diff --git a/modules/swagger-codegen/src/main/resources/ruby/model.mustache b/modules/swagger-codegen/src/main/resources/ruby/model.mustache
index 1091ab5174a..35742384c26 100644
--- a/modules/swagger-codegen/src/main/resources/ruby/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/ruby/model.mustache
@@ -43,6 +43,19 @@ module {{moduleName}}
       @{{{name}}} = {{{name}}}
     end
 {{/isEnum}}{{/vars}}
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class{{#vars}} &&
+          {{name}} == o.{{name}}{{/vars}}
+    end
+
+    def eql?(o)
+      self == o
+    end
+
+    def hash
+      [{{#vars}}{{name}}{{#hasMore}}, {{/hasMore}}{{/vars}}].hash
+    end
   end
 {{/model}}
 {{/models}}
diff --git a/samples/client/petstore/java/default/src/test/java/io/swagger/petstore/test/PetApiTest.java b/samples/client/petstore/java/default/src/test/java/io/swagger/petstore/test/PetApiTest.java
index 0dd8b310df9..c0bee9328d5 100644
--- a/samples/client/petstore/java/default/src/test/java/io/swagger/petstore/test/PetApiTest.java
+++ b/samples/client/petstore/java/default/src/test/java/io/swagger/petstore/test/PetApiTest.java
@@ -179,19 +179,25 @@ public class PetApiTest {
         Pet pet1 = new Pet();
         Pet pet2 = new Pet();
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
 
         pet2.setName("really-happy");
         pet2.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertFalse(pet1.equals(pet2));
-        assertFalse(pet1.equals(pet2));
+        assertFalse(pet2.equals(pet1));
         assertFalse(pet1.hashCode() == (pet2.hashCode()));
+        assertTrue(pet2.equals(pet2));
+        assertTrue(pet2.hashCode() == pet2.hashCode());
 
         pet1.setName("really-happy");
         pet1.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
     }
 
diff --git a/samples/client/petstore/java/jersey2/src/test/java/io/swagger/petstore/test/PetApiTest.java b/samples/client/petstore/java/jersey2/src/test/java/io/swagger/petstore/test/PetApiTest.java
index 0dd8b310df9..c0bee9328d5 100644
--- a/samples/client/petstore/java/jersey2/src/test/java/io/swagger/petstore/test/PetApiTest.java
+++ b/samples/client/petstore/java/jersey2/src/test/java/io/swagger/petstore/test/PetApiTest.java
@@ -179,19 +179,25 @@ public class PetApiTest {
         Pet pet1 = new Pet();
         Pet pet2 = new Pet();
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
 
         pet2.setName("really-happy");
         pet2.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertFalse(pet1.equals(pet2));
-        assertFalse(pet1.equals(pet2));
+        assertFalse(pet2.equals(pet1));
         assertFalse(pet1.hashCode() == (pet2.hashCode()));
+        assertTrue(pet2.equals(pet2));
+        assertTrue(pet2.hashCode() == pet2.hashCode());
 
         pet1.setName("really-happy");
         pet1.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
     }
 
diff --git a/samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/petstore/test/PetApiTest.java b/samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/petstore/test/PetApiTest.java
index b0997a86335..b6d8286d7ef 100644
--- a/samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/petstore/test/PetApiTest.java
+++ b/samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/petstore/test/PetApiTest.java
@@ -277,19 +277,25 @@ public class PetApiTest {
         Pet pet1 = new Pet();
         Pet pet2 = new Pet();
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
 
         pet2.setName("really-happy");
         pet2.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertFalse(pet1.equals(pet2));
-        assertFalse(pet1.equals(pet2));
+        assertFalse(pet2.equals(pet1));
         assertFalse(pet1.hashCode() == (pet2.hashCode()));
+        assertTrue(pet2.equals(pet2));
+        assertTrue(pet2.hashCode() == pet2.hashCode());
 
         pet1.setName("really-happy");
         pet1.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
     }
 
