class Helio::HelioObject
Public Class Methods
# File lib/helio/helio_object.rb, line 24 def self.construct_from(values, opts = {}) values = Helio::Util.symbolize_names(values) # work around protected #initialize_from for now new(values[:id]).send(:initialize_from, values, opts) end
# File lib/helio/helio_object.rb, line 12 def initialize(id = nil, opts = {}) id, @retrieve_params = Util.normalize_id(id) @opts = Util.normalize_opts(opts) @original_values = {} @values = {} # This really belongs in APIResource, but not putting it there allows us # to have a unified inspect method @unsaved_values = Set.new @transient_values = Set.new @values[:id] = id if id end
A protected field is one that doesn't get an accessor assigned to it (i.e. `obj.public = …`) and one which is not allowed to be updated via the class level `Model.update(id, { … })`.
# File lib/helio/helio_object.rb, line 210 def self.protected_fields [] end
This class method has been deprecated in favor of the instance method of the same name.
# File lib/helio/helio_object.rb, line 200 def serialize_params(obj, options = {}) obj.serialize_params(options) end
Private Class Methods
Produces a deep copy of the given object including support for arrays, hashes, and HelioObjects.
# File lib/helio/helio_object.rb, line 431 def self.deep_copy(obj) case obj when Array obj.map { |e| deep_copy(e) } when Hash obj.each_with_object({}) do |(k, v), copy| copy[k] = deep_copy(v) copy end when HelioObject obj.class.construct_from( deep_copy(obj.instance_variable_get(:@values)), obj.instance_variable_get(:@opts).select do |k, _v| Util::OPTS_COPYABLE.include?(k) end ) else obj end end
Public Instance Methods
Determines the equality of two Helio
objects. Helio
objects are considered to be equal if they have the same set of values and each one of those values is the same.
# File lib/helio/helio_object.rb, line 34 def ==(other) other.is_a?(HelioObject) && @values == other.instance_variable_get(:@values) end
# File lib/helio/helio_object.rb, line 95 def [](k) @values[k.to_sym] end
# File lib/helio/helio_object.rb, line 99 def []=(k, v) send(:"#{k}=", v) end
# File lib/helio/helio_object.rb, line 115 def as_json(*a) @values.as_json(*a) end
Indicates whether or not the resource has been deleted on the server. Note that some, but not all, resources can indicate whether they have been deleted.
# File lib/helio/helio_object.rb, line 41 def deleted? @values.fetch(:deleted, false) end
Sets all keys within the HelioObject
as unsaved so that they will be included with an update when serialize_params
is called. This method is also recursive, so any HelioObjects contained as values or which are values in a tenant array are also marked as dirty.
# File lib/helio/helio_object.rb, line 142 def dirty! @unsaved_values = Set.new(@values.keys) @values.each_value do |v| dirty_value!(v) end end
# File lib/helio/helio_object.rb, line 134 def each(&blk) @values.each(&blk) end
# File lib/helio/helio_object.rb, line 49 def inspect id_string = respond_to?(:id) && !id.nil? ? " id=#{id}" : "" "#<#{self.class}:0x#{object_id.to_s(16)}#{id_string}> JSON: " + JSON.pretty_generate(@values) end
# File lib/helio/helio_object.rb, line 103 def keys @values.keys end
Implements custom encoding for Ruby's Marshal. The data produced by this method should be comprehendable by marshal_load
.
This allows us to remove certain features that cannot or should not be serialized.
# File lib/helio/helio_object.rb, line 154 def marshal_dump # The HelioClient instance in @opts is not serializable and is not # really a property of the HelioObject, so we exclude it when # dumping opts = @opts.clone opts.delete(:client) [@values, opts] end
Implements custom decoding for Ruby's Marshal. Consumes data that's produced by marshal_dump
.
# File lib/helio/helio_object.rb, line 165 def marshal_load(data) values, opts = data initialize(values[:id]) initialize_from(values, opts) end
Re-initializes the object based on a hash of values (usually one that's come back from an API call). Adds or removes value accessors as necessary and updates the state of internal data.
Please don't use this method. If you're trying to do mass assignment, try initialize_from
instead.
