Class: ROM::Finalize::FinalizeRelations

Inherits:
Object
  • Object
show all
Defined in:
lib/rom/setup/finalize/finalize_relations.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gateways, relation_classes, notifications:, mappers: nil, plugins: EMPTY_ARRAY) ⇒ FinalizeRelations

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Build relation registry of specified descendant classes

This is used by the setup

Parameters:

  • gateways (Hash)
  • relation_classes (Array) —

    a list of relation descendants



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 18

def initialize(gateways, relation_classes, notifications:, mappers: nil, plugins: EMPTY_ARRAY)
  @gateways = gateways
  @relation_classes = relation_classes
  @mappers = mappers
  @plugins = plugins
  @notifications = notifications
end

Instance Attribute Details

#notifications ⇒ Object (readonly)

Returns the value of attribute notifications.



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 8

def notifications
  @notifications
end

Instance Method Details

#build_relation(klass, registry) ⇒ ROM::Relation

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 69

def build_relation(klass, registry)
  # TODO: raise a meaningful error here and add spec covering the case
  #       where klass' gateway points to non-existant repo
  gateway = @gateways.fetch(klass.gateway)

  plugins = schema_plugins

  schema = klass.schema_proc.call do
    plugins.each { |plugin| app_plugin(plugin) }
  end

  klass.set_schema!(schema) if klass.schema.nil?

  notifications.trigger(
    'configuration.relations.schema.allocated',
    schema: schema, gateway: gateway, registry: registry
  )

  relation_plugins.each do |plugin|
    plugin.apply_to(klass)
  end

  notifications.trigger(
    'configuration.relations.schema.set',
    schema: schema, relation: klass, adapter: klass.adapter
  )

  rel_key = schema.name.to_sym
  dataset = gateway.dataset(schema.name.dataset).instance_exec(klass, &klass.dataset)

  notifications.trigger(
    'configuration.relations.dataset.allocated',
    dataset: dataset, relation: klass, adapter: klass.adapter
  )

  mappers = @mappers.key?(rel_key) ? @mappers[rel_key] : MapperRegistry.new({}, cache: @mappers.cache)

  options = { __registry__: registry, mappers: mappers, schema: schema, **plugin_options }

  klass.new(dataset, options)
end

#plugin_options ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 112

def plugin_options
  relation_plugins.map(&:config).map(&:to_hash).reduce(:merge) || EMPTY_HASH
end

#relation_names ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 127

def relation_names
  @relation_classes.map(&:relation_name).map(&:relation).uniq
end

#relation_plugins ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 117

def relation_plugins
  @plugins.select(&:relation?)
end

#run! ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Hash) 


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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 29

def run!
  relation_registry = RelationRegistry.new do |registry, relations|
    @relation_classes.each do |klass|
      unless klass.adapter
        raise MissingAdapterIdentifierError,
              "Relation class +#{klass}+ is missing the adapter identifier"
      end

      key = klass.relation_name.to_sym

      if registry.key?(key)
        raise RelationAlreadyDefinedError,
              "Relation with name #{key.inspect} registered more than once"
      end

      klass.use(:registry_reader, relation_names)

      notifications.trigger('configuration.relations.class.ready', relation: klass)

      relations[key] = build_relation(klass, registry)
    end

    registry.each do |_, relation|
      notifications.trigger(
        'configuration.relations.object.registered',
        relation: relation, registry: registry
      )
    end
  end

  notifications.trigger(
    'configuration.relations.registry.created', registry: relation_registry
  )

  relation_registry
end

#schema_plugins ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/setup/finalize/finalize_relations.rb', line 122

def schema_plugins
  @plugins.select(&:schema?)
end