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AttributeError: module 'symbol' has no attribute 'list_for' with Python 3 #288

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lukashambsch opened this Issue Aug 23, 2017 · 2 comments

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lukashambsch commented Aug 23, 2017

I'm in the process of upgrading our app to use Python 3. Specifically I'm using Python 3.6.2. While making this upgrade I started getting this error (AttributeError: module 'symbol' has no attribute 'list_for') when running the following line of code:

items = items.filter('i.id in [2]')

Is there a different way I should be writing this query to work with Python 3? I need to use the string query format so that I can build the query as a part of our api.

@kozlovsky kozlovsky closed this in f31b796 Aug 24, 2017

@kozlovsky kozlovsky self-assigned this Aug 24, 2017

@kozlovsky kozlovsky added the bug label Aug 24, 2017

@kozlovsky kozlovsky added this to the 0.7.3 milestone Aug 24, 2017

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Thanks for reporting, should work now!

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kozlovsky commented Aug 24, 2017

Thanks for reporting, should work now!

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lukashambsch Aug 25, 2017

Awesome! Thanks for the quick fix!

lukashambsch commented Aug 25, 2017

Awesome! Thanks for the quick fix!

kozlovsky added a commit that referenced this issue Oct 23, 2017

Pony ORM Release 0.7.3 (2017-10-23)
# New features

* `where()` method added to query
* `coalesce()` function added
* `between(x, a, b)` function added
* #295: Add `_table_options_` for entity class to specify engine, tablespace, etc.
* Make debug flag thread-local
* `sql_debugging` context manager added
* `sql_debug` and show_values arguments to db_session added
* `set_sql_debug` function added as alias to (to be deprecated) `sql_debug` function
* Allow `db_session` to accept `ddl` parameter when used as context manager
* Add `optimistic=True` option to db_session
* Skip optimistic checks for queries in `db_session` with `serializable=True`
* `fk_name` option added for attributes in order to specify foreign key name
* #280: Now it's possible to specify `timeout` option, as well as pass other keyword arguments for `sqlite3.connect` function
* Add support of explicit casting to int in queries using `int()` function
* Added modulo division % native support in queries

# Bugfixes

* Fix bugs with composite table names
* Fix invalid foreign key & index names for tables which names include schema name
* For queries like `select(x for x in MyObject if not x.description)` add "OR x.info IS NULL" for nullable string columns
* Add optimistic checking for `delete()` method
* Show updated attributes when `OptimisticCheckError` is being raised
* Fix incorrect aliases in nested queries
* Correctly pass exception from user-defined functions in SQLite
* More clear error messages for `UnrepeatableReadError`
* Fix `db_session(strict=True)` which was broken in 2d3afb2
* Fixes #170: Problem with a primary key column used as a part of another key
* Fixes #223: incorrect result of `getattr(entity, attrname)` when the same lambda applies to different entities
* Fixes #266: Add handler to `"pony.orm"` logger does not work
* Fixes #278: Cascade delete error: FOREIGN KEY constraint failed, with complex entity relationships
* Fixes #283: Lost Json update immediately after object creation
* Fixes #284: `query.order_by()` orders Json numbers like strings
* Fixes #288: Expression text parsing issue in Python 3
* Fixes #293: translation of if-expressions in expression
* Fixes #294: Real stack traces swallowed within IPython shell
* `Collection.count()` method should check if session is alive
* Set `obj._session_cache_` to None after exiting from db session for better garbage collection
* Unload collections which are not fully loaded after exiting from db session for better garbage collection
* Raise on unknown options for attributes that are part of relationship
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