# File lib/helio/helio_object.rb, line 60 def refresh_from(values, opts, partial = false) initialize_from(values, opts, partial) end
# File lib/helio/helio_object.rb, line 171 def serialize_params(options = {}) update_hash = {} @values.each do |k, v| # There are a few reasons that we may want to add in a parameter for # update: # # 1. The `force` option has been set. # 2. We know that it was modified. # 3. Its value is a HelioObject. A HelioObject may contain modified # values within in that its parent HelioObject doesn't know about. # unsaved = @unsaved_values.include?(k) if options[:force] || unsaved || v.is_a?(HelioObject) update_hash[k.to_sym] = serialize_params_value(@values[k], @original_values[k], unsaved, options[:force], key: k) end end # a `nil` that makes it out of `#serialize_params_value` signals an empty # value that we shouldn't appear in the serialized form of the object update_hash.reject! { |_, v| v.nil? } update_hash end
# File lib/helio/helio_object.rb, line 119 def to_hash maybe_to_hash = lambda do |value| value.respond_to?(:to_hash) ? value.to_hash : value end @values.each_with_object({}) do |(key, value), acc| acc[key] = case value when Array value.map(&maybe_to_hash) else maybe_to_hash.call(value) end end end
# File lib/helio/helio_object.rb, line 111 def to_json(*_a) JSON.generate(@values) end
# File lib/helio/helio_object.rb, line 45 def to_s(*_args) JSON.pretty_generate(to_hash) end
Mass assigns attributes on the model.
This is a version of update_attributes
that takes some extra options for internal use.
Attributes¶ ↑
-
values
- Hash of values to use to update the current attributes of the object. -
opts
- Options forHelioObject
like an API key that will be reused on subsequent API calls.
Options¶ ↑
-
:dirty
- Whether values should be initiated as “dirty” (unsaved) and which applies only to new HelioObjects being initiated under thisHelioObject
. Defaults to true.
# File lib/helio/helio_object.rb, line 83 def update_attributes(values, opts = {}, method_options = {}) # Default to true. TODO: Convert to optional arguments after we're off # 1.9 which will make this quite a bit more clear. dirty = method_options.fetch(:dirty, true) values.each do |k, v| add_accessors([k], values) unless metaclass.method_defined?(k.to_sym) @values[k] = Util.convert_to_helio_object(v, opts) dirty_value!(@values[k]) if dirty @unsaved_values.add(k) end end
# File lib/helio/helio_object.rb, line 107 def values @values.values end
Protected Instance Methods
# File lib/helio/helio_object.rb, line 237 def add_accessors(keys, values) # not available in the #instance_eval below protected_fields = self.class.protected_fields metaclass.instance_eval do keys.each do |k| next if protected_fields.include?(k) next if @@permanent_attributes.include?(k) if k == :method # Object#method is a built-in Ruby method that accepts a symbol # and returns the corresponding Method object. Because the API may # also use `method` as a field name, we check the arity of *args # to decide whether to act as a getter or call the parent method. define_method(k) { |*args| args.empty? ? @values[k] : super(*args) } else define_method(k) { @values[k] } end define_method(:"#{k}=") do |v| if v == "" raise ArgumentError, "You cannot set #{k} to an empty string. " \ "We interpret empty strings as nil in requests. " \ "You may set (object).#{k} = nil to delete the property." end @values[k] = Util.convert_to_helio_object(v, @opts) dirty_value!(@values[k]) @unsaved_values.add(k) end if [FalseClass, TrueClass].include?(values[k].class) define_method(:"#{k}?") { @values[k] } end end end end
Re-initializes the object based on a hash of values (usually one that's come back from an API call). Adds or removes value accessors as necessary and updates the state of internal data.
Protected on purpose! Please do not expose.
Options¶ ↑
-
:values:
Hash used to update accessors and values. -
:opts:
Options forHelioObject
like an API key. -
:partial:
Indicates that the re-initialization should not attempt to remove accessors.
