我试图将虚拟数据插入到mysql数据库中。
数据库结构如下:
database name: messaround
database table name: test
表格结构:
id (Primary key, auto increment)
path (varchar(254))
更新2 方法和错误。 我有一种尝试插入via的方法:
def insert_into_db(dbcursor, table, *cols, **vals):
try:
query = "INSERT INTO {} ({}) VALUES ('{}')".format(table, ",".join(cols), "'),('".join(vals))
print(query)
dbcursor.execute(query)
dbcursor.commit()
print("inserted!")
except pymysql.Error as exc:
print("error inserting...\n {}".format(exc))
connection=conn_db()
insertstmt=insert_into_db(connection, table='test', cols=['path'], vals=['test.com/test2'])
然而,这是失败的说法:
INSERT INTO test () VALUES ('vals'),('cols')
error inserting...
(1136, "Column count doesn't match value count at row 1")
你能帮忙吗?
谢谢。
答案 0 :(得分:2)
如果您使用代码:
def insert_into_db(dbcursor, table, *cols, **vals):
query = "INSERT INTO {} ({}) VALUES ({})".format(table,",".join(cols), ",".join(vals))
print(query)
insert_into_db('cursor_here', 'table_here', 'name', 'city', name_person='diego', city_person='Sao Paulo')
Python返回:
INSERT INTO table_here (name,city) VALUES (name_person,city_person)
现在有了这个:
def new_insert_into_db(dbcursor, table, *cols, **vals):
vals2 = ''
for first_part, second_part in vals.items():
vals2 += '\'' + second_part + '\','
vals2 = vals2[:-1]
query = "INSERT INTO {} ({}) VALUES ({})".format(table,",".join(cols), vals2)
print(query)
new_insert_into_db('cursor_here', 'table_here', 'name', 'city', name_person='diego', city_person='Sao Paulo')
Python将返回正确的SQL:
INSERT INTO table_here (name,city) VALUES ('diego','Sao Paulo')
答案 1 :(得分:0)
通常在Python中,您将参数化查询传递给数据库驱动程序。见this example in PyMySQL's documentation;它使用占位符字符构造<?php
/*
* This file is part of jwt-auth.
*
* (c) Sean Tymon <tymon148@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
return [
/*
|--------------------------------------------------------------------------
| JWT Authentication Secret
|--------------------------------------------------------------------------
|
| Don't forget to set this in your .env file, as it will be used to sign
| your tokens. A helper command is provided for this:
| `php artisan jwt:secret`
|
| Note: This will be used for Symmetric algorithms only (HMAC),
| since RSA and ECDSA use a private/public key combo (See below).
|
*/
// 'secret' => 'my-dummy-jwt-token',
'secret' => 'key',
/*
|--------------------------------------------------------------------------
| JWT Authentication Keys
|--------------------------------------------------------------------------
|
| The algorithm you are using, will determine whether your tokens are
| signed with a random string (defined in `JWT_SECRET`) or using the
| following public & private keys.
|
| Symmetric Algorithms:
| HS256, HS384 & HS512 will use `JWT_SECRET`.
|
| Asymmetric Algorithms:
| RS256, RS384 & RS512 / ES256, ES384 & ES512 will use the keys below.
|
*/
'keys' => [
/*
|--------------------------------------------------------------------------
| Public Key
|--------------------------------------------------------------------------
|
| A path or resource to your public key.
|
| E.g. 'file://path/to/public/key'
|
*/
'public' => env('JWT_PUBLIC_KEY'),
/*
|--------------------------------------------------------------------------
| Private Key
|--------------------------------------------------------------------------
|
| A path or resource to your private key.
|
| E.g. 'file://path/to/private/key'
|
*/
'private' => env('JWT_PRIVATE_KEY'),
/*
|--------------------------------------------------------------------------
| Passphrase
|--------------------------------------------------------------------------
|
| The passphrase for your private key. Can be null if none set.
|
*/
'passphrase' => env('JWT_PASSPHRASE'),
],
/*
|--------------------------------------------------------------------------
| JWT time to live
|--------------------------------------------------------------------------
|
| Specify the length of time (in minutes) that the token will be valid for.
| Defaults to 1 hour.
|
| You can also set this to null, to yield a never expiring token.
| Some people may want this behaviour for e.g. a mobile app.
| This is not particularly recommended, so make sure you have appropriate
| systems in place to revoke the token if necessary.
|
*/
//'ttl' => env('JWT_TTL', 60),
'ttl' => null,
/*
|--------------------------------------------------------------------------
| Refresh time to live
|--------------------------------------------------------------------------
|
| Specify the length of time (in minutes) that the token can be refreshed
| within. I.E. The user can refresh their token within a 2 week window of
| the original token being created until they must re-authenticate.
| Defaults to 2 weeks.
|
| You can also set this to null, to yield an infinite refresh time.
