Add links attribute and gem setup fixes

lib/jsonapi/active_model_error_serializer.rb

@@ -15,6 +15,10 @@ class ActiveModelErrorSerializer < ErrorSerializer
       object.type.to_s.delete("''").parameterize.tr('-', '_')
     end
 
+    attribute :links do
+      { "service-doc": 'https://example.com/docs' }
+    end
+
     attribute :detail do |object, _params|
       object.full_message
     end

lib/jsonapi/error_serializer.rb

@@ -8,7 +8,7 @@ class ErrorSerializer
     set_type :error
 
     # Object/Hash attribute helpers.
-    [:status, :source, :title, :detail, :code].each do |attr_name|
+    [:status, :source, :title, :detail, :code, :links].each do |attr_name|
       attribute attr_name do |object|
         object.try(attr_name) || object.try(:fetch, attr_name, nil)
       end

spec/dummy.rb

@@ -84,7 +84,7 @@ class UserSerializer
 end
 
 class Dummy < Rails::Application
-  secrets.secret_key_base = '_'
+  config.secret_key_base = '_'
   config.hosts << 'www.example.com' if config.respond_to?(:hosts)
 
   routes.draw do

spec/errors_spec.rb

@@ -36,9 +36,10 @@
           {
             'status' => '422',
             'source' => { 'pointer' => '' },
-            'title' => 'Unprocessable Entity',
+            'title' =>  match(/Unprocessable (Entity|Content)/),
             'detail' => nil,
-            'code' => nil
+            'code' => nil,
+            'links' => nil
           }
         )
       end
@@ -63,9 +64,10 @@
           {
             'status' => '422',
             'source' => { 'pointer' => '/data/relationships/user' },
-            'title' => 'Unprocessable Entity',
+            'title' =>  match(/Unprocessable (Entity|Content)/),
             'detail' => expected_detail,
-            'code' => 'blank'
+            'code' => 'blank',
+            'links' => { 'service-doc' => 'https://example.com/docs' }
           }
         )
       end
@@ -85,23 +87,26 @@
             {
               'status' => '422',
               'source' => { 'pointer' => '/data/attributes/title' },
-              'title' => 'Unprocessable Entity',
+              'title' =>  match(/Unprocessable (Entity|Content)/),
               'detail' => 'Title is invalid',
-              'code' => 'invalid'
+              'code' => 'invalid',
+              'links' => { 'service-doc' => 'https://example.com/docs' }
             },
             {
               'status' => '422',
               'source' => { 'pointer' => '/data/attributes/title' },
-              'title' => 'Unprocessable Entity',
+              'title' =>  match(/Unprocessable (Entity|Content)/),
               'detail' => 'Title has typos',
-              'code' => 'invalid'
+              'code' => 'invalid',
+              'links' => { 'service-doc' => 'https://example.com/docs' }
             },
             {
               'status' => '422',
               'source' => { 'pointer' => '/data/attributes/quantity' },
-              'title' => 'Unprocessable Entity',
+              'title' =>  match(/Unprocessable (Entity|Content)/),
               'detail' => 'Quantity must be less than 100',
-              'code' => 'less_than'
+              'code' => 'less_than',
+              'links' => { 'service-doc' => 'https://example.com/docs' }
             }
           )
         end
@@ -121,9 +126,10 @@
             {
               'status' => '422',
               'source' => { 'pointer' => '' },
-              'title' => 'Unprocessable Entity',
+              'title' =>  match(/Unprocessable (Entity|Content)/),
               'detail' => 'Title has slurs',
-              'code' => 'title_has_slurs'
+              'code' => 'title_has_slurs',
+              'links' => { 'service-doc' => 'https://example.com/docs' }
             }
           )
         end
@@ -144,9 +150,10 @@
             {
               'status' => '422',
               'source' => { 'pointer' => '/data/attributes/title' },
-              'title' => 'Unprocessable Entity',
+              'title' =>  match(/Unprocessable (Entity|Content)/),
               'detail' => nil,
-              'code' => nil
+              'code' => nil,
+              'links' => nil
             }
           )
         end
@@ -166,7 +173,8 @@
             'source' => nil,
             'title' => 'Not Found',
             'detail' => nil,
-            'code' => nil
+            'code' => nil,
+            'links' => nil
           }
         )
       end
@@ -185,7 +193,8 @@
             'source' => nil,
             'title' => 'Internal Server Error',
             'detail' => nil,
-            'code' => nil
+            'code' => nil,
+            'links' => nil
           }
         )
       end