From 6930433def83168e95dce7f333bbf22d1e8ac6c6 Mon Sep 17 00:00:00 2001
From: Michael Ramstein <633688+mrmstn@users.noreply.github.com>
Date: Thu, 29 Nov 2018 08:58:32 +0100
Subject: [PATCH] [elixir] Typespec - allow null on optional struct-attributes
 (#1514)

* Typespec - allow null on optional parameters

* Run Petstore for elixir

* considers 'nullable' in model template, fixes 'isRequired'
---
 .../src/main/resources/elixir/model.mustache   |  2 +-
 .../model/additional_properties_class.ex       |  4 ++--
 .../lib/openapi_petstore/model/animal.ex       |  2 +-
 .../lib/openapi_petstore/model/api_response.ex |  6 +++---
 .../model/array_of_array_of_number_only.ex     |  2 +-
 .../model/array_of_number_only.ex              |  2 +-
 .../lib/openapi_petstore/model/array_test.ex   |  6 +++---
 .../openapi_petstore/model/capitalization.ex   | 12 ++++++------
 .../elixir/lib/openapi_petstore/model/cat.ex   |  4 ++--
 .../lib/openapi_petstore/model/category.ex     |  2 +-
 .../lib/openapi_petstore/model/class_model.ex  |  2 +-
 .../lib/openapi_petstore/model/client.ex       |  2 +-
 .../elixir/lib/openapi_petstore/model/dog.ex   |  4 ++--
 .../lib/openapi_petstore/model/enum_arrays.ex  |  4 ++--
 .../lib/openapi_petstore/model/enum_test.ex    |  8 ++++----
 .../model/file_schema_test_class.ex            |  4 ++--
 .../lib/openapi_petstore/model/format_test.ex  | 18 +++++++++---------
 .../model/has_only_read_only.ex                |  4 ++--
 .../lib/openapi_petstore/model/map_test.ex     |  8 ++++----
 ...operties_and_additional_properties_class.ex |  6 +++---
 .../model/model_200_response.ex                |  4 ++--
 .../elixir/lib/openapi_petstore/model/name.ex  |  6 +++---
 .../lib/openapi_petstore/model/number_only.ex  |  2 +-
 .../elixir/lib/openapi_petstore/model/order.ex | 12 ++++++------
 .../openapi_petstore/model/outer_composite.ex  |  6 +++---
 .../elixir/lib/openapi_petstore/model/pet.ex   |  8 ++++----
 .../openapi_petstore/model/read_only_first.ex  |  4 ++--
 .../lib/openapi_petstore/model/return.ex       |  2 +-
 .../model/special_model_name.ex                |  2 +-
 .../elixir/lib/openapi_petstore/model/tag.ex   |  4 ++--
 .../elixir/lib/openapi_petstore/model/user.ex  | 16 ++++++++--------
 31 files changed, 84 insertions(+), 84 deletions(-)

diff --git a/modules/openapi-generator/src/main/resources/elixir/model.mustache b/modules/openapi-generator/src/main/resources/elixir/model.mustache
index 20bcfbdce9c..98c01f9096d 100644
--- a/modules/openapi-generator/src/main/resources/elixir/model.mustache
+++ b/modules/openapi-generator/src/main/resources/elixir/model.mustache
@@ -11,7 +11,7 @@
   ]
 
   @type t :: %__MODULE__{
-    {{#vars}}:"{{baseName}}" => {{{dataType}}}{{#hasMore}},
+    {{#vars}}:"{{baseName}}" => {{{datatype}}}{{#isNullable}} | nil{{/isNullable}}{{^isNullable}}{{^required}} | nil{{/required}}{{/isNullable}}{{#hasMore}},
     {{/hasMore}}{{/vars}}
   }
 end
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/additional_properties_class.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/additional_properties_class.ex
index 0921cc583f8..837bf62a7ce 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/additional_properties_class.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/additional_properties_class.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.AdditionalPropertiesClass do
   ]
 
   @type t :: %__MODULE__{
-    :"map_property" => %{optional(String.t) => String.t},
-    :"map_of_map_property" => %{optional(String.t) => %{optional(String.t) => String.t}}
+    :"map_property" => %{optional(String.t) => String.t} | nil,
+    :"map_of_map_property" => %{optional(String.t) => %{optional(String.t) => String.t}} | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/animal.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/animal.ex
index 27e45bc5ead..deb93a04d0e 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/animal.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/animal.ex
@@ -15,7 +15,7 @@ defmodule OpenapiPetstore.Model.Animal do
 
