change IIdentifiable interface to use a string instead of int

internal/data/DefaultRepository.go

@@ -3,7 +3,6 @@ package data
 import (
 	"encoding/json"
 	"errors"
-	"strconv"
 	"strings"
 )
 
@@ -27,7 +26,7 @@ func NewDefaultRepository[T IIdentifiable](ds IDatastore, prefix string) (*Defau
 // error if there already exists an entry with the same id, the json encoding
 // fails or the connection to the IDatastore fails.
 func (repo *DefaultRepository[T]) Create(t T) error {
-    key := repo.prefix + ":" + strconv.FormatUint(uint64(t.Id()), 10)
+    key := repo.prefix + ":" + t.Id()
     exists, err := repo.ds.KeyExists(key)
     if err != nil { return err }
     if exists { return errors.New("entry with given id already exists") }
@@ -45,7 +44,7 @@ func (repo *DefaultRepository[T]) Create(t T) error {
 // t. Trows an error if the json encoding fails or the connection to the
 // IDatastore fails.
 func (repo *DefaultRepository[T]) Update(t T) error {
-    key := repo.prefix + ":" + strconv.FormatUint(uint64(t.Id()), 10)
+    key := repo.prefix + ":" + t.Id()
     exists, err := repo.ds.KeyExists(key)
     if err != nil { return err }
     if !exists { return errors.New("no entry with given id") }
@@ -62,7 +61,7 @@ func (repo *DefaultRepository[T]) Update(t T) error {
 // Delete the entry with the same id as t in the repository. Trows an error if
 // the connection to the IDatastore fails or the key of t does not exist.
 func (repo *DefaultRepository[T]) Delete(t T) error {
-    key := repo.prefix + ":" + strconv.FormatUint(uint64(t.Id()), 10)
+    key := repo.prefix + ":" + t.Id()
 
     exists, err := repo.ds.KeyExists(key)
     if err != nil { return err }
@@ -86,12 +85,8 @@ func (repo *DefaultRepository[T]) GetAll() ([]T, error) {
         splitkey := strings.Split(key, ":")
         if splitkey[0] == repo.prefix {
 
-            // convert id to an int
-            id, err := strconv.ParseUint(splitkey[1], 10, 0)
-            if err != nil { return nil, err }
-
             // retrieve the object
-            obj, err := repo.GetById(uint(id))
+            obj, err := repo.GetById(splitkey[1])
             if err != nil { return nil, err }
             out = append(out, obj)
 
@@ -103,10 +98,10 @@ func (repo *DefaultRepository[T]) GetAll() ([]T, error) {
 
 // Get the objects of type T from the repository that has the given id. Trows an error
 // if the connection to the IDatastore or the decoding process fails.
-func (repo *DefaultRepository[T]) GetById(id uint) (T, error) {
+func (repo *DefaultRepository[T]) GetById(id string) (T, error) {
     var obj T
 
-    key := repo.prefix + ":" + strconv.FormatUint(uint64(id), 10)
+    key := repo.prefix + ":" + id
     value, err := repo.ds.Get(key)
     if err != nil { return obj, err }