插入多個對象的SQLAlchemy錯誤

Question

這可能是簡單的我錯過了，但我不知道它是什麼。

這裏是我的代碼：

from sqlalchemy import (Column, String, create_engine) 
from sqlalchemy.schema import FetchedValue 
from sqlalchemy.ext.declarative import declarative_base 
from sqlalchemy.orm import (scoped_session, sessionmaker) 


DBSession = scoped_session(sessionmaker()) 
Base = declarative_base() 

class Timezone(Base): 
    __tablename__ = 'timezone' 
    tz_name = Column(String(100), primary_key=True) 
    description = Column(String(100), nullable=False) 


if __name__ == '__main__': 
    engine = create_engine('mysql+mysqlconnector://root@127.0.0.1/mainserver?charset=utf8&use_unicode=0', echo=True) 
    DBSession.configure(bind=engine) 
    Base.metadata.drop_all(engine) 
    Base.metadata.create_all(engine) 
    session = DBSession() 
    session.add_all([ 
     Timezone(tz_name = "Canada/Atlantic", description = "Atlantic (UTC-4)"), 
     Timezone(tz_name = "Canada/Central", description = "Central (UTC-6)"), 
     Timezone(tz_name = "Canada/Eastern", description = "Eastern (UTC-5)"), 
     Timezone(tz_name = "Canada/Mountain", description = "Mountain (UTC-7)"), 
     Timezone(tz_name = "Canada/Newfoundland", description = "Newfoundland (UTC-3:30)"), 
     Timezone(tz_name = "Canada/Pacific", description = "Pacific (UTC-8)"), 
     Timezone(tz_name = "Canada/Saskatchewan", description = "Saskatchewan (UTC-6)"), 
     Timezone(tz_name = "Canada/Yukon", description = "Yukon (UTC-8)"), 
    ]) 
    session.flush() 
    session.commit() 

這裏與發生的錯誤輸出：

2012-11-02 18:52:32,343 INFO sqlalchemy.engine.base.Engine SELECT DATABASE() 
2012-11-02 18:52:32,343 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,346 INFO sqlalchemy.engine.base.Engine SHOW VARIABLES LIKE 'lower_case_table_names' 
2012-11-02 18:52:32,346 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,347 INFO sqlalchemy.engine.base.Engine SHOW COLLATION 
2012-11-02 18:52:32,348 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,364 INFO sqlalchemy.engine.base.Engine SHOW VARIABLES LIKE 'sql_mode' 
2012-11-02 18:52:32,364 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,365 INFO sqlalchemy.engine.base.Engine DESCRIBE `timezone` 
2012-11-02 18:52:32,366 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,366 INFO sqlalchemy.engine.base.Engine ROLLBACK 
2012-11-02 18:52:32,367 INFO sqlalchemy.engine.base.Engine DESCRIBE `timezone` 
2012-11-02 18:52:32,367 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,368 INFO sqlalchemy.engine.base.Engine ROLLBACK 
2012-11-02 18:52:32,369 INFO sqlalchemy.engine.base.Engine 
CREATE TABLE timezone (
    tz_name VARCHAR(100) NOT NULL, 
    description VARCHAR(100) NOT NULL, 
    PRIMARY KEY (tz_name) 
) 