   @type t :: %__MODULE__{
     :"className" => String.t,
-    :"color" => String.t
+    :"color" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/api_response.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/api_response.ex
index 27a6813ff20..7dc34e32ad7 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/api_response.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/api_response.ex
@@ -15,9 +15,9 @@ defmodule OpenapiPetstore.Model.ApiResponse do
   ]
 
   @type t :: %__MODULE__{
-    :"code" => integer(),
-    :"type" => String.t,
-    :"message" => String.t
+    :"code" => integer() | nil,
+    :"type" => String.t | nil,
+    :"message" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_array_of_number_only.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_array_of_number_only.ex
index 1ee202f602f..e126f51109c 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_array_of_number_only.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_array_of_number_only.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.ArrayOfArrayOfNumberOnly do
   ]
 
   @type t :: %__MODULE__{
-    :"ArrayArrayNumber" => [[float()]]
+    :"ArrayArrayNumber" => [[float()]] | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_number_only.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_number_only.ex
index 0be9ae36939..2e8e5355248 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_number_only.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/array_of_number_only.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.ArrayOfNumberOnly do
   ]
 
   @type t :: %__MODULE__{
-    :"ArrayNumber" => [float()]
+    :"ArrayNumber" => [float()] | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/array_test.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/array_test.ex
index d725eb77a19..fbed2547c5e 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/array_test.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/array_test.ex
@@ -15,9 +15,9 @@ defmodule OpenapiPetstore.Model.ArrayTest do
   ]
 
   @type t :: %__MODULE__{
-    :"array_of_string" => [String.t],
-    :"array_array_of_integer" => [[integer()]],
-    :"array_array_of_model" => [[ReadOnlyFirst]]
+    :"array_of_string" => [String.t] | nil,
+    :"array_array_of_integer" => [[integer()]] | nil,
+    :"array_array_of_model" => [[ReadOnlyFirst]] | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/capitalization.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/capitalization.ex
index 7b303458fd3..e9627cf3341 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/capitalization.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/capitalization.ex
@@ -18,12 +18,12 @@ defmodule OpenapiPetstore.Model.Capitalization do
   ]
 
   @type t :: %__MODULE__{
-    :"smallCamel" => String.t,
-    :"CapitalCamel" => String.t,
-    :"small_Snake" => String.t,
-    :"Capital_Snake" => String.t,
-    :"SCA_ETH_Flow_Points" => String.t,
-    :"ATT_NAME" => String.t
+    :"smallCamel" => String.t | nil,
+    :"CapitalCamel" => String.t | nil,
+    :"small_Snake" => String.t | nil,
+    :"Capital_Snake" => String.t | nil,
+    :"SCA_ETH_Flow_Points" => String.t | nil,
+    :"ATT_NAME" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/cat.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/cat.ex
index ab4e49e6d80..416bb0a73eb 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/cat.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/cat.ex
@@ -16,8 +16,8 @@ defmodule OpenapiPetstore.Model.Cat do
 
   @type t :: %__MODULE__{
     :"className" => String.t,
-    :"color" => String.t,
-    :"declawed" => boolean()
+    :"color" => String.t | nil,
+    :"declawed" => boolean() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/category.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/category.ex
index 9b1c71be1b6..2d1c853ab49 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/category.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/category.ex
@@ -14,7 +14,7 @@ defmodule OpenapiPetstore.Model.Category do
   ]
 
   @type t :: %__MODULE__{
-    :"id" => integer(),
+    :"id" => integer() | nil,
     :"name" => String.t
   }
 end
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/class_model.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/class_model.ex
index 9b26c5e3e7b..e204556d8b7 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/class_model.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/class_model.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.ClassModel do
   ]
 
   @type t :: %__MODULE__{
-    :"_class" => String.t
+    :"_class" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/client.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/client.ex
index d02cc3e7c06..cd5a452028b 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/client.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/client.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.Client do
   ]
 
   @type t :: %__MODULE__{
-    :"client" => String.t
+    :"client" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/dog.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/dog.ex
index 509f7b8f154..f4a7eae34ab 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/dog.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/dog.ex
@@ -16,8 +16,8 @@ defmodule OpenapiPetstore.Model.Dog do
 
   @type t :: %__MODULE__{
     :"className" => String.t,
-    :"color" => String.t,
-    :"breed" => String.t
+    :"color" => String.t | nil,
+    :"breed" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_arrays.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_arrays.ex
index 367ab0f6f28..d8f98a028a7 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_arrays.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_arrays.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.EnumArrays do
   ]
 
   @type t :: %__MODULE__{
-    :"just_symbol" => String.t,
-    :"array_enum" => [String.t]
+    :"just_symbol" => String.t | nil,
+    :"array_enum" => [String.t] | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_test.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_test.ex
index abc41ec5a80..11e81c98a77 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_test.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/enum_test.ex
@@ -17,11 +17,11 @@ defmodule OpenapiPetstore.Model.EnumTest do
   ]
 