# File lib/helio/helio_object.rb, line 325 def initialize_from(values, opts, partial = false) @opts = Util.normalize_opts(opts) # the `#send` is here so that we can keep this method private @original_values = self.class.send(:deep_copy, values) removed = partial ? Set.new : Set.new(@values.keys - values.keys) added = Set.new(values.keys - @values.keys) # Wipe old state before setting new. This is useful for e.g. updating a # customer, where there is no persistent card parameter. Mark those values # which don't persist as transient remove_accessors(removed) add_accessors(added, values) removed.each do |k| @values.delete(k) @transient_values.add(k) @unsaved_values.delete(k) end update_attributes(values, opts, dirty: false) values.each_key do |k| @transient_values.delete(k) @unsaved_values.delete(k) end self end
# File lib/helio/helio_object.rb, line 216 def metaclass class << self; self; end end
# File lib/helio/helio_object.rb, line 274 def method_missing(name, *args) # TODO: only allow setting in updateable classes. if name.to_s.end_with?("=") attr = name.to_s[0...-1].to_sym # Pull out the assigned value. This is only used in the case of a # boolean value to add a question mark accessor (i.e. `foo?`) for # convenience. val = args.first # the second argument is only required when adding boolean accessors add_accessors([attr], attr => val) begin mth = method(name) rescue NameError raise NoMethodError, "Cannot set #{attr} on this object. HINT: you can't set: #{@@permanent_attributes.to_a.join(', ')}" end return mth.call(args[0]) elsif @values.key?(name) return @values[name] end begin super rescue NoMethodError => e # If we notice the accessed name if our set of transient values we can # give the user a slightly more helpful error message. If not, just # raise right away. raise unless @transient_values.include?(name) raise NoMethodError, e.message + ". HINT: The '#{name}' attribute was set in the past, however. It was then wiped when refreshing the object with the result returned by Helio's API, probably as a result of a save(). The attributes currently available on this object are: #{@values.keys.join(', ')}" end end
# File lib/helio/helio_object.rb, line 220 def remove_accessors(keys) # not available in the #instance_eval below protected_fields = self.class.protected_fields metaclass.instance_eval do keys.each do |k| next if protected_fields.include?(k) next if @@permanent_attributes.include?(k) # Remove methods for the accessor's reader and writer. [k, :"#{k}=", :"#{k}?"].each do |method_name| remove_method(method_name) if method_defined?(method_name) end end end end
# File lib/helio/helio_object.rb, line 309 def respond_to_missing?(symbol, include_private = false) @values && @values.key?(symbol) || super end
# File lib/helio/helio_object.rb, line 356 def serialize_params_value(value, original, unsaved, force, key: nil) if value.nil? "" # The logic here is that essentially any object embedded in another # object that had a `type` is actually an API resource of a different # type that's been included in the response. These other resources must # be updated from their proper endpoints, and therefore they are not # included when serializing even if they've been modified. # # There are _some_ known exceptions though. # # For example, if the value is unsaved (meaning the user has set it), and # it looks like the API resource is persisted with an ID, then we include # the object so that parameters are serialized with a reference to its # ID. # # Another example is that on save API calls it's sometimes desirable to # update a customer's default source by setting a new card (or other) # object with `#source=` and then saving the customer. The # `#save_with_parent` flag to override the default behavior allows us to # handle these exceptions. # # We throw an error if a property was set explicitly but we can't do # anything with it because the integration is probably not working as the # user intended it to. elsif value.is_a?(APIResource) && !value.save_with_parent if !unsaved nil elsif value.respond_to?(:id) && !value.id.nil? value else raise ArgumentError, "Cannot save property `#{key}` containing " \ "an API resource. It doesn't appear to be persisted and is " \ "not marked as `save_with_parent`." end elsif value.is_a?(Array) update = value.map { |v| serialize_params_value(v, nil, true, force) } # This prevents an array that's unchanged from being resent. update if update != serialize_params_value(original, nil, true, force) # Handle a Hash for now, but in the long run we should be able to # eliminate all places where hashes are stored as values internally by # making sure any time one is set, we convert it to a HelioObject. This # will simplify our model by making data within an object more # consistent. # # For now, you can still run into a hash if someone appends one to an # existing array being held by a HelioObject. This could happen for # example by appending a new hash onto `additional_owners` for an # account. elsif value.is_a?(Hash) Util.convert_to_helio_object(value, @opts).serialize_params elsif value.is_a?(HelioObject) update = value.serialize_params(force: force) # If the entire object was replaced, then we need blank each field of # the old object that held a value. The new serialized values will # override any of these empty values. update = empty_values(original).merge(update) if original && unsaved update else value end end
Private Instance Methods
# File lib/helio/helio_object.rb, line 453 def dirty_value!(value) case value when Array value.map { |v| dirty_value!(v) } when HelioObject value.dirty! end end
Returns a hash of empty values for all the values that are in the given HelioObject
.
# File lib/helio/helio_object.rb, line 464 def empty_values(obj) values = case obj when Hash then obj when HelioObject then obj.instance_variable_get(:@values) else raise ArgumentError, "#empty_values got unexpected object type: #{obj.class.name}" end values.each_with_object({}) do |(k, _), update| update[k] = "" end end