Class: ActiveModel::Serializer
- Inherits:
-
Object
- Object
- ActiveModel::Serializer
show all
- Includes:
- Serializable
- Defined in:
- lib/active_model/serializer.rb,
lib/active_model/serializer/config.rb,
lib/active_model/serializer/version.rb,
lib/active_model/serializer/association.rb,
lib/active_model/serializer/association/has_one.rb,
lib/active_model/serializer/association/has_many.rb
Defined Under Namespace
Classes: Association, Config
Constant Summary
collapse
- EMBED_IN_ROOT_OPTIONS =
[
:include,
:embed_in_root,
:embed_in_root_key,
:embed_namespace
].freeze
- CONFIG =
Config.new('embed' => :objects)
- VERSION =
'0.9.7'
ActiveModel::Serializable::INSTRUMENTATION_KEY
Class Attribute Summary collapse
Instance Attribute Summary collapse
Class Method Summary
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Instance Method Summary
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#as_json, included, #namespace, #serializable_data, #serializable_object_with_notification
Constructor Details
#initialize(object, options = {}) ⇒ Serializer
Returns a new instance of Serializer.
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# File 'lib/active_model/serializer.rb', line 142
def initialize(object, options={})
@object = object
@scope = options[:scope]
@root = options.fetch(:root, self.class._root)
@polymorphic = options.fetch(:polymorphic, false)
@meta_key = options[:meta_key] || :meta
@meta = options[@meta_key]
@wrap_in_array = options[:_wrap_in_array]
@only = options[:only] ? Array(options[:only]) : nil
@except = options[:except] ? Array(options[:except]) : nil
@key_format = options[:key_format]
@context = options[:context]
@namespace = options[:namespace]
end
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Class Attribute Details
._associations ⇒ Object
Returns the value of attribute _associations.
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# File 'lib/active_model/serializer.rb', line 76
def _associations
@_associations
end
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._attributes ⇒ Object
Returns the value of attribute _attributes.
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# File 'lib/active_model/serializer.rb', line 76
def _attributes
@_attributes
end
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._root ⇒ Object
Returns the value of attribute _root.
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# File 'lib/active_model/serializer.rb', line 76
def _root
@_root
end
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Returns the value of attribute key_format.
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# File 'lib/active_model/serializer.rb', line 57
def key_format
@key_format
end
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Instance Attribute Details
#context ⇒ Object
Returns the value of attribute context.
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# File 'lib/active_model/serializer.rb', line 156
def context
@context
end
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Returns the value of attribute key_format.
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# File 'lib/active_model/serializer.rb', line 156
def key_format
@key_format
end
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Returns the value of attribute meta.
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# File 'lib/active_model/serializer.rb', line 156
def meta
@meta
end
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Returns the value of attribute meta_key.
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# File 'lib/active_model/serializer.rb', line 156
def meta_key
@meta_key
end
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#object ⇒ Object
Returns the value of attribute object.
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# File 'lib/active_model/serializer.rb', line 156
def object
@object
end
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#polymorphic ⇒ Object
Returns the value of attribute polymorphic.
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# File 'lib/active_model/serializer.rb', line 156
def polymorphic
@polymorphic
end
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#root ⇒ Object
Returns the value of attribute root.
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# File 'lib/active_model/serializer.rb', line 156
def root
@root
end
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#scope ⇒ Object
Returns the value of attribute scope.
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# File 'lib/active_model/serializer.rb', line 156
def scope
@scope
end
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#serialization_options ⇒ Object
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# File 'lib/active_model/serializer.rb', line 293
def serialization_options
@serialization_options || {}
end
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Class Method Details
.attributes(*attrs) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 87
def attributes(*attrs)
attrs.each do |attr|
striped_attr = strip_attribute attr
@_attributes << striped_attr
define_method striped_attr do
object.read_attribute_for_serialization attr
end unless method_defined?(attr)
end
end
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.embed(type, options = {}) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 35
def embed(type, options={})
CONFIG.embed = type
if EMBED_IN_ROOT_OPTIONS.any? { |opt| options[opt].present? }
CONFIG.embed_in_root = true
end
if options[:embed_in_root_key].present?
