From 4cdddbd6e0f57816669ceba03b20a278bf173055 Mon Sep 17 00:00:00 2001
From: Anonymous <anonymous@github.com>
Date: Tue, 4 Jan 2022 18:01:54 +0000
Subject: [PATCH 1/2] Recurse map fields inside structs

---
 util/gconv/gconv_map.go | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/util/gconv/gconv_map.go b/util/gconv/gconv_map.go
index c42f8e007..f448a8d6b 100644
--- a/util/gconv/gconv_map.go
+++ b/util/gconv/gconv_map.go
@@ -323,7 +323,20 @@ func doMapConvertForMapOrStructValue(isRoot bool, value interface{}, recursive b
 						array[i] = doMapConvertForMapOrStructValue(false, rvAttrField.Index(i), recursive, tags...)
 					}
 					dataMap[mapKey] = array
-
+				case reflect.Map:
+					var (
+						mapKeys   = rvAttrField.MapKeys()
+						nestedMap = make(map[string]interface{})
+					)
+					for _, k := range mapKeys {
+						nestedMap[String(k.Interface())] = doMapConvertForMapOrStructValue(
+							false,
+							rvAttrField.MapIndex(k).Interface(),
+							recursive,
+							tags...,
+						)
+					}
+					dataMap[mapKey] = nestedMap
 				default:
 					if rvField.IsValid() {
 						dataMap[mapKey] = reflectValue.Field(i).Interface()

From 343985ad122d03c2d49a56973b11a3d8bcb2fe88 Mon Sep 17 00:00:00 2001
From: Anonymous <anonymous@github.com>
Date: Mon, 10 Jan 2022 18:42:03 +0000
Subject: [PATCH 2/2] Add tests to highlight problem cases previously failing

---
 util/gconv/gconv_z_unit_map_test.go | 69 +++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/util/gconv/gconv_z_unit_map_test.go b/util/gconv/gconv_z_unit_map_test.go
index 000f439bd..c34897909 100644
--- a/util/gconv/gconv_z_unit_map_test.go
+++ b/util/gconv/gconv_z_unit_map_test.go
@@ -7,7 +7,9 @@
 package gconv_test
 
 import (
+	"encoding/json"
 	"github.com/gogf/gf/v2/util/gutil"
+	"gopkg.in/yaml.v3"
 	"testing"
 
 	"github.com/gogf/gf/v2/frame/g"
@@ -407,3 +409,70 @@ func Test_MapDeepWithAttributeTag(t *testing.T) {
 		t.Assert(m["base"].(map[string]interface{})["create_time"], user.CreateTime)
 	})
 }
+
+func Test_MapDeepWithNestedMapAnyAny(t *testing.T) {
+	type User struct {
+		ExtraAttributes g.Map `c:"extra_attributes"`
+	}
+
+	gtest.C(t, func(t *gtest.T) {
+		user := &User{
+			ExtraAttributes: g.Map{
+				"simple_attribute": 123,
+				"map_string_attribute": g.Map{
+					"inner_value": 456,
+				},
+				"map_interface_attribute": g.MapAnyAny{
+					"inner_value": 456,
+					123:           "integer_key_should_be_converted_to_string",
+				},
+			},
+		}
+		m := gconv.MapDeep(user)
+		t.Assert(m, g.Map{
+			"extra_attributes": g.Map{
+				"simple_attribute": 123,
+				"map_string_attribute": g.Map{
+					"inner_value": user.ExtraAttributes["map_string_attribute"].(g.Map)["inner_value"],
+				},
+				"map_interface_attribute": g.Map{
+					"inner_value": user.ExtraAttributes["map_interface_attribute"].(g.MapAnyAny)["inner_value"],
+					"123":         "integer_key_should_be_converted_to_string",
+				},
+			},
+		})
+	})
+
+	type Outer struct {
+		OuterStruct map[string]interface{} `c:"outer_struct" yaml:"outer_struct"`
+		Field3      map[string]interface{} `c:"field3" yaml:"field3"`
+	}
+
+	gtest.C(t, func(t *gtest.T) {
+		problemYaml := []byte(`
+outer_struct:
+  field1: &anchor1
+    inner1: 123
+    inner2: 345
+  field2: 
+    inner3: 456
+    inner4: 789
+    <<: *anchor1
+field3:
+  123: integer_key
+`)
+		parsed := &Outer{}
+
+		err := yaml.Unmarshal(problemYaml, parsed)
+		t.Assert(err, nil)
+
+		_, err = json.Marshal(parsed)
+		t.Assert(err.Error(), "json: unsupported type: map[interface {}]interface {}")
+
+		converted := gconv.MapDeep(parsed)
+		jsonData, err := json.Marshal(converted)
+		t.Assert(err, nil)
+
+		t.Assert(string(jsonData), `{"field3":{"123":"integer_key"},"outer_struct":{"field1":{"inner1":123,"inner2":345},"field2":{"inner1":123,"inner2":345,"inner3":456,"inner4":789}}}`)
+	})
+}