms have 1 or more FIELDS
   each FIELD has an input
   each FIELD has an IDENTIFIER (ID)

Each form has a SUBMIT button
FORMS has a URL to post information to




    <%= form_tag "/login" do %>
        <%= label_tag :email %></br>
        <%= text_field_tag :email %> </br>

        <%= label_tag :password %></br>
        <%= password_field_tag :password %></br>

        <%= submit_tag "Login" %></br>
    <% end %>


render :text => params.to_s


def authenticate
  # Get the email address from the login form
  email = params[:email]
  
  # Get the password from the login form
  password = params[:password]
  
  
  # Get the user from the DATABASE, using the User model defined in user.rb
  user = User.find_by_email(email)
  
  # if the user does not exist, render an invalid text
  
  if user is null
    render :text => "No user with this email..."
  end
  
  # Check that the password of the user model is the same as the password in the parameters (defined on L121)
  
  if user.password == password
    render :text => "Woohoo!"
  else
    render :text => "Invalid information"
  end
  
end

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# HOMEWORKS

PART 1) modify the sessions#authenticate
  if AUTH is valid:
    render the "valid" view

  if AUTH is invalid
    render the "invalid" view

PART 2) create a new routes, a new controller and a new view
create a new URL called /hello, that connects to "hello#world" ("Hello" controller, "World" action),
that renders the :world view 

PART 3) familiarize with authentication, the stuff that I did for you
FAMILIARIZE and USE https://github.com/PirosB3/eduardo_proj
 - create a new user through the terminal
 - login throught /login URL