CONFIG.embed_in_root_key = options[:embed_in_root_key]
end
ActiveSupport::Deprecation.warn "** Notice: embed is deprecated. **\nThe use of .embed method on a Serializer will be soon removed, as this should have a global scope and not a class scope.\nPlease use the global .setup method instead:\nActiveModel::Serializer.setup do |config|\nconfig.embed = :\#{type}\nconfig.embed_in_root = \#{CONFIG.embed_in_root || false}\nend\n"
end
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# File 'lib/active_model/serializer.rb', line 54
def format_keys(format)
@key_format = format
end
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.has_many(*attrs) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 103
def has_many(*attrs)
associate(Association::HasMany, *attrs)
end
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.has_one(*attrs) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 99
def has_one(*attrs)
associate(Association::HasOne, *attrs)
end
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.inherited(base) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 16
def inherited(base)
base._root = _root
base._attributes = (_attributes || []).dup
base._associations = (_associations || {}).dup
end
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.root_name ⇒ Object
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# File 'lib/active_model/serializer.rb', line 80
def root_name
if name
root_name = name.demodulize.underscore.sub(/_serializer$/, '')
CONFIG.plural_default_root ? root_name.pluralize : root_name
end
end
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.serializer_for(resource, options = {}) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 59
def serializer_for(resource, options = {})
if resource.respond_to?(:serializer_class)
resource.serializer_class
elsif resource.respond_to?(:to_ary)
if Object.constants.include?(:ArraySerializer)
::ArraySerializer
else
ArraySerializer
end
else
klass_name = build_serializer_class(resource, options)
Serializer.serializers_cache.fetch_or_store(klass_name) do
_const_get(klass_name)
end
end
end
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.serializers_cache ⇒ Object
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# File 'lib/active_model/serializer.rb', line 107
def serializers_cache
@serializers_cache ||= Concurrent::Map.new
end
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.setup ⇒ Object
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# File 'lib/active_model/serializer.rb', line 22
def setup
@mutex.synchronize do
yield CONFIG
end
end
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Instance Method Details
#association_options_for_serializer(association) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 245
def association_options_for_serializer(association)
prefix = association.options[:prefix]
namespace = association.options[:namespace] || @namespace || self.namespace
{ scope: scope }.tap do |opts|
opts[:namespace] = namespace if namespace
opts[:prefix] = prefix if prefix
end
end
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#associations(options = {}) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 174
def associations(options={})
associations = self.class._associations
included_associations = filter(associations.keys)
associations.each_with_object({}) do |(name, association), hash|
if included_associations.include? name
if association.embed_ids?
ids = serialize_ids association
if association.embed_namespace?
hash = hash[association.embed_namespace] ||= {}
hash[association.key] = ids
else
hash[association.key] = ids
end
elsif association.embed_objects?
if association.embed_namespace?
hash = hash[association.embed_namespace] ||= {}
end
hash[association.embedded_key] = serialize association, options
end
end
end
end
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#attributes ⇒ Object
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# File 'lib/active_model/serializer.rb', line 168
def attributes
filter(self.class._attributes.dup).each_with_object({}) do |name, hash|
hash[name] = send(name)
end
end
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#build_serializer(association) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 240
def build_serializer(association)
object = send(association.name)
association.build_serializer(object, association_options_for_serializer(association))
end
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#convert_keys(hash) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 280
def convert_keys(hash)
Hash[hash.map do |k,v|
key = if k.is_a?(Symbol)
format_key(k).to_sym
else
format_key(k)
end
[key ,v]
end]
end
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#embedded_in_root_associations ⇒ Object
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# File 'lib/active_model/serializer.rb', line 207
def embedded_in_root_associations
associations = self.class._associations
included_associations = filter(associations.keys)
associations.each_with_object({}) do |(name, association), hash|
if included_associations.include? name
association_serializer = build_serializer(association)
hash.merge!(association_serializer.embedded_in_root_associations) do |key, oldval, newval|
if oldval.respond_to?(:to_ary)
[oldval, newval].flatten.uniq
else
oldval.merge(newval) { |_, oldval, newval| [oldval, newval].flatten.uniq }
end
end
if association.embed_in_root?
if association.embed_in_root_key?
hash = hash[association.embed_in_root_key] ||= {}
end
serialized_data = association_serializer.serializable_object
key = association.root_key
if hash.has_key?(key)
hash[key].concat(serialized_data).uniq!
else
hash[key] = serialized_data
end
end
end
end
end
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#filter(keys) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 197
def filter(keys)
if @only
keys & @only
elsif @except
keys - @except
else
keys
end
end
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# File 'lib/active_model/serializer.rb', line 272
def format_key(key)
if key_format == :lower_camel
key.to_s.camelize(:lower)
else
key
end
end
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#json_key ⇒ Object
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# File 'lib/active_model/serializer.rb', line 158
def json_key
key = if root == true || root.nil?
self.class.root_name
else
root
end
key_format == :lower_camel && key.present? ? key.camelize(:lower) : key
end
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#serializable_object(options = {}) ⇒ Object
Also known as:
serializable_hash
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# File 'lib/active_model/serializer.rb', line 297
def serializable_object(options={})
self.serialization_options = options
return @wrap_in_array ? [] : nil if @object.nil?
hash = attributes
hash.merge! associations(options)
hash = convert_keys(hash) if key_format.present?
hash = { :type => type_name(@object), type_name(@object) => hash } if @polymorphic
@wrap_in_array ? [hash] : hash
end
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#serialize(association, options = {}) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 255
def serialize(association,options={})
build_serializer(association).serializable_object(options)
end
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#serialize_id(elem, association) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 308
def serialize_id(elem, association)
id = elem.read_attribute_for_serialization(association.embed_key)
association.polymorphic? ? { id: id, type: type_name(elem) } : id
end
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#serialize_ids(association) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 259
def serialize_ids(association)
associated_data = send(association.name)
if associated_data.respond_to?(:to_ary)
associated_data.map { |elem| serialize_id(elem, association) }
else
serialize_id(associated_data, association) if associated_data
end
end
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#type_name(elem) ⇒ Object
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# File 'lib/active_model/serializer.rb', line 313
def type_name(elem)
elem.class.to_s.demodulize.underscore.to_sym
end
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