text/plain allowed in request body (#1029)

operation.go

@@ -313,11 +313,15 @@ func (operation *Operation) ParseParamComment(commentLine string, astFile *ast.F
 			return nil
 		}
 	case "body":
-		schema, err := operation.parseAPIObjectSchema(objectType, refType, astFile)
-		if err != nil {
-			return err
+		if objectType == PRIMITIVE {
+			param.Schema = PrimitiveSchema(refType)
+		} else {
+			schema, err := operation.parseAPIObjectSchema(objectType, refType, astFile)
+			if err != nil {
+				return err
+			}
+			param.Schema = schema
 		}
-		param.Schema = schema
 	default:
 		return fmt.Errorf("%s is not supported paramType", paramType)
 	}

operation_test.go

@@ -1256,6 +1256,32 @@ func TestParseParamCommentByBodyType(t *testing.T) {
 	assert.Equal(t, expected, string(b))
 }
 
+func TestParseParamCommentByBodyTextPlain(t *testing.T) {
+	t.Parallel()
+
+	comment := `@Param text body string true "Text to process"`
+	operation := NewOperation(nil)
+
+	err := operation.ParseComment(comment, nil)
+
+	assert.NoError(t, err)
+	b, _ := json.MarshalIndent(operation, "", "    ")
+	expected := `{
+    "parameters": [
+        {
+            "description": "Text to process",
+            "name": "text",
+            "in": "body",
+            "required": true,
+            "schema": {
+                "type": "string"
+            }
+        }
+    ]
+}`
+	assert.Equal(t, expected, string(b))
+}
+
 func TestParseParamCommentByBodyTypeWithDeepNestedFields(t *testing.T) {
 	t.Parallel()