ArrayContains.ToSQL -> ToSql to implement proper interface

database/array_contains.go

@@ -11,7 +11,7 @@
 
 type ArrayContains map[string]interface{}
 
-func (ac ArrayContains) ToSQL() (sql string, args []interface{}, err error) {
+func (ac ArrayContains) ToSql() (sql string, args []interface{}, err error) {
 	if len(ac) == 0 {
 		// Empty Sql{} evaluates to true.
 		sql = "(1=1)"

database/sql_helper.go

@@ -105,7 +105,7 @@
 	return nil
 }
 
-// Upsert upserts a Mapped into the db
+// UpsertColumns upserts a Mapped into the db using only the given columns as update source
 func (h *SQLHelper) UpsertColumns(insertColumns, updateColumns []string, instances ...Mapped) error {
 	for _, instance := range instances {
 		query := SQLUpsertColumns(instance, insertColumns, updateColumns)