fix(validator): get the specified error message of a nested field

Change-Id: Ib99bf0c79015b30c8cb4467c775b43a5f81d416d

Author: andeya

validator/validator.go

@@ -61,12 +61,6 @@ func (v *Validator) Validate(value interface{}, checkAll ...bool) error {
 	if len(checkAll) > 0 {
 		all = checkAll[0]
 	}
-	type ErrInfo struct {
-		selector string
-		path     string
-		te       *tagexpr.TagExpr
-	}
-	var errInfos = make([]*ErrInfo, 0, 8)
 	var errs = make([]error, 0, 8)
 	v.vm.RunAny(value, func(te *tagexpr.TagExpr, err error) error {
 		if err != nil {
@@ -97,11 +91,10 @@ func (v *Validator) Validate(value interface{}, checkAll ...bool) error {
 					}
 				}
 			}
-			errInfos = append(errInfos, &ErrInfo{
-				selector: eh.StringSelector(),
-				path:     eh.Path(),
-				te:       te,
-			})
+			errs = append(errs, v.errFactory(
+				eh.Path(),
+				eh.TagExpr().EvalString(eh.StringSelector()+tagexpr.ExprNameSeparator+ErrMsgExprName),
+			))
 			if all {
 				return nil
 			}
@@ -112,12 +105,6 @@ func (v *Validator) Validate(value interface{}, checkAll ...bool) error {
 		}
 		return nil
 	})
-	for _, info := range errInfos {
-		errs = append(errs, v.errFactory(
-			info.path,
-			info.te.EvalString(info.selector+tagexpr.ExprNameSeparator+ErrMsgExprName),
-		))
-	}
 	switch len(errs) {
 	case 0:
 		return nil

validator/validator_test.go

@@ -104,7 +104,7 @@ func TestIssue3(t *testing.T) {
 
 func TestIssue4(t *testing.T) {
 	type C struct {
-		Index  *int32 `vd:"$!=nil"`
+		Index  *int32 `vd:"@:$!=nil;msg:'index is nil'"`
 		Index2 *int32 `vd:"$!=nil"`
 		Index3 *int32 `vd:"$!=nil"`
 	}
@@ -119,13 +119,13 @@ func TestIssue4(t *testing.T) {
 	assert.NoError(t, v.Validate(a))
 
 	a = &A{F1: new(C)}
-	assert.EqualError(t, v.Validate(a), "invalid parameter: F1.Index")
+	assert.EqualError(t, v.Validate(a), "index is nil")
 
-	a = &A{F2: map[string]*C{"": nil}}
-	assert.EqualError(t, v.Validate(a), "invalid parameter: F2{}.Index")
+	a = &A{F2: map[string]*C{"": &C{Index: new(int32)}}}
+	assert.EqualError(t, v.Validate(a), "invalid parameter: F2{}.Index2")
 
-	a = &A{F3: []*C{new(C)}}
-	assert.EqualError(t, v.Validate(a), "invalid parameter: F3[0].Index")
+	a = &A{F3: []*C{{Index: new(int32)}}}
+	assert.EqualError(t, v.Validate(a), "invalid parameter: F3[0].Index2")
 
 	type B struct {
 		F1 *C `vd:"$!=nil"`