Contents

module Paraphrase
  # {Repository} is were query-specific scopes are defined. They can be defined
  # by re-opening the class inside the {Query} class definition or by using the
  # {Query.scope scope} class method on {Query}. Both methods are equivalent.
  #
  # Inside scopes defined on a {Repository}, the method has access to
  # {Query#params} as `params`.
  class Repository
    attr_reader :relation, :mapping, :params

    def self.chain(relation, mapping, params)
      new(relation, mapping, params).chain
    end

    def initialize(relation, mapping, params)
      @relation, @mapping, @params = relation, mapping, params
    end

    def chain
      if mapping.satisfied?(params)

        if scope.arity.zero?
          relation.scoping { scope.call }
        else
          values = mapping.values(params)
          relation.scoping { scope.call(*values) }
        end
      else
        relation
      end
    end

    def scope
      @scope ||=
        if respond_to?(mapping.name)
          method(mapping.name)
        else
          relation.klass.method(mapping.name)
        end
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
paraphrase-0.14.0	lib/paraphrase/repository.rb
paraphrase-0.13.1	lib/paraphrase/repository.rb
paraphrase-0.13.0	lib/paraphrase/repository.rb
paraphrase-0.12.0	lib/paraphrase/repository.rb
paraphrase-0.11.0	lib/paraphrase/repository.rb