Add failing test for #437

Give person a ```belongs_to``` association to group for testing
Fix for #437

lib/ransack/translate.rb

@@ -100,9 +100,9 @@ module Ransack
     def self.build_interpolations(associated_class)
       {
         :attr_fallback_name => attr_fallback_name(associated_class),
-        :association_name   => association_name 
+        :association_name   => association_name
       }
-      .reject! { |_, value| value.nil? }
+      .reject { |_, value| value.nil? }
     end
 
     def self.attr_fallback_name(associated_class)

spec/ransack/helpers/form_builder_spec.rb

@@ -43,9 +43,30 @@ module Ransack
 
       describe '#label' do
 
-        it 'localizes attribute names' do
-          html = @f.label :name_cont
-          expect(html).to match /Full Name contains/
+        context 'with direct model attributes' do
+          it 'localizes attribute names' do
+            html = @f.label :name_cont
+            expect(html).to match /Full Name contains/
+          end
+
+          it 'falls back to column name when no translation' do
+            html = @f.label :email_cont
+            expect(html).to match /Email contains/
+          end
+        end
+
+        context 'with has_many association attributes' do
+          it 'falls back to associated model + column name when no translation' do
+            html = @f.label :article_title_cont
+            expect(html).to match /Article title contains/
+          end
+        end
+
+        context 'with belongs_to association attributes' do
+          it 'falls back to associated model + column name when no translation' do
+            html = @f.label :group_name_cont
+            expect(html).to match /Group name contains/
+          end
         end
 
       end

spec/support/schema.rb

@@ -22,6 +22,10 @@ else
   )
 end
 
+class Group < ActiveRecord::Base
+  has_many :people
+end
+
 class Person < ActiveRecord::Base
   if ActiveRecord::VERSION::MAJOR == 3
     default_scope order('id DESC')
@@ -29,6 +33,7 @@ class Person < ActiveRecord::Base
     default_scope { order(id: :desc) }
   end
   belongs_to :parent, :class_name => 'Person', :foreign_key => :parent_id
+  belongs_to :group
   has_many   :children, :class_name => 'Person', :foreign_key => :parent_id
   has_many   :articles
   has_many   :comments
@@ -126,8 +131,14 @@ module Schema
     ActiveRecord::Migration.verbose = false
 
     ActiveRecord::Schema.define do
+      create_table :groups, :force => true do |t|
+        t.string   :name
+        t.timestamps null: false
+      end
+
       create_table :people, :force => true do |t|
         t.integer  :parent_id
+        t.integer  :group_id
         t.string   :name
         t.string   :email
         t.string   :only_search