Errorio

Extend your models and classes with errors, warnings and other notices

Examples:

Extend ordinary AR model with special collection of warnings and notices

class Task < ApplicationRecord

include Errorio
errorionize :errors, :warnings, :notices # :errors is initialized by ActiveRecord, so it is redundant in this case

validates :name, presence: { code: :E0230 }
validate :special_characters_validation

private

def special_characters_validation
  return if name =~ /^[a-z0-9]*$/i
  exceptions = name.gsub(/[^a-z0-9]/i).map{ |a| "'#{a}'" }.join(','),
  warnings.add(:name, :special_characters, code: :E0231,
                                           chars: exceptions,
                                           message: 'Special characters are not recommended for name')
end

end

result = Task.create result.errors.to_e

>¶ ↑

[

{
  :code=>:E0230,
  :key=>:name,
  :type=>:blank,
  :message=>"Task Name can't be blank"
}

]

result = Task.create 'Do * now!' result.errors.to_e

>¶ ↑

result.warnings.to_e

>¶ ↑

[

{
  :code=>:E0231,
  :key=>:name,
  :type=>:special_characters,
  :message=>"Special characters ('*', '!') are not recommended for name"
}

]

Message should be described in en.yml file

errorio:

messages:
  E0231: "Special characters (%{chars}) are not recommended for name"

Implement errors and warnings to service class

class Calculate

include Errorio
errorionize :errors, :warnings

def initialize(a, b)
  @a = a
  @b = b
end

def sum
  return unless valid?
  a + b
end

def valid?
  return true if @a.is_a?(Numeric) && @b.is_a?(Numeric)
  errors.add :base, :not_a_numeric, Errorio.by_code(:E1000A)
end

end

calc = Calculate.new(3, '1') if (result = calc.sum)

puts result

else

puts calc.errors.to_e

end

> # [¶ ↑

{
  :code=>:E1000A,
  :key=>:base,
  :type=>:not_a_numeric,
  :message=>"Special characters are not recommended for name"
}

]