AfolabiOlaoluwa

# Variant 1
def user_params(type)
  params.require(type.to_sym).permit(attributes)
end

# Variant 2
def user_params(type)
  case type
  when "user"
    params.require(:user).permit(user_attributes)

AfolabiOlaoluwa

class Comment < ActiveRecord::Base
  belongs_to :post, counter_cache: true
end

AfolabiOlaoluwa

Sending emails with ActionMailer and Sidekiq

Send email asynchroniously using Sidekiq.

ActionMailer

Create your mailer us usual:

AfolabiOlaoluwa

# Write some code, that will flatten an array of arbitrarily nested arrays of integers into a flat array of integers. 
# e.g. [[1,2,[3]],4] -> [1,2,3,4].


# SOLUTION
class Array
  def flatten_array(number = nil)
    number ? multiple_flatten(self, number) : recursive_flatten(self)
  end

AfolabiOlaoluwa

## When Should I Not Use a Service Object?
This one’s easy. I have these rules:

1. Does your code handle routing, params or do other controller-y things?
If so, don’t use a service object—your code belongs in the controller.

2. Are you trying to share your code in different controllers?
In this case, don’t use a service object—use a concern.

3. Is your code like a model that doesn’t need persistence?

AfolabiOlaoluwa

FROM ruby:2.4

## In case of postgresql for heroku:
# RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main" >> /etc/apt/sources.list.d/postgeresql.list \
#  && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
#  && apt-get update                                     \
#  && apt-get update                                     \
#  && apt-get install -y --no-install-recommends         \
#    postgresql-client-9.6 pv ack-grep ccze unp htop vim \
#  && rm -rf /var/lib/apt/lists/*                        \

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Deploying to Heroku

1. Deploy the app to heroku following heroku normal instructions (add link to heroku help)

2. Set heroku environment variables

   Make sure all the options in config.yml are properly set then run:

    bundle exec rake heroku:config
   

AfolabiOlaoluwa

------------ From Rake Task

namespace :app do

  # Checks and ensures task is not run in production.
  task :ensure_development_environment => :environment do
    if Rails.env.production?
      raise "\nI'm sorry, I can't do that.\n(You're asking me to drop your production database.)"
    end
  end

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How to seed a Rails database with a CSV file

1. Setup

First, Create a folder inside of lib called seeds

Put your CSV file example.csv into the lib/seeds folder. In the example below, the file is called real_estate_transactions.csv

Make sure you've created a resource with the appropriate columns to match your seed data. The names don't have to match up.

AfolabiOlaoluwa

# coding: utf-8
import json
import stripe
import datetime

# Required for OAuth flow
from rauth import OAuth2Service

# Our secret key from stripe
STRIPE_SECRET_KEY = 'sk_test_xxxxxxxxxxxxx'