Other topics

Adding a JSON Column to a table

The following adds a column named client_data to a table named Bills. Notice that the singular form "Bill" is used when creating the migration although the table's name is "Bills."

rails g migration AddClientDataToBill client_data:json

class AddClientDataToBill < ActiveRecord:Migration[6.1]
    def change
        add_column :bill, client_data, :json
    end
end

Scopes

Partials

Helpers

Services

Mailers

Sending emails

lib

Channel

Jobs

Vendor

Factory

Spec

Gems

db

Useful Methods

.dig()

obj = { foo: {bar: {baz: 1}}}
obj.dig(:foo, :bar, :baz)     #=> 1

Get method parameters

def foo(a,b)
    puts "Hello"
end
metho = method(:foo)
metho.parameters

Get unique method for class

Class.methods - ActiveRecord::Base.methods
Class.methods - Object.methods

Kill a server process

lsof -wni tcp:3000
kill -9 51195