diff --git a/database/gdb/gdb_core.go b/database/gdb/gdb_core.go
index 728d942d6..7ff52956f 100644
--- a/database/gdb/gdb_core.go
+++ b/database/gdb/gdb_core.go
@@ -60,10 +60,11 @@ func (c *Core) Ctx(ctx context.Context) DB {
 // GetCtx returns the context for current DB.
 // It returns `context.Background()` is there's no context previously set.
 func (c *Core) GetCtx() context.Context {
-	if c.ctx != nil {
-		return c.ctx
+	ctx := c.ctx
+	if ctx == nil {
+		ctx = context.TODO()
 	}
-	return c.injectInternalCtxData(context.TODO())
+	return c.injectInternalCtxData(ctx)
 }
 
 // GetCtxTimeout returns the context and cancel function for specified timeout type.
@@ -241,7 +242,7 @@ func (c *Core) GetValue(ctx context.Context, sql string, args ...interface{}) (V
 
 // GetCount queries and returns the count from database.
 func (c *Core) GetCount(ctx context.Context, sql string, args ...interface{}) (int, error) {
-	// If the query fields do not contains function "COUNT",
+	// If the query fields do not contain function "COUNT",
 	// it replaces the sql string and adds the "COUNT" function to the fields.
 	if !gregex.IsMatchString(`(?i)SELECT\s+COUNT\(.+\)\s+FROM`, sql) {
 		sql, _ = gregex.ReplaceString(`(?i)(SELECT)\s+(.+)\s+(FROM)`, `$1 COUNT($2) $3`, sql)
diff --git a/database/gdb/gdb_core_transaction.go b/database/gdb/gdb_core_transaction.go
index 67750f92c..bf5f3751b 100644
--- a/database/gdb/gdb_core_transaction.go
+++ b/database/gdb/gdb_core_transaction.go
@@ -158,6 +158,9 @@ func (tx *TX) transactionKeyForNestedPoint() string {
 // Ctx sets the context for current transaction.
 func (tx *TX) Ctx(ctx context.Context) *TX {
 	tx.ctx = ctx
+	if tx.ctx != nil {
+		tx.ctx = tx.db.GetCore().injectInternalCtxData(tx.ctx)
+	}
 	return tx
 }
 
diff --git a/database/gdb/gdb_core_underlying.go b/database/gdb/gdb_core_underlying.go
index a8bc2ef60..af90cb169 100644
--- a/database/gdb/gdb_core_underlying.go
+++ b/database/gdb/gdb_core_underlying.go
@@ -163,7 +163,7 @@ func (c *Core) sqlParsingHandler(ctx context.Context, in sqlParsingHandlerInput)
 
 // DoCommit commits current sql and arguments to underlying sql driver.
 func (c *Core) DoCommit(ctx context.Context, in DoCommitInput) (out DoCommitOutput, err error) {
-	// Inject internal data into ctx, just for double check.
+	// Inject internal data into ctx, especially for transaction creating.
 	ctx = c.injectInternalCtxData(ctx)
 
 	var (
diff --git a/database/gdb/gdb_model_cache.go b/database/gdb/gdb_model_cache.go
index 7ed513d45..e05d40740 100644
--- a/database/gdb/gdb_model_cache.go
+++ b/database/gdb/gdb_model_cache.go
@@ -8,9 +8,13 @@ package gdb
 
 import (
 	"context"
+	"fmt"
 	"time"
 
+	"github.com/gogf/gf/v2/crypto/gmd5"
 	"github.com/gogf/gf/v2/internal/intlog"
+	"github.com/gogf/gf/v2/internal/json"
+	"github.com/gogf/gf/v2/util/gconv"
 )
 
 type CacheOption struct {
@@ -30,6 +34,11 @@ type CacheOption struct {
 	Force bool
 }
 
+type selectCacheItem struct {
+	Result            Result
+	FirstResultColumn string
+}
+
 // Cache sets the cache feature for the model. It caches the result of the sql, which means
 // if there's another same sql request, it just reads and returns the result from cache, it
 // but not committed and executed into the database.
@@ -43,12 +52,85 @@ func (m *Model) Cache(option CacheOption) *Model {
 	return model
 }
 
