all

Question 1

what is a web framework

Answer 1

give baseline tools such as routing, asset management, etc so you don’t have to start from stratch

Question 2

what is the MVC framework

Answer 2

Model - View - Controller

Question 3

what is an opinionated framework

Answer 3

convention over configuation . have a certain way to set up organization

Question 4

what goes in the app file

Answer 4

models, view, controllers

Question 5

what goes in config file

Answer 5

routes

Question 6

what goes in db file

Answer 6

migration files, schema, seed

Question 7

syntax for route in rails

Answer 7

get “/route”, to “route#index”

Question 8

syntax for controller

Answer 8

class FileController < ApplicationController
def index
end
end

Question 9

what is the Model

Answer 9

like a chef. communicates with database via Active Record

Question 10

what is the Controller

Answer 10

like the waiter. transmits data from user to the models and back to the user to view

Question 11

what is the view

Answer 11

like the table. where date is visible to user

Question 12

why use rails generators

Answer 12

less time consuming
help prevent errors and debug

Question 13

types of generator

Answer 13

rails g model - create model
rails g controller - create controller
rails g migration - create new table
rails g resources - create model, controller, migration, view folder and routes

Question 14

syntax for rails generator

Answer 14

rails g model TableName column1 column2:integer

Question 15

what does rail generator default to for type

Answer 15

string

Question 16

what do you run to save a migration

Answer 16

rails db:migrate

Question 17

syntax for seed

Answer 17

Table.create(column: “data”, column: “data”)

Question 18

what is the basic HTTP work flow

Answer 18

client request to server (fetch)
request goes to server where router interpret request and sends message to controller to map route
controller uses model to access database
controller uses data to render view (HTML or JSON)
server returns response

Question 19

Which name is singular and which is plural in model and controller names

Answer 19

model = singular
controller = plural

Question 20

what is rails is like binding.pry

Answer 20

byebug

Question 21

Process for Dynamic Routes

Answer 21

routes that include parameter
routes send to controller
get instance associated with params

Question 22

static routes

Answer 22

always have fixed routes (/user)

Question 23

dynamic routes

Answer 23

render different data based on the parameters (/user/:id)

Question 24

what does the code in controller look like for dynamic routes

Answer 24

def show
user = user.find(param [:id])
render json: user
end

Question 25

what do static routes look like in controller

Answer 25

def index users = user.all render json: users end

Question 26

what are the 2 ways to custom render data in the controller

Answer 26

selecting specific with only: [:id, :name, :address] using exclude to state which ones not to add except: [:created_at, :updated_at]

Question 27

how to include methods in the controller that will be sent to user

Answer 27

add methods to the render json render json: user, except: [:created_at], methods: [summary]

Question 28

syntax for writing error messages in controller

Answer 28

else render json: {error: 'User not found'}, status: :not_found

Question 29

what is REST

Answer 29

standardized naming pattern used across many program languages to help developers determine how routing should be created it is the standard way of mapping CRUD actions from the HTTP methods

Question 30

7 routes that are apart of REST

Answer 30

index | get | display all objects new | get | form to create new object create | post | creates new object on server show | get | display specific object edit | get | form to edit specific object update | patch | update specific object on server destroy | delete | deletes specific object

Question 31

how do you see all the routes listed in terminal

Answer 31

rails routes

Question 32

what does resource do

Answer 32

in the routes file is creates all 7 routes

Question 33

to select which routes using resource

Answer 33

resource: class , only [:index, :create, :delete]

Question 34

what do strong params do

Answer 34

method that allows only certain parameters

Question 35

how do create strong params

Answer 35

def create user = User.create(user_params) render json: user, status: :created end private def user_params params.permit(:name, :email) end end

Question 36

why use strong params

Answer 36

stops mass assignment cleaner code

Question 37

how to add column using migration

Answer 37

rails g migration AddColumnToClass column:integer

Question 38

controller syntax for update existing element

Answer 38

def update user = User.find_by(id: params [:id]) if user user.update(user_params) render json: user else render json: {error: "User not found"}, status: :not_found end private def user_params params.permit(:name, :email, :password) end end

Question 39

what are validations in rails

Answer 39

special methods calls that go at thetop of model class definitions and prevent them from being saved to database if the data isn't correct

Question 40

why do we have validations

Answer 40

protects database from bad data

Question 41

when are validations checked

Answer 41

when adding or updating data through ruby/rails

Question 42

what is syntax for setting up validations

Answer 42

2 arguments the attribute and how to validate validates :name, presence: true

Question 43

how do you trigger validations without touching database

Answer 43

.valid? method def create user = User.create(user_params) if user.valid? render json: user, status: :created else render json: {errors: person.errors.full_messages}, status: :unprocessable_ entity end end

Question 44

what are built in validators

Answer 44

length - validates :name, length:{minimum: 2} uniqueness - validates :email, uniqueness: true

Question 45

controller validations manually with if else using valid? syntax

Answer 45

def create user = User.create(user_params) if user.valid? render json: user, status: :created else render json: {errors: bird.errors}, status: :unprocessable entity end end

Question 46

how do you format error messages

Answer 46

user.errors user.errors.full_messages

Question 47

steps for creating rails API

Answer 47

1. generate rails application 2. create model 3. migrations 4. controller 5. routes 6. seed database 7. set up routes

Question 48

where do you debug 404 error

Answer 48

in browser under network tab and then preview tab

Question 49

where do you look at syntax error

Answer 49

return JSON response in controller and frontend fetch

Question 50

where do you look server error

Answer 50

in server log: it gives error itself and file/name of error

Question 51

what do active record associations do

Answer 51

allow us to connect complex networks of models

Question 52

how are models connected

Answer 52

with foreign keys

Question 53

how do you setup many to many

Answer 53

with a join table that has foreign key from both models

Question 54

the join table for many to many would have

Answer 54

foriegn keys from both tables and belongs_to: in the model

Question 55

in the many to many relationship what goes into the models that both have many

Answer 55

has_many :join_table has_many :other_table, through: :join_table

Question 56

how do you show associated data

Answer 56

use include: :join_table

Question 57

how do you delete assocaited data

Answer 57

dependent: :destroy

Question 58

what are cookies

Answer 58

small pieces of information that are sent from the server to the client and stored in client

Question 59

what do cookies help with

Answer 59

making HTTP stateful

Question 60

what do cookies store

Answer 60

sessions information such as login, shopping cart, location, personalization, tracking information

Question 61

what do you use in the controllers to save cookies

Answer 61

sessions controller

Question 62

what is authentication

Answer 62

application confirm users are who they say they are

Question 63

what is the flow for authentication

Answer 63

user uses login form on submit a post request is sent routes to post "/login", to "sessions#create" session controller set cookie as users id into session hash

Question 64

what is the session controller create syntax

Answer 64

def create user = User.find_by(username: params[:username]) session[:user_id] = user.id render json: user end end