diff --git a/filter_test.go b/filter_test.go
index 079f553..60b2bd5 100644
--- a/filter_test.go
+++ b/filter_test.go
@@ -53,7 +53,7 @@ func TestFilterScope(t *testing.T) {
 	schema := &schema.Schema{
 		DBNames: []string{"name"},
 		FieldsByDBName: map[string]*schema.Field{
-			"name": {Name: "Name", DBName: "name", DataType: schema.String},
+			"name": {Name: "Name", DBName: "name", GORMDataType: schema.String},
 		},
 		Table: "test_scope_models",
 	}
@@ -84,7 +84,7 @@ func TestFilterScopeBlacklisted(t *testing.T) {
 	schema := &schema.Schema{
 		DBNames: []string{"name"},
 		FieldsByDBName: map[string]*schema.Field{
-			"name": {Name: "Name"},
+			"name": {Name: "Name", GORMDataType: schema.String},
 		},
 	}
 
@@ -627,7 +627,7 @@ func TestFilterScopeWithUnsupportedDataType(t *testing.T) {
 	schema := &schema.Schema{
 		DBNames: []string{"name"},
 		FieldsByDBName: map[string]*schema.Field{
-			"name": {Name: "Name", DBName: "name", DataType: "CHARACTER VARYING(255)"},
+			"name": {Name: "Name", DBName: "name", GORMDataType: "custom", DataType: "CHARACTER VARYING(255)"},
 		},
 		Table: "test_scope_models",
 	}
diff --git a/search_test.go b/search_test.go
index 9b7b1b6..e40870c 100644
--- a/search_test.go
+++ b/search_test.go
@@ -25,9 +25,9 @@ func TestSearchScope(t *testing.T) {
 
 	schema := &schema.Schema{
 		FieldsByDBName: map[string]*schema.Field{
-			"name":  {Name: "Name", DBName: "name", DataType: schema.String},
-			"email": {Name: "Email", DBName: "email", DataType: schema.String},
-			"role":  {Name: "Role", DBName: "role", DataType: schema.String},
+			"name":  {Name: "Name", DBName: "name", GORMDataType: schema.String},
+			"email": {Name: "Email", DBName: "email", GORMDataType: schema.String},
+			"role":  {Name: "Role", DBName: "role", GORMDataType: schema.String},
 		},
 		Table: "test_models",
 	}
@@ -88,9 +88,9 @@ func TestSearchScopeEmptyField(t *testing.T) {
 	}
 	schema := &schema.Schema{
 		FieldsByDBName: map[string]*schema.Field{
-			"name":  {Name: "Name"},
-			"email": {Name: "Email"},
-			"role":  {Name: "Role"},
+			"name":  {Name: "Name", GORMDataType: schema.String},
+			"email": {Name: "Email", GORMDataType: schema.String},
+			"role":  {Name: "Role", GORMDataType: schema.String},
 		},
 		Table: "test_models",
 	}
@@ -454,9 +454,9 @@ func TestSearchScopeWithUnsupportedDataType(t *testing.T) {
 
 	schema := &schema.Schema{
 		FieldsByDBName: map[string]*schema.Field{
-			"name":  {Name: "Name", DBName: "name", DataType: schema.String},
-			"email": {Name: "Email", DBName: "email", DataType: "CHARACTER VARYING(255)"},
-			"role":  {Name: "Role", DBName: "role", DataType: schema.String},
+			"name":  {Name: "Name", DBName: "name", GORMDataType: schema.String},
+			"email": {Name: "Email", DBName: "email", GORMDataType: "custom", DataType: "CHARACTER VARYING(255)"},
+			"role":  {Name: "Role", DBName: "role", GORMDataType: schema.String},
 		},
 		Table: "test_models",
 	}
diff --git a/util.go b/util.go
index 74cbcbc..50496b8 100644
--- a/util.go
+++ b/util.go
@@ -127,7 +127,6 @@ func getDataType(field *schema.Field) DataType {
 			case 64:
 				return DataTypeFloat64
 			}
-			return DataTypeFloat64
 		case schema.Int:
 			switch field.Size {
 			case 8:
@@ -139,7 +138,6 @@ func getDataType(field *schema.Field) DataType {
 			case 64:
 				return DataTypeInt64
 			}
-			return DataTypeInt64
 		case schema.Uint:
 			switch field.Size {
 			case 8:
@@ -151,7 +149,6 @@ func getDataType(field *schema.Field) DataType {
 			case 64:
 				return DataTypeUint64
 			}
-			return DataTypeUint64
 		case schema.Time:
 			return DataTypeTime
 		}