add fieldIsPrimaryAndBlank function to handle with both auto_increm…

…ent column and naturary key column

bulk_insert.go

@@ -103,7 +103,7 @@ func extractMapValue(value interface{}, excludeColumns []string) (map[string]int
 		_, hasForeignKey := field.TagSettingsGet("FOREIGNKEY")
 
 		if !containString(excludeColumns, field.Struct.Name) && field.StructField.Relationship == nil && !hasForeignKey &&
-			!field.IsIgnored && !fieldIsAutoIncrement(field) {
+			!field.IsIgnored && !fieldIsAutoIncrement(field) && !fieldIsPrimaryAndBlank(field) {
 			if (field.Struct.Name == "CreatedAt" || field.Struct.Name == "UpdatedAt") && field.IsBlank {
 				attrs[field.DBName] = time.Now()
 			} else if field.StructField.HasDefaultValue && field.IsBlank {
@@ -127,3 +127,7 @@ func fieldIsAutoIncrement(field *gorm.Field) bool {
 	}
 	return false
 }
+
+func fieldIsPrimaryAndBlank(field *gorm.Field) bool {
+	return field.IsPrimaryKey && field.IsBlank
+}

bulk_insert_test.go

@@ -104,3 +104,27 @@ func Test_fieldIsAutoIncrement(t *testing.T) {
 		}
 	}
 }
+
+func Test_fieldIsPrimaryAndBlank(t *testing.T) {
+	type notPrimaryTable struct {
+		Dummy int
+	}
+	type primaryKeyTable struct {
+		ID int `gorm:"column:id;primary_key"`
+	}
+
+	cases := []struct {
+		Value    interface{}
+		Expected bool
+	}{
+		{notPrimaryTable{Dummy: 0}, false},
+		{notPrimaryTable{Dummy: 1}, false},
+		{primaryKeyTable{ID: 0}, true},
+		{primaryKeyTable{ID: 1}, false},
+	}
+	for _, c := range cases {
+		for _, field := range (&gorm.Scope{Value: c.Value}).Fields() {
+			assert.Equal(t, fieldIsPrimaryAndBlank(field), c.Expected)
+		}
+	}
+}