Module: Selections::Selectable::ModelMixin::ClassMethods

Defined in:
lib/selections/selectable.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(lookup_code, *options) ⇒ Object

Dynamic Lookups

Assuming there is a list with the following system_codes

example of a nested list of system codes:

  • priority

    • high

    • medium

    • low

Selection.priority => return priority instance

Selection.priorities => returns [high, medium, low] instances (children)



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# File 'lib/selections/selectable.rb', line 44

def method_missing lookup_code, *options
  if (scope = where(system_code: lookup_code.to_s)).exists?
    scope.first
  elsif (scope = where(system_code: lookup_code.to_s.singularize)).exists?
    scope.first.children
  else
    super
  end
end

Instance Method Details

#label_to_id(label) ⇒ Object

label_to_id

When using fixtures with the label same as the system_code, use this method to return the ID of the of the fixture and use this in Factories instead of using a lookup as it does not need a DB search.

eg: Fixture File

priority_high:

name: Priorities
system_code: priority_high
parent: priority

in Factory

priority: { Selection.priority_high } <== Don’t do this as it will need a DB lookup

priority_id: { Selection.label_to_id(:priority_high) } <== This will be much quicker



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# File 'lib/selections/selectable.rb', line 74

def label_to_id(label)
  # ActiveRecord::FixtureSet replaces ActiveRecord::Fixtures in Rails 4
  # This helps to ensure backwards compatibility
  if ActiveRecord::VERSION::MAJOR >= 4
    ActiveRecord::FixtureSet.identify(label)
  else
    ActiveRecord::Fixtures.identify(label)
  end
end