   @type t :: %__MODULE__{
-    :"enum_string" => String.t,
+    :"enum_string" => String.t | nil,
     :"enum_string_required" => String.t,
-    :"enum_integer" => integer(),
-    :"enum_number" => float(),
-    :"outerEnum" => OuterEnum
+    :"enum_integer" => integer() | nil,
+    :"enum_number" => float() | nil,
+    :"outerEnum" => OuterEnum | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/file_schema_test_class.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/file_schema_test_class.ex
index 3a52359a5f0..2c5031ca919 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/file_schema_test_class.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/file_schema_test_class.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.FileSchemaTestClass do
   ]
 
   @type t :: %__MODULE__{
-    :"file" => File,
-    :"files" => [File]
+    :"file" => File | nil,
+    :"files" => [File] | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/format_test.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/format_test.ex
index 144a12a254d..869d7aa4192 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/format_test.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/format_test.ex
@@ -25,18 +25,18 @@ defmodule OpenapiPetstore.Model.FormatTest do
   ]
 
   @type t :: %__MODULE__{
-    :"integer" => integer(),
-    :"int32" => integer(),
-    :"int64" => integer(),
+    :"integer" => integer() | nil,
+    :"int32" => integer() | nil,
+    :"int64" => integer() | nil,
     :"number" => float(),
-    :"float" => float(),
-    :"double" => float(),
-    :"string" => String.t,
+    :"float" => float() | nil,
+    :"double" => float() | nil,
+    :"string" => String.t | nil,
     :"byte" => binary(),
-    :"binary" => String.t,
+    :"binary" => String.t | nil,
     :"date" => Date.t,
-    :"dateTime" => DateTime.t,
-    :"uuid" => String.t,
+    :"dateTime" => DateTime.t | nil,
+    :"uuid" => String.t | nil,
     :"password" => String.t
   }
 end
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/has_only_read_only.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/has_only_read_only.ex
index aea5065c090..1a1fa302edb 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/has_only_read_only.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/has_only_read_only.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.HasOnlyReadOnly do
   ]
 
   @type t :: %__MODULE__{
-    :"bar" => String.t,
-    :"foo" => String.t
+    :"bar" => String.t | nil,
+    :"foo" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/map_test.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/map_test.ex
index d3870aa0075..726814dd817 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/map_test.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/map_test.ex
@@ -16,10 +16,10 @@ defmodule OpenapiPetstore.Model.MapTest do
   ]
 
   @type t :: %__MODULE__{
-    :"map_map_of_string" => %{optional(String.t) => %{optional(String.t) => String.t}},
-    :"map_of_enum_string" => %{optional(String.t) => String.t},
-    :"direct_map" => %{optional(String.t) => boolean()},
-    :"indirect_map" => %{optional(String.t) => boolean()}
+    :"map_map_of_string" => %{optional(String.t) => %{optional(String.t) => String.t}} | nil,
+    :"map_of_enum_string" => %{optional(String.t) => String.t} | nil,
+    :"direct_map" => %{optional(String.t) => boolean()} | nil,
+    :"indirect_map" => %{optional(String.t) => boolean()} | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/mixed_properties_and_additional_properties_class.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/mixed_properties_and_additional_properties_class.ex
index 014b696ff6d..3603ec4f6bb 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/mixed_properties_and_additional_properties_class.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/mixed_properties_and_additional_properties_class.ex
@@ -15,9 +15,9 @@ defmodule OpenapiPetstore.Model.MixedPropertiesAndAdditionalPropertiesClass do
   ]
 
   @type t :: %__MODULE__{
-    :"uuid" => String.t,
-    :"dateTime" => DateTime.t,
-    :"map" => %{optional(String.t) => Animal}
+    :"uuid" => String.t | nil,
+    :"dateTime" => DateTime.t | nil,
+    :"map" => %{optional(String.t) => Animal} | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/model_200_response.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/model_200_response.ex
index e3764d66ea2..2bc6d152906 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/model_200_response.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/model_200_response.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.Model200Response do
   ]
 
   @type t :: %__MODULE__{
-    :"name" => integer(),
-    :"class" => String.t
+    :"name" => integer() | nil,
+    :"class" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/name.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/name.ex
index 1b4c97a8060..cd2fdce24d0 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/name.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/name.ex
@@ -17,9 +17,9 @@ defmodule OpenapiPetstore.Model.Name do
 
