server/services/poll.go

@@ -1,6 +1,9 @@
 package services
 
 import (
+	"database/sql"
+	"errors"
+
 	"go-sjles-pta-vote/server/db"
 	"go-sjles-pta-vote/server/models"
 )
@@ -13,6 +16,25 @@ func CreatePoll(poll *models.Poll) (*models.Poll, error) {
 		return nil, err
 	}
 	defer db.Close()
+
+	get_stmt, err := db_conn.Prepare(`
+		SELECT id 
+			FROM polls 
+			WHERE question == $1
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer get_stmt.Close()
+
+	var id int
+	err = get_stmt.QueryRow(poll.Question).Scan(&id)
+	if err != sql.ErrNoRows {
+		if err != nil {
+			return nil, err
+		}
+		return nil, errors.New("Already exists")
+	}
 	
 	stmt, err := db_conn.Prepare(`
 		INSERT INTO polls (

server/services/services_test.go

@@ -39,7 +39,7 @@ func TestCreatePoll(t *testing.T) {
 		t.Errorf(`Failed to insert into table: %v`, err)
 	}
 
-	if new_poll.ID != 1 {
-		t.Errorf(`Failed to insert into table: Index %d: error %v`, new_poll.ID, err)
+	if new_poll == nil {
+		t.Errorf(`Failed to insert into table`)
 	}
 }