Module: Mobility::Backend::OrmDelegator

Included in:
Mobility::Backends::Column, Mobility::Backends::Hstore, Mobility::Backends::Jsonb, Mobility::Backends::KeyValue, Mobility::Backends::Serialized, Mobility::Backends::Table
Defined in:
lib/mobility/backend/orm_delegator.rb

Overview

Adds #for method to backend to return ORM-specific backend.

Examples:

KeyValue backend for AR model

class Post < ActiveRecord::Base
  # ...
end
Mobility::Backends::KeyValue.for(Post)
#=> Mobility::Backends::ActiveRecord::KeyValue

Instance Method Summary collapse

Instance Method Details

#for(model_class) ⇒ Class

Returns Class of backend to use for model.

Parameters:

  • model_class (Class) —

    Class of model

Returns:

  • (Class) —

    Class of backend to use for model



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# File 'lib/mobility/backend/orm_delegator.rb', line 18

def for(model_class)
  namespace = name.split('::'.freeze)
  if Loaded::ActiveRecord && model_class < ::ActiveRecord::Base
    require_backend("active_record", namespace.last.underscore)
    const_get(namespace.insert(-2, "ActiveRecord".freeze).join("::".freeze))
  elsif Loaded::Sequel && model_class < ::Sequel::Model
    require_backend("sequel", namespace.last.underscore)
    const_get(namespace.insert(-2, "Sequel".freeze).join("::".freeze))
  else
    raise ArgumentError, "#{namespace.last} backend can only be used by ActiveRecord or Sequel models".freeze
  end
end