fix outer enum number bug elixir generator (#20592)

modules/openapi-generator/src/main/resources/elixir/deserializer.ex.mustache

@@ -94,10 +94,6 @@ defmodule {{moduleName}}.Deserializer do
   defp to_struct(value, module)
   defp to_struct(nil, _), do: nil
   
-  defp to_struct(binary, module) when is_binary(binary) and is_atom(module) do
-    module.decode(binary)
-  end
-
   defp to_struct(list, module) when is_list(list) and is_atom(module) do
     Enum.map(list, &to_struct(&1, module))
   end
@@ -113,4 +109,8 @@ defmodule {{moduleName}}.Deserializer do
     end)
     |> module.decode()
   end
+
+  defp to_struct(value, module) when is_atom(module) do
+    module.decode(value)
+  end
 end

samples/client/petstore/elixir/lib/openapi_petstore/deserializer.ex

@@ -96,10 +96,6 @@ defmodule OpenapiPetstore.Deserializer do
   defp to_struct(value, module)
   defp to_struct(nil, _), do: nil
   
-  defp to_struct(binary, module) when is_binary(binary) and is_atom(module) do
-    module.decode(binary)
-  end
-
   defp to_struct(list, module) when is_list(list) and is_atom(module) do
     Enum.map(list, &to_struct(&1, module))
   end
@@ -115,4 +111,8 @@ defmodule OpenapiPetstore.Deserializer do
     end)
     |> module.decode()
   end
+
+  defp to_struct(value, module) when is_atom(module) do
+    module.decode(value)
+  end
 end

samples/client/petstore/elixir/test/outer_enum_test.exs

@@ -7,7 +7,9 @@ defmodule OuterEnumTest do
   @valid_json """
   {
     "enum_string": "UPPER",
-    "outerEnum": "placed"
+    "enum_number": 1.1,
+    "outerEnum": "placed",
+    "outerEnumInteger": 1
   }
   """
 
@@ -17,7 +19,9 @@ defmodule OuterEnumTest do
              {:ok,
               %EnumTest{
                 enum_string: "UPPER",
-                outerEnum: "placed"
+                enum_number: 1.1,
+                outerEnum: "placed",
+                outerEnumInteger: 1
               }}
   end
 end