diff --git a/samples/client/petstore/java/retrofit/src/test/java/io/swagger/petstore/test/PetApiTest.java b/samples/client/petstore/java/retrofit/src/test/java/io/swagger/petstore/test/PetApiTest.java
index 51d84c5cff4..1ff1dbb10e2 100644
--- a/samples/client/petstore/java/retrofit/src/test/java/io/swagger/petstore/test/PetApiTest.java
+++ b/samples/client/petstore/java/retrofit/src/test/java/io/swagger/petstore/test/PetApiTest.java
@@ -148,19 +148,25 @@ public class PetApiTest {
         Pet pet1 = new Pet();
         Pet pet2 = new Pet();
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
 
         pet2.setName("really-happy");
         pet2.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertFalse(pet1.equals(pet2));
-        assertFalse(pet1.equals(pet2));
+        assertFalse(pet2.equals(pet1));
         assertFalse(pet1.hashCode() == (pet2.hashCode()));
+        assertTrue(pet2.equals(pet2));
+        assertTrue(pet2.hashCode() == pet2.hashCode());
 
         pet1.setName("really-happy");
         pet1.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
     }
 
diff --git a/samples/client/petstore/java/retrofit2/src/test/java/io/swagger/petstore/test/PetApiTest.java b/samples/client/petstore/java/retrofit2/src/test/java/io/swagger/petstore/test/PetApiTest.java
index 309914b434e..8506fc08f5c 100644
--- a/samples/client/petstore/java/retrofit2/src/test/java/io/swagger/petstore/test/PetApiTest.java
+++ b/samples/client/petstore/java/retrofit2/src/test/java/io/swagger/petstore/test/PetApiTest.java
@@ -147,19 +147,25 @@ public class PetApiTest {
         Pet pet1 = new Pet();
         Pet pet2 = new Pet();
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
 
         pet2.setName("really-happy");
         pet2.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertFalse(pet1.equals(pet2));
-        assertFalse(pet1.equals(pet2));
+        assertFalse(pet2.equals(pet1));
         assertFalse(pet1.hashCode() == (pet2.hashCode()));
+        assertTrue(pet2.equals(pet2));
+        assertTrue(pet2.hashCode() == pet2.hashCode());
 
         pet1.setName("really-happy");
         pet1.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
         assertTrue(pet1.equals(pet2));
-        assertTrue(pet1.equals(pet2));
+        assertTrue(pet2.equals(pet1));
+        assertTrue(pet1.hashCode() == pet2.hashCode());
+        assertTrue(pet1.equals(pet1));
         assertTrue(pet1.hashCode() == pet1.hashCode());
     }
 
diff --git a/samples/client/petstore/ruby/lib/petstore/models/category.rb b/samples/client/petstore/ruby/lib/petstore/models/category.rb
index 1e36eac4147..ab5b9cabbaa 100644
--- a/samples/client/petstore/ruby/lib/petstore/models/category.rb
+++ b/samples/client/petstore/ruby/lib/petstore/models/category.rb
@@ -41,5 +41,19 @@ module Petstore
       
     end
 
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          id == o.id &&
+          name == o.name
+    end
+
+    def eql?(o)
+      self == o
+    end
+
+    def hash
+      [id, name].hash
+    end
   end
 end
diff --git a/samples/client/petstore/ruby/lib/petstore/models/order.rb b/samples/client/petstore/ruby/lib/petstore/models/order.rb
index ab6f8f00189..74eab3436e3 100644
--- a/samples/client/petstore/ruby/lib/petstore/models/order.rb
+++ b/samples/client/petstore/ruby/lib/petstore/models/order.rb
@@ -81,5 +81,23 @@ module Petstore
       @status = status
     end
 
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          id == o.id &&
+          pet_id == o.pet_id &&
+          quantity == o.quantity &&
+          ship_date == o.ship_date &&
+          status == o.status &&
+          complete == o.complete
+    end
+
+    def eql?(o)
+      self == o
+    end
+
+    def hash
+      [id, pet_id, quantity, ship_date, status, complete].hash
+    end
   end
 end
diff --git a/samples/client/petstore/ruby/lib/petstore/models/pet.rb b/samples/client/petstore/ruby/lib/petstore/models/pet.rb
index a208cf3f87c..8c5fe6e17e7 100644
--- a/samples/client/petstore/ruby/lib/petstore/models/pet.rb
+++ b/samples/client/petstore/ruby/lib/petstore/models/pet.rb
@@ -85,5 +85,23 @@ module Petstore
       @status = status
     end
 
