README

My Demo Link: https://beta-blog-firman.herokuapp.com

Create and Run

rails new ruby-blog cd ruby-blog rails server

then open http://localhost:3000/

How to deploy:

Add config-prod in Gemfile

group :production do
gem 'pg' # it's for postgress on production
end

Move SQLite in Gemfile, from global into development-test gem 'sqlite3'
run

bundle

Open database.yml change production to using postgress

production:
adapter: postgresql
database: my_database_production
pool: 5
timeout: 5000

after change Gemfile don't forget exec this one

bundle update

then add, commit and pust to github
To add your SSH key to your heroku account so you don't have to use username and password everytime ->

heroku keys:add

intall heroku from https://devcenter.heroku.com/articles/heroku-cli and check installed

heroku heroku --version

Run this to deploy heroku (https://devcenter.heroku.com/articles/getting-started-with-ruby#set-up)

heroku login git push heroku master heroku open

if you got an application error exec this to open irb database console

heroku run rails console

if you want to rename domain exec this (example: https://beta-blog-firman.herokuapp.com/)

heroku rename beta-blog-firman

to open restart and open

heroku restart heroku open

Database Operation:

Create (db/migrate)

rails generate migration create_articles

then Add t.string :title
Run:

rails db:migrate

When we want add new column. this script to drop table and will gone from schema.rb

rails db:rollback

rollback is when we need to change existing file in /db/migrate/fileName.rb
rollback doesn't apply to migration that we have created a new file
then we don't need to run rails db:rollback just need to run rails db:migrate
add column t.text :description in db/migrate/x_create_articles.rb then run this again to generate the schema.rb

rails db:migrate

next step we wan't using desc first

rails db:rollback

delete t.text :description in db/migrate/x_create_articles.rb
update schema.rb

rails db:migrate

we add description column with another way, using new migration file

rails generate migration add_description_to_articles

add this scripts to the db/migrate/x_add_description_to_articles.rb

add_column :articles, :description, :text # table : column : column type
add_column :articles, :created_at, :datetime
add_column :articles, :updated_at, :datetime

update schema.rb

rails db:migrate

now we create Model app\models\article.rb

class Article < ApplicationRecord  
end

we going to Create and Read record for database with rails console info: to open console

rails console

this name of article.rb will show query select "articles".* from "articles"

Article.all

to make var = model, to storing data

article = Article.new

to storing article title

article.title = "this is my first article"

to storing article description

article.description = "this is my first article's description"

to show record in model var

article

to save into database

artivle.save

INSERT INTO "articles" ("title", "description", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["title", "this is my first article"], ["description", "this is my first article's description"], ["created_at", "2019-05-19 00:12:25.061288"], ["updated_at", "2019-05-19 00:12:25.061288"]]

show record

Article.all

Article Load (0.3ms)  SELECT  "articles".* FROM "articles" LIMIT ?  [["LIMIT", 11]]
=> #<ActiveRecord::Relation [#<Article id: 1, title: "this is my first article", description: "this is my first article's description", created_at: "2019-05-19 00:12:25", updated_at: "2019-05-19 00:12:25">]>

to check true or false. article nil or not

article.new_record?

article = Article.new(title: "my 2nd title", description: "my 2nd description") we can also do this

how to Find and Update record

article = Article.find(2) article.title = "my 2nd title edited" article.save

Article Update (2.4ms)  UPDATE "articles" SET "title" = ?, "updated_at" = ? WHERE "articles"."id" = ?  [["title", "my 2nd title edited"], ["updated_at", "2019-05-19 01:22:45.623705"], ["id", 2]]

how to Delete record

article = Article.find(2) article.destroy

Article Destroy (1.8ms) DELETE FROM "articles" WHERE "articles"."id" = ? [["id", 2]]

Add Validation in models (article.rb) validates :title, presence: true, length: { minumum: 3, maximum: 50 }
After update Model we need to reload console

reload! exit rails console

To find out error message in model console

article.errors.any? article.errors.full_messages

Add articles routes.rb resources :articles # this one for POST GET to CRUD

rails routes to see list of routes

The following must be execute after Create Module / update Schema when deploy production:

