Insert election with uuid instead of auto-generated id

internal/models/elections.go

@@ -2,12 +2,13 @@ package models
 
 import (
 	"database/sql"
+	"github.com/google/uuid"
 	"time"
 )
 
 type ElectionModelInterface interface {
-	Insert(name string, tokens int, areVotersKnown bool, maxVoters int, Choices []string, ExpiresAt time.Time) (int, error)
-	GetById(id int) (*Election, error)
+	Insert(name string, tokens int, areVotersKnown bool, maxVoters int, Choices []string, ExpiresAt time.Time) (string, error)
+	GetById(id string) (*Election, error)
 }
 
 type ElectionModel struct {
@@ -15,7 +16,7 @@ type ElectionModel struct {
 }
 
 type Election struct {
-	ID             int
+	ID             string
 	Name           string
 	Tokens         int
 	AreVotersKnown bool
@@ -25,48 +26,48 @@ type Election struct {
 	Choices        []string
 }
 
-func (e *ElectionModel) Insert(name string, tokens int, areVotersKnown bool, maxVoters int, choices []string, expiresAt time.Time) (int, error) {
+func (e *ElectionModel) Insert(name string, tokens int, areVotersKnown bool, maxVoters int, choices []string, expiresAt time.Time) (string, error) {
 	tx, err := e.DB.Begin()
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 	defer tx.Rollback()
 
-	result, err := tx.Exec(`
-		INSERT INTO elections (name, tokens, are_voters_known, max_voters, expires_at)
-        VALUES (?, ?, ?, ?, ?)`, name, tokens, areVotersKnown, maxVoters, expiresAt)
+	electionID, err := uuid.NewV7()
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 
-	electionID, err := result.LastInsertId()
+	_, err = tx.Exec(`
+		INSERT INTO elections (id, name, tokens, are_voters_known, max_voters, expires_at)
+        VALUES (?, ?, ?, ?, ?, ?)`, electionID, name, tokens, areVotersKnown, maxVoters, expiresAt)
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 
 	stmt, err := tx.Prepare(`
         INSERT INTO choices (text, election_id)
         VALUES (?, ?)`)
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 	defer stmt.Close()
 
 	for _, choice := range choices {
 		_, err = stmt.Exec(choice, electionID)
 		if err != nil {
-			return 0, err
+			return "", err
 		}
 	}
 
 	if err = tx.Commit(); err != nil {
-		return 0, err
+		return "0", err
 	}
 
-	return int(electionID), nil
+	return electionID.String(), nil
 }
 
-func (e *ElectionModel) GetById(id int) (*Election, error) {
+func (e *ElectionModel) GetById(id string) (*Election, error) {
 	query := `
 		SELECT id, name, tokens, are_voters_known, max_voters, created_at, expires_at
 		FROM elections