2012-11-02 18:52:32,369 INFO sqlalchemy.engine.base.Engine {} 
2012-11-02 18:52:32,434 INFO sqlalchemy.engine.base.Engine COMMIT 
2012-11-02 18:52:32,436 INFO sqlalchemy.engine.base.Engine BEGIN (implicit) 
2012-11-02 18:52:32,437 INFO sqlalchemy.engine.base.Engine INSERT INTO timezone (tz_name, description) VALUES (%(tz_name)s, %(description)s) 
2012-11-02 18:52:32,437 INFO sqlalchemy.engine.base.Engine ({'tz_name': 'Canada/Atlantic', 'description': 'Atlantic (UTC-4)'}, {'tz_name': 'Canada/Central', 'description': 'Central (UTC-6)'}, {'tz_name': 'Canada/Eastern', 'description': 'Eastern (UTC-5)'}, {'tz_name': 'Canada/Mountain', 'description': 'Mountain (UTC-7)'}, {'tz_name': 'Canada/Newfoundland', 'description': 'Newfoundland (UTC-3:30)'}, {'tz_name': 'Canada/Pacific', 'description': 'Pacific (UTC-8)'}, {'tz_name': 'Canada/Saskatchewan', 'description': 'Saskatchewan (UTC-6)'}, {'tz_name': 'Canada/Yukon', 'description': 'Yukon (UTC-8)'}) 
2012-11-02 18:52:32,438 INFO sqlalchemy.engine.base.Engine ROLLBACK 
Traceback (most recent call last): 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/engine/base.py", line 1680, in _execute_context 
    context) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/engine/default.py", line 330, in do_executemany 
    cursor.executemany(statement, parameters) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/mysql/connector/cursor.py", line 493, in executemany 
    return self._batch_insert(operation,seq_params) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/mysql/connector/cursor.py", line 449, in _batch_insert 
    return self.execute(stmt) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/mysql/connector/cursor.py", line 418, in execute 
    self._handle_result(self._connection.cmd_query(stmt)) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/mysql/connector/connection.py", line 512, in cmd_query 
    result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query)) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/mysql/connector/connection.py", line 434, in _handle_result 
    raise errors.get_exception(packet) 
mysql.connector.errors.ProgrammingError: 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%(tz_name),(%(tz_name),(%(tz_name),(%(tz_name),(%(tz_name),(%(tz_name),(%(tz_nam' at line 1 

The above exception was the direct cause of the following exception: 

Traceback (most recent call last): 
    File "bug2.py", line 32, in <module> 
    session.flush() 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/orm/session.py", line 1718, in flush 
    self._flush(objects) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/orm/session.py", line 1789, in _flush 
    flush_context.execute() 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/orm/unitofwork.py", line 331, in execute 
    rec.execute(self) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/orm/unitofwork.py", line 475, in execute 
    uow 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/orm/persistence.py", line 64, in save_obj 
    table, insert) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/orm/persistence.py", line 530, in _emit_insert_statements 
    execute(statement, multiparams) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/engine/base.py", line 1449, in execute 
    params) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/engine/base.py", line 1584, in _execute_clauseelement 
    compiled_sql, distilled_params 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/engine/base.py", line 1698, in _execute_context 
    context) 
    File "/sites/metrics_dev/lib/python3.3/site-packages/sqlalchemy/engine/base.py", line 1843, in _handle_dbapi_exception 
    from e 
sqlalchemy.exc.ProgrammingError: (ProgrammingError) 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%(tz_name),(%(tz_name),(%(tz_name),(%(tz_name),(%(tz_name),(%(tz_name),(%(tz_nam' at line 1 'INSERT INTO timezone (tz_name, description) VALUES (%(tz_name)s, %(description)s)' ({'tz_name': 'Canada/Atlantic', 'description': 'Atlantic (UTC-4)'}, {'tz_name': 'Canada/Central', 'description': 'Central (UTC-6)'}, {'tz_name': 'Canada/Eastern', 'description': 'Eastern (UTC-5)'}, {'tz_name': 'Canada/Mountain', 'description': 'Mountain (UTC-7)'}, {'tz_name': 'Canada/Newfoundland', 'description': 'Newfoundland (UTC-3:30)'}, {'tz_name': 'Canada/Pacific', 'description': 'Pacific (UTC-8)'}, {'tz_name': 'Canada/Saskatchewan', 'description': 'Saskatchewan (UTC-6)'}, {'tz_name': 'Canada/Yukon', 'description': 'Yukon (UTC-8)'}) 

這似乎是在代碼中的東西沒有做正確的代碼替換。

Answer 1

我向SQLAlchemy開發者提交了一個bug，發現問題出在mysqlconnector上。這裏的錯誤報告：http://www.sqlalchemy.org/trac/ticket/2599

這裏的短版...改變

engine = create_engine('mysql+mysqlconnector://root@127.0.0.1/mainserver?charset=utf8&use_unicode=0', echo=True) 

到

engine = create_engine('mysql+mysqlconnector://root@127.0.0.1/mainserver?charset=utf8&use_unicode=0', paramstyle='format', echo=True) 

將圍繞這一問題正在與mysqlconnector解決這個問題。