Module: Ey::Core::Associations

Included in:
Client::Account, Client::AccountReferral, Client::AccountTrial, Client::Addon, Client::Address, Client::Alert, Client::Application, Client::ApplicationArchive, Client::ApplicationDeployment, Client::BackupFile, Client::Component, Client::Contact, Client::Cost, Client::DatabasePlanUsage, Client::DatabaseServer, Client::DatabaseServerRevision, Client::DatabaseServerSnapshot, Client::DatabaseServerUsage, Client::DatabaseService, Client::Environment, Client::EnvironmentPlanUsage, Client::Feature, Client::Firewall, Client::FirewallRule, Client::Keypair, Client::KeypairDeployment, Client::LegacyAlert, Client::LoadBalancer, Client::LoadBalancerNode, Client::LoadBalancerService, Client::Log, Client::LogicalDatabase, Client::Membership, Client::Message, Client::PlanUsage, Client::Provider, Client::ProviderLocation, Client::Server, Client::ServerEvent, Client::ServerUsage, Client::SslCertificate, Client::Storage, Client::StorageUser, Client::SupportTrial, Client::Task, Client::UntrackedAddress, Client::UntrackedServer, Client::User, Client::Volume
Defined in:
lib/ey-core/associations.rb

Instance Method Summary collapse

Instance Method Details

#assoc_accessor(name, options = {}) ⇒ Object Also known as: has_one 



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# File 'lib/ey-core/associations.rb', line 100

def assoc_accessor(name, options={})
  assoc_coverage(options)

  if self.associations[name]
    raise ArgumentError, "#{self.name} association[#{name}] specified more than once"
  else
    self.associations[name] = options
  end

  aliases = Array(options[:aliases] || name.to_s)

  attribute(:"#{name}_url", aliases: aliases, parser: lambda { |v,_| v.is_a?(String) && v })

  assoc_reader(name, options)
  assoc_writer(name, options)
end

#assoc_coverage(options) ⇒ Object 



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# File 'lib/ey-core/associations.rb', line 2

def assoc_coverage(options)
  if defined? Cistern::Coverage
    call = Cistern::Coverage.find_caller_before("ey-core/associations.rb")

    if call and call.label.start_with?("<class:")
      options[:coverage_file] = call.absolute_path
      options[:coverage_line] = call.lineno
      options[:coverage_hits] = 0
    end
  end
end

#assoc_reader(name, options = {}) ⇒ Object 



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# File 'lib/ey-core/associations.rb', line 18

def assoc_reader(name, options={})
  assoc_key  = options[:key]        || "#{name}_id"
  collection = options[:collection] || "#{name}s"
  resource   = options[:resource]   || name
  assoc_name = options[:assoc_name] || resource

  # handle polymorphic assocations
  #
  # really only used for connector sources, as they may be cluster_components or addons
  disambiguate = Proc.new do |object, url, index=0|
    if object.is_a?(Array) && index > (object.size - 1)
      raise "No matching object found in #{object}"
    elsif object.is_a?(Array) && url
      url_pieces = URI.parse(url).path.split("/").map { |piece| piece.gsub(/-|_/,'') } # "/cluster-components/x" => ["clustercomponents", "x"]

      object.find do |model|
        normalized_model = model.to_s.gsub(/-|_/, '') # [:cluster_components, :addons] => ["clustercomponents", "addons"]
        url_pieces.find { |piece| piece.include?(normalized_model) }
      end
    elsif object.is_a?(Array)
      object[index]
    else
      object
    end
  end

  define_method(name) do
    url = self.send("#{name}_url")
    id  = send(assoc_key)

    if id || url
      begin
        index ||= 0
        this_resource   = disambiguate[resource, url, index]
        this_assoc_name = disambiguate[assoc_name, url, index]
        this_collection = disambiguate[collection, url, index]

        fetched = self.connection.send("get_#{this_assoc_name}", {"id" => id, "url" => url}).body
      rescue RuntimeError => e
        if e.message.match(/url needed/i)
          index += 1
          retry if index < 3
        else
          raise e
        end
      rescue Ey::Core::Response::NotFound
        index += 1
        index < 3 ? retry : raise
      end

      unless fetched[this_resource.to_s]
        raise "Expected a '#{this_resource.to_s}' in '#{fetched.inspect}'"
      end

      attributes = fetched[this_resource.to_s]

      if self.connection.respond_to?(this_collection)
        attributes = attributes.merge(collection: self.connection.send(this_collection))
      end

      self.connection.send(this_assoc_name, attributes)
    end
  end
end

#assoc_writer(name, options = {}) ⇒ Object 



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# File 'lib/ey-core/associations.rb', line 83

def assoc_writer(name, options={})
  assoc_key = options[:key] || "#{name}_id"
  url_key   = options[:key] || "#{name}_url"

  attr_accessor assoc_key

  define_method("#{name}=") do |assoc|
    if assoc.respond_to?(:identity)
      self.send("#{assoc_key}=", assoc.identity)
    elsif assoc.is_a?(String) && assoc.match(URI::regexp)
      self.send("#{url_key}=", assoc)
    else
      self.send("#{assoc_key}=", assoc)
    end
  end
end

#associations ⇒ Object 



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# File 'lib/ey-core/associations.rb', line 14

def associations
  @associations ||= {}
end

#collection_reader(name, options = {}) ⇒ Object Also known as: has_many 



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# File 'lib/ey-core/associations.rb', line 119

def collection_reader(name, options={})
  assoc_coverage(options)

  if self.associations[name]
    raise ArgumentError, "#{self.name} association[#{name}] specified more than once"
  else
    self.associations[name] = options
  end

  attribute(:"#{name}_url", aliases: options[:aliases] || [name.to_s])

  assoc_key = options[:key] || name
  collection_key = options[:model] || assoc_key

  define_method(name) do
    value = self.send("#{name}_url")

    if self.identity && !value
      raise "Cannot load #{name} association: #{name}_url is not set"
    end

    # @fixme this allows collections to be stored in a url variable on create before being replaced
    # by a url entry after create upon {#merge_attributes}
    if value.nil?
      []
    elsif value.is_a?(String) && value.match(URI::regexp)
      self.connection.send(collection_key, {"url" => value})
    elsif value.is_a?(Hash)
      [value]
    else
      Array(value)
    end
  end
end