I had the same problem, I'm not sure about your code, but for me, the
source of the problem was that I tried to merge two different objects that
had the same primary key, so the merge supposedly worked, but when I
commited, I got the same error you did.
Tp solve it I just kept the items I wanted to merge in a dict (with the
primary keys as the dict keys), and just after I finished preparing all the
objects, I merged and then commited them all.
Hope that helps (if it's even still relevant),
but it might help someone else with the same problem.
On Wednesday, 5 April 2017 20:01:09 UTC+3, jean-yves...@coorpacademy.com
wrote:
>
> I use sqlalchemy to perform to insert and upsert of rows. During certain
> requests for many tables I get an IntegrityError duplicate entry when using
> session.merge(obj).
> I tried to find an answer on the web and on the IRC but I came back
> empty-handed. I'm using python 2.7, alembic 0.9.1 and PyMysql 0.7.9. I'm
> using a mysql dialect to communicate to a mysql RDS database from AWS.
> The stack trace is:
> ```
>
> (pymysql.err.IntegrityError) (1062, u"Duplicate entry
> 'q/FtMv4syu5QXenCXvx6ZGhbLSFYSbo6Kgv8sjuZDZwW4j1Zh3ZFHtey/aqVOe5j' for key
> 'PRIMARY'")
>
>
>
> Traceback (most recent call last):
> File "/var/task/streaming_lambda.py", line 71, in lambda_handler
> session.commit()
> File "/var/task/sqlalchemy/orm/session.py", line 874, in commit
> self.transaction.commit()
> File "/var/task/sqlalchemy/orm/session.py", line 461, in commit
> self._prepare_impl()
> File "/var/task/sqlalchemy/orm/session.py", line 441, in _prepare_impl
> self.session.flush()
> File "/var/task/sqlalchemy/orm/session.py", line 2137, in flush
> self._flush(objects)
> File "/var/task/sqlalchemy/orm/session.py", line 2257, in _flush
> transaction.rollback(_capture_exception=True)
> File "/var/task/sqlalchemy/util/langhelpers.py", line 60, in __exit__
> compat.reraise(exc_type, exc_value, exc_tb)
> File "/var/task/sqlalchemy/orm/session.py", line 2221, in _flush
> flush_context.execute()
> File "/var/task/sqlalchemy/orm/unitofwork.py", line 389, in execute
> rec.execute(self)
> File "/var/task/sqlalchemy/orm/unitofwork.py", line 548, in execute
> uow
> File "/var/task/sqlalchemy/orm/persistence.py", line 181, in save_obj
> mapper, table, insert)
> File "/var/task/sqlalchemy/orm/persistence.py", line 799, in
> _emit_insert_statements
> execute(statement, multiparams)
> File "/var/task/sqlalchemy/engine/base.py", line 945, in execute
> return meth(self, multiparams, params)
> File "/var/task/sqlalchemy/sql/elements.py", line 263, in
> _execute_on_connection
> return connection._execute_clauseelement(self, multiparams, params)
> File "/var/task/sqlalchemy/engine/base.py", line 1053, in
> _execute_clauseelement
> compiled_sql, distilled_params
> File "/var/task/sqlalchemy/engine/base.py", line 1189, in _execute_context
> context)
> File "/var/task/sqlalchemy/engine/base.py", line 1393, in
> _handle_dbapi_exception
> exc_info
> File "/var/task/sqlalchemy/util/compat.py", line 202, in raise_from_cause
> reraise(type(exception), exception, tb=exc_tb, cause=cause)
> File "/var/task/sqlalchemy/engine/base.py", line 1182, in _execute_context
> context)
> File "/var/task/sqlalchemy/engine/default.py", line 469, in do_execute
> cursor.execute(statement, parameters)
> File "/var/task/pymysql/cursors.py", line 166, in execute
> result = self._query(query)
> File "/var/task/pymysql/cursors.py", line 322, in _query
> conn.query(q)
> File "/var/task/pymysql/connections.py", line 835, in query
> self._affected_rows = self._read_query_result(unbuffered=unbuffered)
> File "/var/task/pymysql/connections.py", line 1019, in _read_query_result
> result.read()
> File "/var/task/pymysql/connections.py", line 1302, in read
> first_packet = self.connection._read_packet()
> File "/var/task/pymysql/connections.py", line 981, in _read_packet
> packet.check_error()
> File "/var/task/pymysql/connections.py", line 393, in check_error
> err.raise_mysql_exception(self._data)
> File "/var/task/pymysql/err.py", line 107, in raise_mysql_exception
> raise errorclass(errno, errval)
> IntegrityError: (pymysql.err.IntegrityError) (1062, u"Duplicate entry
> 'q/FtMv4syu5QXenCXvx6ZGhbLSFYSbo6Kgv8sjuZDZwW4j1Zh3ZFHtey/aqVOe5j' for key
> 'PRIMARY'") [SQL: u'INSERT INTO user_table (_id, collection_name, platform,
> created_at, updated_at, deleted, account_complete, population_current, state,
> stars, language, age_range, private_account, user_credit, new_user,
> anonymous) VALUES (%(_id)s, %(collection_name)s, %(platform)s,
> %(created_at)s, %(updated_at)s, %(deleted)s, %(account_complete)s,
> %(population_current)s, %(state)s, %(stars)s, %(language)s, %(age_range)s,
> %(private_account)s, %(user_credit)s, %(new_user)s, %(anonymous)s)']
> [parameters: {'user_credit': 0, 'age_range': None, 'anonymous': 0,
> 'language': None, 'new_user': 1, 'collection_name': None, 'created_at':
> datetime.datetime(2000, 1, 1, 0, 0), 'deleted': 0, 'account_complete': None,
> 'updated_at': None, 'platform': 'undefined', 'state': None, 'stars': None,
> '_id':
> 'q/FtMv4syu5QXenCXvx6ZGhbLSFYSbo6Kgv8sjuZDZwW4j1Zh3ZFHtey/aqVOe5jmS3lKMKns0LkrC+uZEifDHg32wqWG6Efm+h4ofptf1kZSKIp54yj243Av+lQFSrQOJd5SeOcn178SodEAmfEEpRhzy3S9NW6RO1e64zpxoY=',
> 'private_account': 0, 'population_current': 'undefined'}]
>
>
> 2017/04/05/[$LATEST]4a80f975904746559d2ae8dd180638ed```
>
> Jean-Yves PASQUIER
>
>
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
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