diff --git a/migrator.go b/migrator.go
index e6f2160..44a3939 100644
--- a/migrator.go
+++ b/migrator.go
@@ -15,10 +15,10 @@ import (
 
 const indexSQL = `
 SELECT 
+	col.name AS column_name,
 	i.name AS index_name,
 	i.is_unique,
-	i.is_primary_key,
-	col.name AS column_name
+	i.is_primary_key
 FROM
 	sys.indexes i
 	LEFT JOIN sys.index_columns ic ON ic.object_id = i.object_id AND ic.index_id = i.index_id
@@ -499,11 +499,10 @@ func (m Migrator) RenameIndex(value interface{}, oldName, newName string) error
 }
 
 type Index struct {
-	TableName    string
-	ColumnName   string
-	IndexName    string
-	IsUnique     sql.NullBool
-	IsPrimaryKey sql.NullBool
+	ColumnName   string       `gorm:"column:column_name"`
+	IndexName    string       `gorm:"column:index_name"`
+	IsUnique     sql.NullBool `gorm:"column:is_unique"`
+	IsPrimaryKey sql.NullBool `gorm:"column:is_primary_key"`
 }
 
 func (m Migrator) GetIndexes(value interface{}) ([]gorm.Index, error) {
diff --git a/migrator_test.go b/migrator_test.go
index 056a58a..63a86e0 100644
--- a/migrator_test.go
+++ b/migrator_test.go
@@ -1,6 +1,7 @@
 package sqlserver_test
 
 import (
+	"encoding/json"
 	"os"
 	"reflect"
 	"testing"
@@ -209,26 +210,26 @@ func (*TestTableFieldCommentUpdate) TableName() string { return "test_table_fiel
 func TestMigrator_MigrateColumnComment(t *testing.T) {
 	db, err := gorm.Open(sqlserver.Open(sqlserverDSN))
 	if err != nil {
-		t.Error(err)
+		t.Fatal(err)
 	}
-	migrator := db.Debug().Migrator()
+	dm := db.Debug().Migrator()
 
 	tableModel := new(TestTableFieldComment)
 	defer func() {
-		if err = migrator.DropTable(tableModel); err != nil {
+		if err = dm.DropTable(tableModel); err != nil {
 			t.Errorf("couldn't drop table %q, got error: %v", tableModel.TableName(), err)
 		}
 	}()
 
-	if err = migrator.AutoMigrate(tableModel); err != nil {
+	if err = dm.AutoMigrate(tableModel); err != nil {
 		t.Fatal(err)
 	}
 	tableModelUpdate := new(TestTableFieldCommentUpdate)
-	if err = migrator.AutoMigrate(tableModelUpdate); err != nil {
+	if err = dm.AutoMigrate(tableModelUpdate); err != nil {
 		t.Error(err)
 	}
 
-	if m, ok := migrator.(sqlserver.Migrator); ok {
+	if m, ok := dm.(sqlserver.Migrator); ok {
 		stmt := db.Model(tableModelUpdate).Find(nil).Statement
 		if stmt == nil || stmt.Schema == nil {
 			t.Fatal("expected Statement.Schema, got nil")
@@ -248,3 +249,56 @@ func TestMigrator_MigrateColumnComment(t *testing.T) {
 		t.Logf("got comments: %#v", gotComments)
 	}
 }
+
+func TestMigrator_GetIndexes(t *testing.T) {
+	db, err := gorm.Open(sqlserver.Open(sqlserverDSN))
+	if err != nil {
+		t.Fatal(err)
+	}
+	dm := db.Debug().Migrator()
+
+	type testTableIndex struct {
+		Test uint64 `gorm:"index"`
+	}
+	type testTableUnique struct {
+		ID string `gorm:"index:unique_id,class:UNIQUE,where:id IS NOT NULL"`
+	}
+	type testTablePrimaryKey struct {
+		ID string `gorm:"primaryKey"`
+	}
+
+	type args struct {
+		value interface{}
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{name: "index", args: args{value: new(testTableIndex)}},
+		{name: "unique", args: args{value: new(testTableUnique)}},
+		{name: "primaryKey", args: args{value: new(testTablePrimaryKey)}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err = dm.AutoMigrate(tt.args.value); err != nil {
+				t.Error(err)
+			}
+			got, gotErr := dm.GetIndexes(tt.args.value)
+			if (gotErr != nil) != tt.wantErr {
+				t.Errorf("GetIndexes() error = %v, wantErr %v", gotErr, tt.wantErr)
+				return
+			}
+			for _, index := range got {
+				_, validUnique := index.Unique()
+				_, validPK := index.PrimaryKey()
+				indexBytes, _ := json.Marshal(index)
+				if index.Name() == "" && !validUnique && !validPK {
+					t.Errorf("GetIndexes() got = %s empty", indexBytes)
+				} else {
+					t.Logf("GetIndexes() got = %s", indexBytes)
+				}
+			}
+		})
+	}
+}