fix: faulty free-form object type spec

Author: efcasado

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java

@@ -570,7 +570,11 @@ public String toOperationId(String operationId) {
      */
     @Override
     public String getTypeDeclaration(Schema p) {
-        if (ModelUtils.isArraySchema(p)) {
+        if (ModelUtils.isAnyType(p)) {
+            return "any()";
+        } else if(ModelUtils.isFreeFormObject(p, null)) {
+            return "%{optional(String.t) => any()}";
+        } else if (ModelUtils.isArraySchema(p)) {
             Schema inner = ModelUtils.getSchemaItems(p);
             return "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
@@ -856,6 +860,10 @@ private String normalizeTypeName(String baseType, boolean isPrimitive) {
         private void buildTypespec(CodegenParameter param, StringBuilder sb) {
             if (param.dataType == null) {
                 sb.append("nil");
+            } else if (param.isAnyType) {
+                sb.append("any()");
+            } else if(param.isFreeFormObject) {
+                sb.append("%{optional(String.t) => any()}");
             } else if (param.isArray) {
                 // list(<subtype>)
                 sb.append("list(");
@@ -875,6 +883,10 @@ private void buildTypespec(CodegenProperty property, StringBuilder sb) {
             if (property == null) {
                 LOGGER.error(
                         "CodegenProperty cannot be null. Please report the issue to https://github.com/openapitools/openapi-generator with the spec");
+            } else if (property.isAnyType) {
+                sb.append("any()");
+            } else if(property.isFreeFormObject) {
+                sb.append("%{optional(String.t) => any()}");
             } else if (property.isArray) {
                 sb.append("list(");
                 buildTypespec(property.items, sb);

samples/client/petstore/elixir/lib/openapi_petstore/model/nullable_class.ex

@@ -29,12 +29,12 @@ defmodule OpenapiPetstore.Model.NullableClass do
     :string_prop => String.t | nil,
     :date_prop => Date.t | nil,
     :datetime_prop => DateTime.t | nil,
-    :array_nullable_prop => [map()] | nil,
-    :array_and_items_nullable_prop => [map()] | nil,
-    :array_items_nullable => [map()] | nil,
-    :object_nullable_prop => %{optional(String.t) => map()} | nil,
-    :object_and_items_nullable_prop => %{optional(String.t) => map()} | nil,
-    :object_items_nullable => %{optional(String.t) => map()} | nil
+    :array_nullable_prop => [%{optional(String.t) => any()}] | nil,
+    :array_and_items_nullable_prop => [%{optional(String.t) => any()}] | nil,
+    :array_items_nullable => [%{optional(String.t) => any()}] | nil,
+    :object_nullable_prop => %{optional(String.t) => any()} | nil,
+    :object_and_items_nullable_prop => %{optional(String.t) => any()} | nil,
+    :object_items_nullable => %{optional(String.t) => any()} | nil
   }
 
   alias OpenapiPetstore.Deserializer