   @type t :: %__MODULE__{
     :"name" => integer(),
-    :"snake_case" => integer(),
-    :"property" => String.t,
-    :"123Number" => integer()
+    :"snake_case" => integer() | nil,
+    :"property" => String.t | nil,
+    :"123Number" => integer() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/number_only.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/number_only.ex
index 84e1ae57760..825553cf9f3 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/number_only.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/number_only.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.NumberOnly do
   ]
 
   @type t :: %__MODULE__{
-    :"JustNumber" => float()
+    :"JustNumber" => float() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/order.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/order.ex
index 3f6f5c81314..936a7039dce 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/order.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/order.ex
@@ -18,12 +18,12 @@ defmodule OpenapiPetstore.Model.Order do
   ]
 
   @type t :: %__MODULE__{
-    :"id" => integer(),
-    :"petId" => integer(),
-    :"quantity" => integer(),
-    :"shipDate" => DateTime.t,
-    :"status" => String.t,
-    :"complete" => boolean()
+    :"id" => integer() | nil,
+    :"petId" => integer() | nil,
+    :"quantity" => integer() | nil,
+    :"shipDate" => DateTime.t | nil,
+    :"status" => String.t | nil,
+    :"complete" => boolean() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/outer_composite.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/outer_composite.ex
index 00c4df9228e..04143a20a57 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/outer_composite.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/outer_composite.ex
@@ -15,9 +15,9 @@ defmodule OpenapiPetstore.Model.OuterComposite do
   ]
 
   @type t :: %__MODULE__{
-    :"my_number" => float(),
-    :"my_string" => String.t,
-    :"my_boolean" => boolean()
+    :"my_number" => float() | nil,
+    :"my_string" => String.t | nil,
+    :"my_boolean" => boolean() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/pet.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/pet.ex
index 8f2802d5953..4fdcdc95a8e 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/pet.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/pet.ex
@@ -18,12 +18,12 @@ defmodule OpenapiPetstore.Model.Pet do
   ]
 
   @type t :: %__MODULE__{
-    :"id" => integer(),
-    :"category" => Category,
+    :"id" => integer() | nil,
+    :"category" => Category | nil,
     :"name" => String.t,
     :"photoUrls" => [String.t],
-    :"tags" => [Tag],
-    :"status" => String.t
+    :"tags" => [Tag] | nil,
+    :"status" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/read_only_first.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/read_only_first.ex
index 942bb6045e8..bfd2dda2072 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/read_only_first.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/read_only_first.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.ReadOnlyFirst do
   ]
 
   @type t :: %__MODULE__{
-    :"bar" => String.t,
-    :"baz" => String.t
+    :"bar" => String.t | nil,
+    :"baz" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/return.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/return.ex
index ad2765dbd12..8a2102c5989 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/return.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/return.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.Return do
   ]
 
   @type t :: %__MODULE__{
-    :"return" => integer()
+    :"return" => integer() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/special_model_name.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/special_model_name.ex
index e4bed9810c6..429129b42a0 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/special_model_name.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/special_model_name.ex
@@ -13,7 +13,7 @@ defmodule OpenapiPetstore.Model.SpecialModelName do
   ]
 
   @type t :: %__MODULE__{
-    :"$special[property.name]" => integer()
+    :"$special[property.name]" => integer() | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/tag.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/tag.ex
index 720f19b309b..5dd3bac7502 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/tag.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/tag.ex
@@ -14,8 +14,8 @@ defmodule OpenapiPetstore.Model.Tag do
   ]
 
   @type t :: %__MODULE__{
-    :"id" => integer(),
-    :"name" => String.t
+    :"id" => integer() | nil,
+    :"name" => String.t | nil
   }
 end
 
diff --git a/samples/client/petstore/elixir/lib/openapi_petstore/model/user.ex b/samples/client/petstore/elixir/lib/openapi_petstore/model/user.ex
index 17cfecea713..faaf4ab9a96 100644
--- a/samples/client/petstore/elixir/lib/openapi_petstore/model/user.ex
+++ b/samples/client/petstore/elixir/lib/openapi_petstore/model/user.ex
@@ -20,14 +20,14 @@ defmodule OpenapiPetstore.Model.User do
   ]
 
   @type t :: %__MODULE__{
-    :"id" => integer(),
-    :"username" => String.t,
-    :"firstName" => String.t,
-    :"lastName" => String.t,
-    :"email" => String.t,
-    :"password" => String.t,
-    :"phone" => String.t,
-    :"userStatus" => integer()
+    :"id" => integer() | nil,
+    :"username" => String.t | nil,
+    :"firstName" => String.t | nil,
+    :"lastName" => String.t | nil,
+    :"email" => String.t | nil,
+    :"password" => String.t | nil,
+    :"phone" => String.t | nil,
+    :"userStatus" => integer() | nil
   }
 end