Sort query parameters generated from object

operation.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"os"
 	"regexp"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -208,7 +209,13 @@ func (operation *Operation) ParseParamComment(commentLine string, astFile *ast.F
 				}
 				return false
 			}
-			for name, prop := range schema.Properties {
+			orderedNames := make([]string, 0, len(schema.Properties))
+			for k := range schema.Properties {
+				orderedNames = append(orderedNames, k)
+			}
+			sort.Strings(orderedNames)
+			for _, name := range orderedNames {
+				prop := schema.Properties[name]
 				if len(prop.Type) == 0 {
 					continue
 				}
@@ -232,6 +239,11 @@ func (operation *Operation) ParseParamComment(commentLine string, astFile *ast.F
 					Println(fmt.Sprintf("skip field [%s] in %s is not supported type for %s", name, refType, paramType))
 					continue
 				}
+				param.Nullable = prop.Nullable
+				param.Format = prop.Format
+				param.Default = prop.Default
+				param.Example = prop.Example
+				param.Extensions = prop.Extensions
 				param.CommonValidations.Maximum = prop.Maximum
 				param.CommonValidations.Minimum = prop.Minimum
 				param.CommonValidations.ExclusiveMaximum = prop.ExclusiveMaximum

parser_test.go

@@ -3028,6 +3028,42 @@ func Fun()  {
 
 }
 `
+	expected := `{
+    "info": {
+        "contact": {},
+        "license": {}
+    },
+    "paths": {
+        "/test": {
+            "get": {
+                "parameters": [
+                    {
+                        "type": "integer",
+                        "name": "age",
+                        "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "name": "name",
+                        "in": "query"
+                    },
+                    {
+                        "type": "array",
+                        "items": {
+                            "type": "string"
+                        },
+                        "name": "teachers",
+                        "in": "query"
+                    }
+                ],
+                "responses": {
+                    "200": {}
+                }
+            }
+        }
+    }
+}`
+
 	f, err := goparser.ParseFile(token.NewFileSet(), "", src, goparser.ParseComments)
 	assert.NoError(t, err)
 
@@ -3036,7 +3072,8 @@ func Fun()  {
 	err = p.ParseRouterAPIInfo("", f)
 	assert.NoError(t, err)
 
-	assert.Equal(t, 3, len(p.swagger.Paths.Paths["/test"].Get.Parameters))
+	b, _ := json.MarshalIndent(p.swagger, "", "    ")
+	assert.Equal(t, expected, string(b))
 }
 
 func TestParseRenamedStructDefinition(t *testing.T) {