Question

我编写了一个Web应用程序，它接受输入并将其存储在MySQL数据库中。我在Web应用程序上创建了一个搜索字段，以便可以输入一个字符串，它将搜索所有列以获取数据输入并将其返回。

最初我的搜索pymysql脚本看起来像这样。

  try:
    with connection.cursor(pymysql.cursors.DictCursor) as cursor:
        sql = """SELECT * FROM main WHERE Concat(idDirectConnect_ID,
                                         CR_Number,
                                         VPC_Name,
                                         Creator_Name,
                                         Route_Domain,
                                         OSPF_ASN,
                                         OSPF_VLAN,
                                         OSPF_Subnet,
                                         BGP_VLAN,
                                         BGP_Subnet,
                                         BGP_AuthKey is null,
                                         AWS_Expected_Subnet,
                                         AWS_Acnt,
                                         Company_Name,
                                         Lpbck_Int,
                                         Lpbck_IPAddr,
                                         Tunnel_Num1,
                                         Tunnel_Num2,
                                         VPN_Tunnel1_Dest is null,
                                         VPN_Int1_CryptoKey is null,
                                         VPN_Tun1_IP is null,
                                         VPN_Tunnel2_Dest is null,
                                         VPN_Int2_CryptoKey is null,
                                         VPN_Tun2_IP is null,
                                         AWS_VPN_ConnectionID is null)
                                         LIKE %s;"""
        cursor.execute(sql, ('%{}%'.format(sql_var)))
    result = cursor.fetchall()
    return result
finally:
    connection.close()

除非标记的列中的数据为null，否则此方法有效。这些列在第一次创建时为空，并且我保持一段时间，但是其他列中有可搜索的数据。

因此，我正在尝试将搜索查询更新为：

    try:
    with connection.cursor() as cursor:
        sql = """SELECT * FROM main WHERE (idDirectConnect_ID LIKE %s
                                         OR CR_Number LIKE %s
                                         OR VPC_Name LIKE %s
                                         OR Creator_Name LIKE %s
                                         OR Route_Domain LIKE %s
                                         OR OSPF_ASN LIKE %s
                                         OR OSPF_VLAN LIKE %s
                                         OR OSPF_Subnet LIKE %s
                                         OR BGP_VLAN LIKE %s
                                         OR BGP_Subnet LIKE %s
                                         OR AWS_Expected_Subnet LIKE %s
                                         OR AWS_Acnt LIKE %s
                                         OR Company_Name LIKE %s
                                         OR Lpbck_Int LIKE %s
                                         OR Lpbck_IPAddr LIKE %s
                                         OR Tunnel_Num1 LIKE %s
                                         OR Tunnel_Num2 LIKE %s
                                         OR BGP_AuthKey LIKE %s
                                         OR VPN_Tunnel1_Dest LIKE %s
                                         OR VPN_Int1_CryptoKey LIKE %s
                                         OR VPN_Tun1_IP LIKE %s
                                         OR VPN_Tunnel2_Dest LIKE %s
                                         OR VPN_Int2_CryptoKey LIKE %s
                                         OR VPN_Tun2_IP LIKE %s
                                         OR AWS_VPN_ConnectionID LIKE %s);"""
        cursor.execute(sql, ", ".join(["'%{}%'".format(sql_var)]*25))
    result = cursor.fetchall()
    return result
finally:
    connection.close()

但我得到了：

query = query % self._escape_args(args, conn)
TypeError: not enough arguments for format string

我最初只有：

 cursor.execute(sql, ('%{}%'.format(sql_var)))

但是我意识到所有％s都没有足够的参数，所以我将cursor.execute改为：

 cursor.execute(sql, ", ".join(["'%{}%'".format(sql_var)]*25))

现在回归：

"'%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%', '%206%'"

我已经对他们进行了统计并对其进行了叙述，并且我已经计算并叙述了％s并且应该已经足够了。

我已经阅读了尽可能多的类似SO帖子和MySQL文档。此时我怀疑我可能需要将光标更改为executemany，但这只是猜测。

Answer 1

比尔，

谢谢，这使我指出了正确的方向。

这是我的工作代码：

try:
    with connection.cursor(pymysql.cursors.DictCursor) as cursor:
        sql = """SELECT * FROM main WHERE (idDirectConnect_ID LIKE %s
                                         OR CR_Number LIKE %s
                                         OR VPC_Name LIKE %s
                                         OR Creator_Name LIKE %s
                                         OR Route_Domain LIKE %s
                                         OR OSPF_ASN LIKE %s
                                         OR OSPF_VLAN LIKE %s
                                         OR OSPF_Subnet LIKE %s
                                         OR BGP_VLAN LIKE %s
                                         OR BGP_Subnet LIKE %s
                                         OR AWS_Expected_Subnet LIKE %s
                                         OR AWS_Acnt LIKE %s
                                         OR Company_Name LIKE %s
                                         OR Lpbck_Int LIKE %s
                                         OR Lpbck_IPAddr LIKE %s
                                         OR Tunnel_Num1 LIKE %s
                                         OR Tunnel_Num2 LIKE %s
                                         OR BGP_AuthKey LIKE %s
                                         OR VPN_Tunnel1_Dest LIKE %s
                                         OR VPN_Int1_CryptoKey LIKE %s
                                         OR VPN_Tun1_IP LIKE %s
                                         OR VPN_Tunnel2_Dest LIKE %s
                                         OR VPN_Int2_CryptoKey LIKE %s
                                         OR VPN_Tun2_IP LIKE %s
                                         OR AWS_VPN_ConnectionID LIKE %s);"""
        cursor.execute(sql, list(['%{}%'.format(sql_var)]*25))
    result = cursor.fetchall()
    return result
finally:
    connection.close()

我还必须将光标更改回DictCursor，因为其余的python代码需要格式化。

TypeError：格式字符串Python3-MySQL

1 个答案: