Merge pull request #14 from gadabout/feature/add-related-to-changesets

Added ability to add relationships to changesets.

lib/lurch/changeset.rb

@@ -1,17 +1,24 @@
 module Lurch
   class Changeset
-    attr_reader :id, :type, :attributes
+    attr_reader :id, :type, :attributes, :relationships
 
     def initialize(type, attributes = {})
       is_resource = type.is_a?(Resource)
       @type = is_resource ? type.type : Lurch.normalize_type(type)
       @id = is_resource ? type.id : nil
       @attributes = attributes
+      @relationships = {}
+    end
+
+    def add_related(relationship_key, related_resources)
+      @relationships[relationship_key.to_sym] = related_resources
+      self
     end
 
     def inspect
       attrs = ["id: #{id.inspect}"]
       attrs = attrs.concat attributes.map { |name, value| "#{name}: #{value.inspect}" }
+      attrs = attrs.concat relationships.map { |name, value| "#{name}: #{value.inspect}" }
       inspection = attrs.join(", ")
       "#<#{self.class}[#{Inflecto.classify(type)}] #{inspection}>"
     end

lib/lurch/payload_builder.rb

@@ -23,7 +23,8 @@ def resource_object_for(resource)
       {
         "id" => resource.id,
         "type" => Inflecto.dasherize(resource.type.to_s),
-        "attributes" => attributes_for(resource)
+        "attributes" => attributes_for(resource),
+        "relationships" => relationships_for(resource)
       }.reject { |_, v| v.nil? || (v.respond_to?(:empty?) && v.empty?) }
     end
 
@@ -32,9 +33,17 @@ def attributes_for(resource)
       dasherize_keys(resource.attributes)
     end
 
+    def relationships_for(resource)
+      return {} if @resource_identifier_only
+      dasherize_keys(resource.relationships) do |value|
+        PayloadBuilder.new(value, true).build
+      end
+    end
+
     def dasherize_keys(attributes)
       attributes.each_with_object({}) do |(key, value), hash|
-        hash[Inflecto.dasherize(key.to_s)] = value
+        new_value = block_given? ? yield(value) : value
+        hash[Inflecto.dasherize(key.to_s)] = new_value
       end
     end
   end

lib/lurch/version.rb

@@ -1,3 +1,3 @@
 module Lurch
-  VERSION = "0.0.13".freeze
+  VERSION = "0.0.14".freeze
 end

spec/lurch/changeset_spec.rb

@@ -1,6 +1,10 @@
 RSpec.describe Lurch::Changeset do
   let(:changeset) { Lurch::Changeset.new(:people) }
 
+  describe "#add_related" do
+    pending "TODO"
+  end
+
   describe "#inspect" do
     subject { changeset.inspect }
     it { is_expected.to be_a(String) }