Creating an App

Rails 4.2.3

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Getting Started

Delete any previous schemas, create a new database, seed the database with data

rake db:wipe

Start the server

rake server:start

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Reviewing Tasks

I prefer to create tasks first that will help me automate stuff such as wiping my development database, auto restarting my local web server and removing comments from my Gemfile.

Remove the ugly comments from Gemfile

rails gemfile:clean

Drop the db schema, create a new one, migrate any content and populate any existing data.

rails db:wipe

Run Rails while monitoring the files withing /app and config. Restart if changes are made.

rails server:start

Check which pid your server is running on

rails server:pid

Force kill the server

rails server:kill [:pid]

Remove the server

rails server:remove_server

Review all the commands it took to create this app

rails app:initialize

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Installing libraries

Step 1

Review Gemfile to see the various libraries used.

Step 2

Install the libraries

bundle install

Step 3

You'll need to visit the Bootstrap Documentation and add modify app/assets/stylesheets/application.scss and app/assets/javascripts/application.js.

Step 4 - Simple Form

Visit simple form documentation to install.

rails g simple_form:install --bootstrap

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Rails Command Line

There are many innovations within the Rails framework but my favorite is the Rails Command Line. generate (g) is a powerful tool which allows you to create task, scaffold, model, controller, migration, erb:scaffold, db, and much more.

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The App

Models

Create a task so that customers can request tasks and vendors can sell their tasks. Models are the Object of the application. Models are singular and Capital. The columns follow after the Name and require a datatype such as string, text, datetime.

rails g model Task title:string description:text company:string url:string

rake db:migrate

Controllers

Controllers access the Objects (from the database). Controllers are plural. If you add an action (aka method) after the controller, you will also get routes, views, tests, stylesheets, and helpers for free. This is great because you don't have to add them in manually.

rails g controller tasks index show new create edit update destroy

Resources

• List of Associations - Includes belongs_to, has_one, has_many, has_many :through, has_one :through, has_and_belongs_to_many