-// checkAndRemoveCache checks and removes the cache in insert/update/delete statement if
+// checkAndRemoveSelectCache checks and removes the cache in insert/update/delete statement if
 // cache feature is enabled.
-func (m *Model) checkAndRemoveCache(ctx context.Context) {
+func (m *Model) checkAndRemoveSelectCache(ctx context.Context) {
 	if m.cacheEnabled && m.cacheOption.Duration < 0 && len(m.cacheOption.Name) > 0 {
 		if _, err := m.db.GetCache().Remove(ctx, m.cacheOption.Name); err != nil {
 			intlog.Errorf(ctx, `%+v`, err)
 		}
 	}
 }
+
+func (m *Model) getSelectResultFromCache(ctx context.Context, sql string, args ...interface{}) (result Result, err error) {
+	if !m.cacheEnabled || m.tx != nil {
+		return
+	}
+	var (
+		ok        bool
+		cacheItem *selectCacheItem
+		cacheKey  = m.makeSelectCacheKey(sql, args...)
+		cacheObj  = m.db.GetCache()
+	)
+	defer func() {
+		if cacheItem != nil {
+			if internalData := m.db.GetCore().getInternalCtxDataFromCtx(ctx); internalData != nil {
+				if internalData.FirstResultColumn == "" {
+					internalData.FirstResultColumn = cacheItem.FirstResultColumn
+				}
+			}
+		}
+	}()
+	if v, _ := cacheObj.Get(ctx, cacheKey); !v.IsNil() {
+		if cacheItem, ok = v.Val().(*selectCacheItem); ok {
+			// In-memory cache.
+			return cacheItem.Result, nil
+		} else if err = json.UnmarshalUseNumber(v.Bytes(), &cacheItem); err != nil {
+			// Other cache, it needs conversion.
+			return nil, err
+		}
+	}
+	return
+}
+
+func (m *Model) saveSelectResultToCache(ctx context.Context, result Result, sql string, args ...interface{}) (err error) {
+	if !m.cacheEnabled || m.tx != nil {
+		return
+	}
+	var (
+		cacheKey = m.makeSelectCacheKey(sql, args...)
+		cacheObj = m.db.GetCache()
+	)
+	if m.cacheOption.Duration < 0 {
+		if _, errCache := cacheObj.Remove(ctx, cacheKey); errCache != nil {
+			intlog.Errorf(ctx, `%+v`, errCache)
+		}
+	} else {
+		// In case of Cache Penetration.
+		if result.IsEmpty() && m.cacheOption.Force {
+			result = Result{}
+		}
+		var cacheItem = &selectCacheItem{
+			Result: result,
+		}
+		if internalData := m.db.GetCore().getInternalCtxDataFromCtx(ctx); internalData != nil {
+			cacheItem.FirstResultColumn = internalData.FirstResultColumn
+		}
+		if errCache := cacheObj.Set(ctx, cacheKey, cacheItem, m.cacheOption.Duration); errCache != nil {
+			intlog.Errorf(ctx, `%+v`, errCache)
+		}
+	}
+	return nil
+}
+
+func (m *Model) makeSelectCacheKey(sql string, args ...interface{}) string {
+	var cacheKey = m.cacheOption.Name
+	if len(cacheKey) == 0 {
+		cacheKey = fmt.Sprintf(
+			`GCache@Schema(%s):%s`,
+			m.db.GetSchema(),
+			gmd5.MustEncryptString(sql+", @PARAMS:"+gconv.String(args)),
+		)
+	}
+	return cacheKey
+}
diff --git a/database/gdb/gdb_model_delete.go b/database/gdb/gdb_model_delete.go
index b6406e5df..bab1d740b 100644
--- a/database/gdb/gdb_model_delete.go
+++ b/database/gdb/gdb_model_delete.go
@@ -26,7 +26,7 @@ func (m *Model) Delete(where ...interface{}) (result sql.Result, err error) {
 	}
 	defer func() {
 		if err == nil {
-			m.checkAndRemoveCache(ctx)
+			m.checkAndRemoveSelectCache(ctx)
 		}
 	}()
 	var (
diff --git a/database/gdb/gdb_model_insert.go b/database/gdb/gdb_model_insert.go
index 12300d5cf..412e615b8 100644
--- a/database/gdb/gdb_model_insert.go
+++ b/database/gdb/gdb_model_insert.go
@@ -228,7 +228,7 @@ func (m *Model) Save(data ...interface{}) (result sql.Result, err error) {
 func (m *Model) doInsertWithOption(ctx context.Context, insertOption int) (result sql.Result, err error) {
 	defer func() {
 		if err == nil {
-			m.checkAndRemoveCache(ctx)
+			m.checkAndRemoveSelectCache(ctx)
 		}
 	}()
 	if m.data == nil {
diff --git a/database/gdb/gdb_model_select.go b/database/gdb/gdb_model_select.go
index b2b11b57f..ebe8432c9 100644
--- a/database/gdb/gdb_model_select.go
+++ b/database/gdb/gdb_model_select.go
@@ -13,11 +13,8 @@ import (
 
