types.Int: Implement ID interface

Author: yhabteab

pkg/types/int.go

@@ -6,7 +6,9 @@ import (
 	"database/sql/driver"
 	"encoding"
 	"encoding/json"
+	"fmt"
 	"github.com/icinga/icingadb/internal"
+	"github.com/icinga/icingadb/pkg/contracts"
 	"strconv"
 )
 
@@ -58,11 +60,16 @@ func (i *Int) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+func (i Int) String() string {
+	return fmt.Sprintf("%d", i.Int64)
+}
+
 // Assert interface compliance.
 var (
 	_ json.Marshaler           = Int{}
 	_ json.Unmarshaler         = (*Int)(nil)
 	_ encoding.TextUnmarshaler = (*Int)(nil)
 	_ driver.Valuer            = Int{}
 	_ sql.Scanner              = (*Int)(nil)
+	_ contracts.ID             = (*Int)(nil)
 )