For first time don't forget Create a Database first in heroku
- Inside the newly created app, switch to Resources tab.
- Under Add-ons, search for Heroku Postgres and then select from the suggested list.
- In the popup shown, select free Hobby Dev - Free plan, click Provision.
- Click on the just added database (Heroku Postgres :: Database).
- Scroll towards the bottom of the page and click on View Credentials button (In Tab Setting ). You will see the database credentials you will need to use when connecting to this database from API Express.
after that update our database.yml

adapter: postgresql
database: secret-secret-
username: secret-secret-secret
password: secret-secret-secret-secret-secret-secret-secret-secret
pool: 5
timeout: 5000

then commit and push to github
Run

heroku login git push heroku master

to create any table that we have done in development

heroku run rails db:migrate heroku open

Setup Bootstrap CSS

go to https://github.com/twbs/bootstrap-sass
you will see this script and gem 'bootstrap-sass', '~> 3.4.1' copy paste it into GEMFILE.
Above the gem 'sass-rails' and After that run

bundle install --without production

create file assets/stylesheets/custome.css.scss and add this

@import "bootstrap-sprockets";
@import "bootstrap";

open assets/javascripts/application.js add this as sequential

// require jquery
//= require rails-ujs
//= require bootstrap-sprockets

How to create local branch in github with TortoiseGit

Right-Click in D:\ror\ruby-blog then TortoiseGit --> Create Branch
Fill up the branch name example Underdevelopment-branch
Ensure choose Base On Head(Master)
Then Right-Click in D:\ror\ruby-blog then TortoiseGit --> Swich/CheckOut
Choose the branch

How to create remote branch in github with TortoiseGit

Right-Click in D:\ror\ruby-blog then TortoiseGit --> Settings
Click Git --> Remote
Create new one and save it

remote: Underdevelopment-Branch
URL: https://github.com/mfirmanakbar/ruby-blog.git
Tags reachable
Prune

How to commit with branching

Just don't forget when commit and push please select Local and Remote Underdevelopment-branch
Then we will merge to master soon maybe better in github page

How to merge branch to Master

Then Right-Click in D:\ror\ruby-blog then TortoiseGit --> Swich/CheckOut
Choose Master (local not remote)
TortoiseGit --> Merge
Choose Branch Remotes/Underdevelopment-Branch/Underdevelopment-Branch
Then Push it (no need commit/ commit already when we merged)
to start coding again Swich/CheckOut choose Underdevelopment-Branch (local not remote)

How to get first and last record limit 1

open IRB with run rails console

Article.first Article.last

How to debug

example we want to debug Article Controller in Create function
just put debugger after line def create and comment out # @art.user = User.first

def create
  debugger
  @art = Article.new(article_params)
  # to find users limit 1. this is for us Hard code the user_id for articles table
  # @art.user = User.first
  if @art.save
    flash[:success] = "Article was successfully created"
    logModel(@art)
    redirect_to article_path(@art)
  else
    render 'new'
  end
end

look at our terminal / cmd. by right should showing the log of debug
we can call variable like @art which we already defined inside that controller
type params to show all paramters
type n then ENTER to go the next line of debug
fot stop the debug just CTRL + D and it goes back to rails server

How to create Hash Secure Password

add has_secure_password in /app/models./user.rb
create new migration rails migration add_password_digest_to_users then write this

class AddPasswordDigestToUsers < ActiveRecord::Migration[5.2]
  def change
    add_column :users, :password_digest, :string
  end
end

then run rails db:migrate
how to use? if we save user.password = "password" it will return has user.password = "$2a$10$EuSH7ctK1kXNuKPnO7MaGuXnfE1yrbntClRLVbUnsKp..."
how to testing Run

user.authenticate("password") it will return true

Update boolean admin

user = User.find(7) user.admin? true user.toggle!(:admin) updated

How to Test apps

in rails 5 i change this:
comment out this becuase already deprecated gem 'chromedriver-helper'
then add gem 'webdrivers', '~> 3.0'
create migration to add category table > rails generate migration add_categories

class AddCategories < ActiveRecord::Migration[5.2]
  def change
    create_table :categories do |t|
      t.string :name
      t.timestamps
    end
  end
end

then run > rails db:migrate
create model in /app/models/category.rb
create category_test.rb in /test/models/category_test.rb

require 'test_helper'

class CategoryTest < ActiveSupport::TestCase

  def setup
    @category = Category.new(name: "sports")
  end

  test "category should be valid" do
    asssert @category.valid?
  end

end

run it with > rails test
if got some error run this

bundle exec rails db:migrate bundle exec rails db:test:prepare