Fix deserialization middleware + generator. (#8)

Author: beauby

lib/generators/jsonapi/deserializable/templates/deserializable.rb.erb

@@ -1,20 +1,18 @@
 <% module_namespacing do -%>
 class Deserializable<%= class_name %> < JSONAPI::Deserializable::Resource
   id
-
-<% attr_names.each do |attr| -%>
+<% attr_names.each do |attr| %>
   attribute :<%= attr %>
 <% end -%>
-
-<% has_one_rels.each do |reflection| -%>
+<% has_one_rels.each do |reflection| %>
   has_one :<%= reflection.name %> do |rel, id, type|
     field <%= has_one_id_field_name(reflection.name) %>: id
 <% if reflection.polymorphic? -%>
     field <%= has_one_type_field_name(reflection.name) %>: type
 <% end -%>
   end
 <% end -%>
-<% has_many_rels.each do |reflection| -%>
+<% has_many_rels.each do |reflection| %>
   has_many :<%= reflection.name %> do |rel, ids, types|
     field <%= has_many_id_field_name(reflection.name) %>: ids
 <% if reflection.polymorphic? -%>

lib/jsonapi/rails/action_controller.rb

@@ -31,7 +31,8 @@ def deserializable_relationship(key, *args, &block)
       end
 
       class DeserializationMiddleware
-        JSONAPI_KEYS = %w(data meta links jsonapi).freeze
+        REQUEST_PARAMETERS_KEY =
+          'action_dispatch.request.request_parameters'.freeze
         def initialize(app, key, klass)
           @app = app
           @deserializable_key = key
@@ -40,16 +41,12 @@ def initialize(app, key, klass)
 
         def call(env)
           request = Rack::Request.new(env)
-          body = request.params.slice(*JSONAPI_KEYS)
+          body = JSON.parse(request.body.read)
           parser.parse!(body)
           deserialized_hash = @deserializable_class.call(body)
-          jsonapi = {}
-          JSONAPI_KEYS.each do |key|
-            next unless request.params.key?(key)
-            jsonapi[key.to_sym] = request.delete_param(key)
+          (env[REQUEST_PARAMETERS_KEY] ||= {}).tap do |request_parameters|
+            request_parameters[@deserializable_key] = deserialized_hash
           end
-          request.update_param(:_jsonapi, jsonapi)
-          request.update_param(@deserializable_key, deserialized_hash)
 
           @app.call(env)
         end