added check for polymorphic types coming through as non objects

renderer was panicing with strangely shaped schemas.

renderer/schema_renderer.go

@@ -320,10 +320,15 @@ func (wr *SchemaRenderer) DiveIntoSchema(schema *base.Schema, key string, struct
 			for _, allOfSchema := range allOf {
 				allOfCompiled := allOfSchema.Schema()
 				wr.DiveIntoSchema(allOfCompiled, allOfType, allOfMap, depth+1)
-				for k, v := range allOfMap[allOfType].(map[string]any) {
+				if m, ok := allOfMap[allOfType].(map[string]any); ok {
+					for k, v := range m {
 						propertyMap[k] = v
 					}
 				}
+				if m, ok := allOfMap[allOfType].(string); ok {
+					propertyMap[allOfType] = m
+				}
+			}
 		}
 
 		// handle dependentSchemas
@@ -349,10 +354,15 @@ func (wr *SchemaRenderer) DiveIntoSchema(schema *base.Schema, key string, struct
 			oneOfMap := make(map[string]any)
 			oneOfCompiled := oneOf[0].Schema()
 			wr.DiveIntoSchema(oneOfCompiled, oneOfType, oneOfMap, depth+1)
-			for k, v := range oneOfMap[oneOfType].(map[string]any) {
+			if m, ok := oneOfMap[oneOfType].(map[string]any); ok {
+				for k, v := range m {
 					propertyMap[k] = v
 				}
 			}
+			if m, ok := oneOfMap[oneOfType].(string); ok {
+				propertyMap[oneOfType] = m
+			}
+		}
 
 		// handle anyOf
 		anyOf := schema.AnyOf
@@ -360,10 +370,15 @@ func (wr *SchemaRenderer) DiveIntoSchema(schema *base.Schema, key string, struct
 			anyOfMap := make(map[string]any)
 			anyOfCompiled := anyOf[0].Schema()
 			wr.DiveIntoSchema(anyOfCompiled, anyOfType, anyOfMap, depth+1)
-			for k, v := range anyOfMap[anyOfType].(map[string]any) {
+			if m, ok := anyOfMap[anyOfType].(map[string]any); ok {
+				for k, v := range m {
 					propertyMap[k] = v
 				}
 			}
+			if m, ok := anyOfMap[anyOfType].(string); ok {
+				propertyMap[anyOfType] = m
+			}
+		}
 		structure[key] = propertyMap
 		return
 	}