0.3(добавление функции добавки блюда)

dbtable.py

@@ -56,8 +56,10 @@ class DbTable:
         sql += ", ".join(self.column_names_without_id()) + ") VALUES("
         sql += ", ".join(vals) + ")"
         cur = self.dbconn.conn.cursor()
+        # cur.execute(sql)
         try:
             cur.execute(sql)
+            self.dbconn.conn.commit()
         except psycopg2.errors.UniqueViolation:
             self.dbconn.conn.rollback()
         return
@@ -86,3 +88,26 @@ class DbTable:
         cur.execute(sql)
         return cur.fetchall()        
         
+    def select_one(self, **kwargs):
+        conditions = []
+        values = []
+        
+        sorted_kwargs = sorted(kwargs.items(), key=lambda x: x[0])
+        
+        for key, value in sorted_kwargs():
+            conditions.append(f"{key}=%s")
+            values.append(value)
+
+        sql = f"SELECT * FROM {self.table_name()} WHERE " + " AND ".join(conditions)
+        cur = self.dbconn.conn.cursor()
+        cur.execute(sql, tuple(values))
+        result = cur.fetchone()
+        cur.close()
+
+        if result:
+            return True
+        else:
+            return False
+        
+
+