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          id == o.id &&
+          category == o.category &&
+          name == o.name &&
+          photo_urls == o.photo_urls &&
+          tags == o.tags &&
+          status == o.status
+    end
+
+    def eql?(o)
+      self == o
+    end
+
+    def hash
+      [id, category, name, photo_urls, tags, status].hash
+    end
   end
 end
diff --git a/samples/client/petstore/ruby/lib/petstore/models/tag.rb b/samples/client/petstore/ruby/lib/petstore/models/tag.rb
index 3fb5e1f969c..51439de5846 100644
--- a/samples/client/petstore/ruby/lib/petstore/models/tag.rb
+++ b/samples/client/petstore/ruby/lib/petstore/models/tag.rb
@@ -41,5 +41,19 @@ module Petstore
       
     end
 
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          id == o.id &&
+          name == o.name
+    end
+
+    def eql?(o)
+      self == o
+    end
+
+    def hash
+      [id, name].hash
+    end
   end
 end
diff --git a/samples/client/petstore/ruby/lib/petstore/models/user.rb b/samples/client/petstore/ruby/lib/petstore/models/user.rb
index 3a6d5f354e0..3d20ab95c4f 100644
--- a/samples/client/petstore/ruby/lib/petstore/models/user.rb
+++ b/samples/client/petstore/ruby/lib/petstore/models/user.rb
@@ -89,5 +89,25 @@ module Petstore
       
     end
 
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          id == o.id &&
+          username == o.username &&
+          first_name == o.first_name &&
+          last_name == o.last_name &&
+          email == o.email &&
+          password == o.password &&
+          phone == o.phone &&
+          user_status == o.user_status
+    end
+
+    def eql?(o)
+      self == o
+    end
+
+    def hash
+      [id, username, first_name, last_name, email, password, phone, user_status].hash
+    end
   end
 end
diff --git a/samples/client/petstore/ruby/spec/pet_spec.rb b/samples/client/petstore/ruby/spec/pet_spec.rb
index c9858eca37a..612fc536147 100644
--- a/samples/client/petstore/ruby/spec/pet_spec.rb
+++ b/samples/client/petstore/ruby/spec/pet_spec.rb
@@ -125,5 +125,40 @@ describe "Pet" do
       result = @pet_api.upload_file(10002, file: File.new('hello.txt'), additional_metadata: 'metadata')
       result.should be_nil
     end
+
+    it "should implement eql? and hash" do
+      pet1 = Petstore::Pet.new
+      pet2 = Petstore::Pet.new
+      pet1.should == pet2
+      pet2.should == pet1
+      pet1.eql?(pet2).should == true
+      pet2.eql?(pet1).should == true
+      pet1.hash.should == pet2.hash
+      pet1.should == pet1
+      pet1.eql?(pet1).should == true
+      pet1.hash.should == pet1.hash
+
+      pet1.name = 'really-happy'
+      pet1.photo_urls = ['http://foo.bar.com/1', 'http://foo.bar.com/2']
+      pet1.should_not == pet2
+      pet2.should_not == pet1
+      pet1.eql?(pet2).should == false
+      pet2.eql?(pet1).should == false
+      pet1.hash.should_not == pet2.hash
+      pet1.should == pet1
+      pet1.eql?(pet1).should == true
+      pet1.hash.should == pet1.hash
+
+      pet2.name = 'really-happy'
+      pet2.photo_urls = ['http://foo.bar.com/1', 'http://foo.bar.com/2']
+      pet1.should == pet2
+      pet2.should == pet1
+      pet1.eql?(pet2).should == true
+      pet2.eql?(pet1).should == true
+      pet1.hash.should == pet2.hash
+      pet2.should == pet2
+      pet2.eql?(pet2).should == true
+      pet2.hash.should == pet2.hash
+    end
   end
 end