| Some may want this instead of never expiring tokens for e.g. a mobile app.
| This is not particularly recommended, so make sure you have appropriate
| systems in place to revoke the token if necessary.
|
*/
'refresh_ttl' => env('JWT_REFRESH_TTL', 20160),
/*
|--------------------------------------------------------------------------
| JWT hashing algorithm
|--------------------------------------------------------------------------
|
| Specify the hashing algorithm that will be used to sign the token.
|
| See here: https://github.com/namshi/jose/tree/master/src/Namshi/JOSE/Signer/OpenSSL
| for possible values.
|
*/
'algo' => env('JWT_ALGO', 'HS256'),
/*
|--------------------------------------------------------------------------
| Required Claims
|--------------------------------------------------------------------------
|
| Specify the required claims that must exist in any token.
| A TokenInvalidException will be thrown if any of these claims are not
| present in the payload.
|
*/
'required_claims' => [
'iss',
'iat',
'nbf',
'sub',
'jti',
],
//'exp', remove token expire time
/*
|--------------------------------------------------------------------------
| Persistent Claims
|--------------------------------------------------------------------------
|
| Specify the claim keys to be persisted when refreshing a token.
| `sub` and `iat` will automatically be persisted, in
| addition to the these claims.
|
| Note: If a claim does not exist then it will be ignored.
|
*/
'persistent_claims' => [
// 'foo',
// 'bar',
],
/*
|--------------------------------------------------------------------------
| Blacklist Enabled
|--------------------------------------------------------------------------
|
| In order to invalidate tokens, you must have the blacklist enabled.
| If you do not want or need this functionality, then set this to false.
|
*/
'blacklist_enabled' => env('JWT_BLACKLIST_ENABLED', true),
/*
| -------------------------------------------------------------------------
| Blacklist Grace Period
| -------------------------------------------------------------------------
|
| When multiple concurrent requests are made with the same JWT,
| it is possible that some of them fail, due to token regeneration
| on every request.
|
| Set grace period in seconds to prevent parallel request failure.
|
*/
'blacklist_grace_period' => env('JWT_BLACKLIST_GRACE_PERIOD', 0),
/*
|--------------------------------------------------------------------------
| Providers
|--------------------------------------------------------------------------
|
| Specify the various providers used throughout the package.
|
*/
'providers' => [
/*
|--------------------------------------------------------------------------
| JWT Provider
|--------------------------------------------------------------------------
|
| Specify the provider that is used to create and decode the tokens.
|
*/
'jwt' => Tymon\JWTAuth\Providers\JWT\Namshi::class,
/*
|--------------------------------------------------------------------------
| Authentication Provider
|--------------------------------------------------------------------------
|
| Specify the provider that is used to authenticate users.
|
*/
'auth' => Tymon\JWTAuth\Providers\Auth\Illuminate::class,
/*
|--------------------------------------------------------------------------
| Storage Provider
|--------------------------------------------------------------------------
|
| Specify the provider that is used to store tokens in the blacklist.
|
*/
'storage' => Tymon\JWTAuth\Providers\Storage\Illuminate::class,
],
];
查询,然后调用传递查询的INSERT
和实际值的元组。
使用参数化查询也是recommended for security purposes,因为它会破坏许多常见的SQL注入攻击。
答案 2 :(得分:0)
你应该打印你生成的sql语句,这样可以更容易地看出错误。
但我猜您需要为'
的字符串值引用",".join(vals)
(如果有字符串值。)
所以你的代码正在生成
insert into test (path,) values (test.com/test2,);
但它应该产生
insert into test (`path`) values ('test.com/test2');
否则尝试https://github.com/markuman/MariaSQL/,这样可以非常轻松地使用pymysql将数据插入MariaDB / MySQL。
答案 3 :(得分:0)
更改您的查询,如下所示
query = "INSERT INTO {} ({}) VALUES ('{}')".format(table, ",".join(cols), "'),('".join(vals))
当您使用join时,该变量应该是一个列表而不是一个字符串
table = 'test'
cols = ['path']
vals = ['test.com/test2', 'another.com/anothertest']
print(query)
"INSERT INTO test (path) VALUES ('test.com/test2'),('another.com/anothertest')"
更新
def insert_into_db(dbconnection=None, table='', cols=None, vals=None):
mycursor = dbconnection.cursor()
if not (dbconnection and table and cols and vals):
print('Must need all values')
quit()
try:
query = "INSERT INTO {} ({}) VALUES ('{}')".format(table, ",".join(cols), "'),('".join(vals))
mycursor.execute(query)
dbconnection.commit()
print("inserted!")
except pymysql.Error as exc:
print("error inserting...\n {}".format(exc))
connection=conn_db()
insertstmt=insert_into_db(dbconnection=connection, table='test', cols=['path'], vals=['test.com/test2'])