 	"github.com/gogf/gf/v2/container/gset"
 	"github.com/gogf/gf/v2/container/gvar"
-	"github.com/gogf/gf/v2/crypto/gmd5"
 	"github.com/gogf/gf/v2/errors/gcode"
 	"github.com/gogf/gf/v2/errors/gerror"
-	"github.com/gogf/gf/v2/internal/intlog"
-	"github.com/gogf/gf/v2/internal/json"
 	"github.com/gogf/gf/v2/internal/reflection"
 	"github.com/gogf/gf/v2/text/gstr"
 	"github.com/gogf/gf/v2/util/gconv"
@@ -521,33 +518,8 @@ func (m *Model) Having(having interface{}, args ...interface{}) *Model {
 
 // doGetAllBySql does the select statement on the database.
 func (m *Model) doGetAllBySql(ctx context.Context, queryType int, sql string, args ...interface{}) (result Result, err error) {
-	var (
-		ok       bool
-		cacheKey = ""
-		cacheObj = m.db.GetCache()
-	)
-	// Retrieve from cache.
-	if m.cacheEnabled && m.tx == nil {
-		cacheKey = m.cacheOption.Name
-		if len(cacheKey) == 0 {
-			cacheKey = fmt.Sprintf(
-				`GCache@Schema(%s):%s`,
-				m.db.GetSchema(),
-				gmd5.MustEncryptString(sql+", @PARAMS:"+gconv.String(args)),
-			)
-		}
-		if v, _ := cacheObj.Get(ctx, cacheKey); !v.IsNil() {
-			if result, ok = v.Val().(Result); ok {
-				// In-memory cache.
-				return result, nil
-			}
-			// Other cache, it needs conversion.
-			if err = json.UnmarshalUseNumber(v.Bytes(), &result); err != nil {
-				return nil, err
-			} else {
-				return result, nil
-			}
-		}
+	if result, err = m.getSelectResultFromCache(ctx, sql, args...); err != nil || result != nil {
+		return
 	}
 
 	in := &HookSelectInput{
@@ -562,25 +534,12 @@ func (m *Model) doGetAllBySql(ctx context.Context, queryType int, sql string, ar
 		Sql:   sql,
 		Args:  m.mergeArguments(args),
 	}
-	result, err = in.Next(ctx)
-
-	// Cache the result.
-	if cacheKey != "" && err == nil {
-		if m.cacheOption.Duration < 0 {
-			if _, errCache := cacheObj.Remove(ctx, cacheKey); errCache != nil {
-				intlog.Errorf(ctx, `%+v`, errCache)
-			}
-		} else {
-			// In case of Cache Penetration.
-			if result.IsEmpty() && m.cacheOption.Force {
-				result = Result{}
-			}
-			if errCache := cacheObj.Set(ctx, cacheKey, result, m.cacheOption.Duration); errCache != nil {
-				intlog.Errorf(ctx, `%+v`, errCache)
-			}
-		}
+	if result, err = in.Next(ctx); err != nil {
+		return
 	}
-	return result, err
+
+	err = m.saveSelectResultToCache(ctx, result, sql, args...)
+	return
 }
 
