我基本上有2个python脚本,一个用于前端,另一个用于后端。在前端我有这个:
def delete_command():
back.delete(selected_tuple[0])
所以基本上点击列表框中的条目然后在后端脚本上它有数据库调用(sqllite3)
def delete(id):
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
db_path = os.path.join(BASE_DIR, "AVDatabase.db")
conn=sqlite3.connect(db_path)
cur=conn.cursor()
cur.execute('DELETE * FROM "Books" where BookId=?',(BookId,))
conn.commit()
conn.close()
但我一直收到一个错误:
cur.execute('DELETE * FROM "Books" where BookId=?',(BookId,))
NameError: name 'BookId' is not defined
数据库已经存在,所以它没有动态创建,不确定为什么它认为BookID
列未定义,BookID
是主Books表上的主键整数。
你没有定义BookId
。
delete()
方法需要一个名为id
的参数,并且您没有在定义中的任何位置使用它。
用BookId
替换id
:cur.execute('DELETE * FROM "Books" where BookId=?',(BookId,))
到cur.execute('DELETE * FROM "Books" where BookId=?',(id,))
def delete(id):
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
db_path = os.path.join(BASE_DIR, "AVDatabase.db")
conn=sqlite3.connect(db_path)
cur=conn.cursor()
cur.execute('DELETE * FROM "Books" where BookId=?',(id,))
conn.commit()
conn.close()
这与数据库中的内容无关,甚至与SQL语句本身无关。你还没有定义BookId。此代码导致相同的错误:
class Cur:
def execute(self, statement, values):
pass
cur = Cur()
cur.execute('DELETE * FROM "Books" where BookId=?',(BookId,))
结果:
Traceback (most recent call last):
File "...", line 10, in <module>
cur.execute('DELETE * FROM "Books" where BookId=?',(BookId,))
NameError: name 'BookId' is not defined
正如@Powertieke所说,将BookId更改为id。