Implement getCake endpoint and update memdb

store.go

@@ -4,7 +4,6 @@ package main
 import (
 	"database/sql"
 	_ "embed"
-	"fmt"
 	"os"
 	"strconv"
 	"time"
@@ -21,7 +20,7 @@ type store struct {
 func NewStore(filename string) (*store, error) {
 	var out store
 	var err error
-	if filename != ":memory:" {
+	if filename != ":memory:" && filename != "file:memdb1?mode=memory&cache=shared" {
 		os.Remove(filename)
 	}
 	// #todo: handle the error
@@ -42,6 +41,17 @@ func (s *store) close() {
 	s.db.Close()
 }
 
+func (s *store) getCake(id int) (cake, error) {
+	out := cake{ID: id}
+	row, err := s.db.Query("select name, price from cake where id = ?;", id)
+	if err != nil {
+		return out, err
+	}
+	row.Next()
+	err = row.Scan(&out.Name, &out.Price)
+	return out, err
+}
+
 func (s *store) getCakes() ([]cake, error) {
 	rows, err := s.db.Query("select id, name, price from cake")
 	if err != nil {
@@ -222,26 +232,3 @@ func (s *store) saveOrder(newOrder order) (int, error) {
 	return newOrder.ID, err
 
 }
-
-func listTables(db *sql.DB) error {
-	rows, err := db.Query("SELECT name FROM sqlite_master WHERE type='table';")
-	if err != nil {
-		return fmt.Errorf("error querying sqlite_master: %w", err)
-	}
-	defer rows.Close()
-
-	fmt.Println("Tables in the database:")
-	for rows.Next() {
-		var tableName string
-		if err := rows.Scan(&tableName); err != nil {
-			return fmt.Errorf("error scanning table name: %w", err)
-		}
-		fmt.Println("-", tableName)
-	}
-
-	if err := rows.Err(); err != nil {
-		return fmt.Errorf("error iterating through rows: %w", err)
-	}
-
-	return nil
-}

store_test.go

@@ -6,7 +6,7 @@ import (
 )
 
 func TestStore(t *testing.T) {
-	s, err := NewStore(":memory:")
+	s, err := NewStore("file:memdb1?mode=memory&cache=shared")
 	if err != nil {
 		t.Fatalf("Failed to create store: %v", err)
 	}
@@ -96,6 +96,19 @@ func TestStore(t *testing.T) {
 		t.Errorf("Want %v\nGot  %v", anotherCake, cakes)
 	}
 
+	selectedCake, err := s.getCake(newCake.ID)
+	if err != nil {
+		t.Error("error getting a cake", err)
+	}
+	if selectedCake.ID != newCake.ID || selectedCake.Name != newCake.Name || selectedCake.Price != newCake.Price {
+		t.Errorf("Want %v\nGot  %v", newCake, selectedCake)
+	}
+
+	selectedCake, err = s.getCake(-1)
+	if err == nil {
+		t.Error("no error getting a non-existant cake")
+	}
+
 	// create new order
 	now := time.Now()
 	newOrder := order{