 func (m *Model) getFormattedSqlAndArgs(ctx context.Context, queryType int, limit1 bool) (sqlWithHolder string, holderArgs []interface{}) {
diff --git a/database/gdb/gdb_model_update.go b/database/gdb/gdb_model_update.go
index 817f6fa5f..db49ffbb7 100644
--- a/database/gdb/gdb_model_update.go
+++ b/database/gdb/gdb_model_update.go
@@ -37,7 +37,7 @@ func (m *Model) Update(dataAndWhere ...interface{}) (result sql.Result, err erro
 	}
 	defer func() {
 		if err == nil {
-			m.checkAndRemoveCache(ctx)
+			m.checkAndRemoveSelectCache(ctx)
 		}
 	}()
 	if m.data == nil {
diff --git a/protocol/goai/goai_operation.go b/protocol/goai/goai_operation.go
index 7c717e80f..db6e0b30d 100644
--- a/protocol/goai/goai_operation.go
+++ b/protocol/goai/goai_operation.go
@@ -26,7 +26,7 @@ type Operation struct {
 	Security     *SecurityRequirements `json:"security,omitempty"`
 	Servers      *Servers              `json:"servers,omitempty"`
 	ExternalDocs *ExternalDocs         `json:"externalDocs,omitempty"`
-	XExtensions  `json:"-"`
+	XExtensions  XExtensions           `json:"-"`
 }
 
 func (oai *OpenApiV3) tagMapToOperation(tagMap map[string]string, operation *Operation) error {
diff --git a/protocol/goai/goai_parameter.go b/protocol/goai/goai_parameter.go
index 09d1a08be..d20e92cdc 100644
--- a/protocol/goai/goai_parameter.go
+++ b/protocol/goai/goai_parameter.go
@@ -28,7 +28,7 @@ type Parameter struct {
 	Example         interface{} `json:"example,omitempty"`
 	Examples        *Examples   `json:"examples,omitempty"`
 	Content         *Content    `json:"content,omitempty"`
-	XExtensions     `json:"-"`
+	XExtensions     XExtensions `json:"-"`
 }
 
 func (oai *OpenApiV3) tagMapToParameter(tagMap map[string]string, parameter *Parameter) error {
diff --git a/protocol/goai/goai_path.go b/protocol/goai/goai_path.go
index 314a670b8..d5d8af66f 100644
--- a/protocol/goai/goai_path.go
+++ b/protocol/goai/goai_path.go
@@ -19,21 +19,21 @@ import (
 )
 
 type Path struct {
-	Ref         string     `json:"$ref,omitempty"`
-	Summary     string     `json:"summary,omitempty"`
-	Description string     `json:"description,omitempty"`
-	Connect     *Operation `json:"connect,omitempty"`
-	Delete      *Operation `json:"delete,omitempty"`
-	Get         *Operation `json:"get,omitempty"`
-	Head        *Operation `json:"head,omitempty"`
-	Options     *Operation `json:"options,omitempty"`
-	Patch       *Operation `json:"patch,omitempty"`
-	Post        *Operation `json:"post,omitempty"`
-	Put         *Operation `json:"put,omitempty"`
-	Trace       *Operation `json:"trace,omitempty"`
-	Servers     Servers    `json:"servers,omitempty"`
-	Parameters  Parameters `json:"parameters,omitempty"`
-	XExtensions `json:"-"`
+	Ref         string      `json:"$ref,omitempty"`
+	Summary     string      `json:"summary,omitempty"`
+	Description string      `json:"description,omitempty"`
+	Connect     *Operation  `json:"connect,omitempty"`
+	Delete      *Operation  `json:"delete,omitempty"`
+	Get         *Operation  `json:"get,omitempty"`
+	Head        *Operation  `json:"head,omitempty"`
+	Options     *Operation  `json:"options,omitempty"`
+	Patch       *Operation  `json:"patch,omitempty"`
+	Post        *Operation  `json:"post,omitempty"`
+	Put         *Operation  `json:"put,omitempty"`
+	Trace       *Operation  `json:"trace,omitempty"`
+	Servers     Servers     `json:"servers,omitempty"`
+	Parameters  Parameters  `json:"parameters,omitempty"`
+	XExtensions XExtensions `json:"-"`
 }
 
