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README

This is a basic setup of rails with react as frontend. Please follow the steps:

Creating a new rails application using Docker

Prepare the project directory

mkdir PROJECTNAME
cd PROJECTNAME
touch Dockerfile Gemfile Gemfile.lock docker-compose.yml

Copy the following contents into Dockerfile:

FROM ruby

RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add \
  && echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list \
  && apt-get update && apt-get install -y nodejs yarn --no-install-recommends \
  && gem install rails

WORKDIR /app

COPY Gemfile Gemfile.lock /app/
RUN bundle install

CMD ["/bin/bash"]

Copy the following contents into docker-compose.yml:

services:
  db:
    image: postgres
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    depends_on:
      - db
    ports:
      - "3000:3000"
    volumes:
      - .:/app:delegated
version: '3'

Initialize your git repository and make an initial commit:

git init
git add .
git commit -m "Prepare the project directory"

Create the rails project

First build the web container image using docker-compose:

docker-compose build web

Then run rails new to create the initial rails project:

docker-compose run web rails new . --force --no-deps --database=postgresql \
--webpack=react --skip-coffee

Add everything to git and make a new commit:

git add .
git commit -m "Run 'docker-compose run web rails new . --force --no-deps --database=postgresql --webpack=react --skip-coffee'"

If you are running linux, chown the newly generated files and directories.

Finally, re-build the web container so that it now includes the project dependencies:

docker-compose build web

Configure the project to talk to the database container

Add the following to lines to the default section of config.database.yml:

  host: db
  username: postgres

Make a commit:

git add .
git commit -m "Configure the project to talk to the database container"

Create the development and test databases

docker-compose run web rails db:create

If you encounter permission errors in this step, try chown the current directory or run docker-compose up.

Install frontend dependencies

Add frontend packages with yarn:

docker-compose run web yarn add react-router-dom bootstrap jquery popper.js

This will add corresponding packages in package.json and yarn.lock.

Commit the changes and rebuild the image

docker-compose build web

Start the development server

docker-compose up

At this point you should be able to access the “Yay! You’re on Rails!” page via http://localhost:3000.

Other

To start afresh, destroy the scaffold using -
rails destroy scaffold User Steps to create the models -

rails g model user email:string password_digest:string first_name:string last_name:string

rails g model comment content:string username:string parent_id:integer

rails g model event host_name:string location_name:string street_address:string start_time:datetime end_time:datetime title:string description:string

rails g model invite message:string guest_email:string

rails g model rsvp response:string num_guests:integer guest_name:string

To create a new migration file
rails g migration AddAssociations

After modifying the models each time, run:
rake db:migrate

Elastic Beanstalk
eb create -db.engine postgres -db.i db.t3.micro -db.user u --envvars SECRET_KEY_BASE=RANDOM_SECRET --single 1337PACK

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