Added NotDeleted helper method on SelectBuilder

select.go

@@ -282,7 +282,8 @@ func (b SelectBuilder) RemoveColumns() SelectBuilder {
 // Column adds a result column to the query.
 // Unlike Columns, Column accepts args which will be bound to placeholders in
 // the columns string, for example:
-//   Column("IF(col IN ("+squirrel.Placeholders(3)+"), 1, 0) as col", 1, 2, 3)
+//
+// Column("IF(col IN ("+squirrel.Placeholders(3)+"), 1, 0) as col", 1, 2, 3)
 func (b SelectBuilder) Column(column interface{}, args ...interface{}) SelectBuilder {
 	return builder.Append(b, "Columns", newPart(column, args...)).(SelectBuilder)
 }
@@ -362,6 +363,10 @@ func (b SelectBuilder) Where(pred interface{}, args ...interface{}) SelectBuilde
 	return builder.Append(b, "WhereParts", newWherePart(pred, args...)).(SelectBuilder)
 }
 
+func (b SelectBuilder) NotDeleted() SelectBuilder {
+	return b.Where("deleted_at IS NULL")
+}
+
 // GroupBy adds GROUP BY expressions to the query.
 func (b SelectBuilder) GroupBy(groupBys ...string) SelectBuilder {
 	return builder.Extend(b, "GroupBys", groupBys).(SelectBuilder)

select_test.go

@@ -68,6 +68,15 @@ func TestAsOfSystemTime(t *testing.T) {
 	assert.Equal(t, expectedArgs, args)
 }
 
+func TestNotDeleted(t *testing.T) {
+	b := Select("test").Where(Eq{"f4": true}).NotDeleted()
+	query, args, _ := b.ToSql()
+	expectedSql := `SELECT test WHERE f4 = ? AND deleted_at IS NULL`
+	expectedArgs := []interface{}{true}
+	assert.Equal(t, expectedSql, query)
+	assert.Equal(t, expectedArgs, args)
+}
+
 func TestSelectBuilderFromSelect(t *testing.T) {
 	subQ := Select("c").From("d").Where(Eq{"i": 0})
 	b := Select("a", "b").FromSelect(subQ, "subq")