 // Paths are specified by OpenAPI/Swagger standard version 3.0.
diff --git a/protocol/goai/goai_response.go b/protocol/goai/goai_response.go
index cdf0c10a6..8961bb395 100644
--- a/protocol/goai/goai_response.go
+++ b/protocol/goai/goai_response.go
@@ -14,11 +14,11 @@ import (
 
 // Response is specified by OpenAPI/Swagger 3.0 standard.
 type Response struct {
-	Description string  `json:"description"`
-	Headers     Headers `json:"headers,omitempty"`
-	Content     Content `json:"content,omitempty"`
-	Links       Links   `json:"links,omitempty"`
-	XExtensions `json:"-"`
+	Description string      `json:"description"`
+	Headers     Headers     `json:"headers,omitempty"`
+	Content     Content     `json:"content,omitempty"`
+	Links       Links       `json:"links,omitempty"`
+	XExtensions XExtensions `json:"-"`
 }
 
 func (oai *OpenApiV3) tagMapToResponse(tagMap map[string]string, response *Response) error {
diff --git a/protocol/goai/goai_shema.go b/protocol/goai/goai_shema.go
index 398d2475d..c4516746e 100644
--- a/protocol/goai/goai_shema.go
+++ b/protocol/goai/goai_shema.go
@@ -59,7 +59,7 @@ type Schema struct {
 	MaxProps             *uint64        `json:"maxProperties,omitempty"`
 	AdditionalProperties *SchemaRef     `json:"additionalProperties,omitempty"`
 	Discriminator        *Discriminator `json:"discriminator,omitempty"`
-	XExtensions          `json:"-"`
+	XExtensions          XExtensions    `json:"-"`
 }
 
 func (s Schema) MarshalJSON() ([]byte, error) {
diff --git a/util/gconv/gconv_struct.go b/util/gconv/gconv_struct.go
index 0a3072bb0..b24d9d711 100644
--- a/util/gconv/gconv_struct.go
+++ b/util/gconv/gconv_struct.go
@@ -194,8 +194,7 @@ func doStruct(params interface{}, pointer interface{}, mapping map[string]string
 	var (
 		tempName       string
 		elemFieldType  reflect.StructField
-		elemTempValue  reflect.Value
-		elemOriginKind reflect.Kind
+		elemFieldValue reflect.Value
 		elemType       = pointerElemReflectValue.Type()
 		attrMap        = make(map[string]string) // Attribute name to its check name which has no symbols.
 	)
@@ -205,15 +204,17 @@ func doStruct(params interface{}, pointer interface{}, mapping map[string]string
 		if !utils.IsLetterUpper(elemFieldType.Name[0]) {
 			continue
 		}
-		elemTempValue = pointerElemReflectValue.Field(i)
-		elemOriginKind = elemTempValue.Kind()
-		for elemOriginKind == reflect.Ptr || elemOriginKind == reflect.Interface {
-			elemTempValue = elemTempValue.Elem()
-			elemOriginKind = elemTempValue.Kind()
-		}
 		// Maybe it's struct/*struct embedded.
-		if elemFieldType.Anonymous && elemOriginKind == reflect.Struct {
-			if err = doStruct(paramsMap, pointerElemReflectValue.Field(i), mapping, priorityTag); err != nil {
+		if elemFieldType.Anonymous {
+			elemFieldValue = pointerElemReflectValue.Field(i)
+			// Ignore the interface attribute if it's nil.
+			if elemFieldValue.Kind() == reflect.Interface {
+				elemFieldValue = elemFieldValue.Elem()
+				if !elemFieldValue.IsValid() {
+					continue
+				}
+			}
+			if err = doStruct(paramsMap, elemFieldValue, mapping, priorityTag); err != nil {
 				return err
 			}
 		} else {