# New features

* f-strings support in queries: select(f'{s.name} - {s.age}' for s in Student)
* ponyorm#344: It is now possible to specify offset without limit: `query.limit(offset=10)`
* ponyorm#371: Support of explicit casting of JSON expressions to `str`, `int` or `float`
* `@db.on_connect` decorator added

# Bugfixes

* Fix bulk delete bug introduced in 0.7.4
* ponyorm#370 Fix memory leak introduced in 0.7.4
* Now exists() in query does not throw away condition in generator expression: `exists(s.gpa > 3 for s in Student)`
* ponyorm#373: 0.7.4/0.7.5 breaks queries using the `in` operator to test membership of another query result
* ponyorm#374: `auto=True` can be used with all PrimaryKey types, not only int
* ponyorm#369: Make QueryResult looks like a list object again: add concatenation with lists, `.shuffle()` and `.to_list()` methods
* ponyorm#355: Fix binary primary keys `PrimaryKey(buffer)` in Python2
* Interactive mode support for PyCharm console
* Fix wrong table aliases in complex queries
* Fix query optimization code for complex queries

# Features since 0.7.5:

* f-strings support in queries: `select(f'{s.name} - {s.age}' for s in Student)`
* ponyorm#344: It is now possible to specify offset without limit: `query.limit(offset=10)`
* ponyorm#371: Support of explicit casting of JSON expressions to `str`, `int` or `float`
* `@db.on_connect` decorator added

# Bugfixes

* Fix bulk delete bug introduced in 0.7.4
* ponyorm#370 Fix memory leak introduced in 0.7.4
* Now `exists()` in query does not throw away condition in generator expression: `exists(s.gpa > 3 for s in Student)`
* ponyorm#373: 0.7.4/0.7.5 breaks queries using the `in` operator to test membership of another query result
* ponyorm#374: `auto=True` can be used with all PrimaryKey types, not only `int`
* ponyorm#369: Make QueryResult looks like a list object again: add concatenation with lists, `.shuffle()` and `.to_list()` methods
* ponyorm#355: Fix binary primary keys `PrimaryKey(buffer)` in Python2
* Interactive mode support for PyCharm console
* Fix wrong table aliases in complex queries
* Fix query optimization code for complex queries
* Fix a bug with hybrid properties that use external functions

…94/pony-orm-why-do-i-get-an-assertion-error-when-using-the-exists-command

…g db_session.__exit__()

…se in the same session

…statements now return a list

…objects

…oss different db_sessions

# Major features

* Array type support for PostgreSQL and SQLite
* isinstance() support in queries
* Support of queries based on collections: select(x for x in y.items)

# Other features

* Support of Entity.select(**kwargs)
* Support of SKIP LOCKED option in 'SELECT ... FOR UPDATE'
* New function make_proxy(obj) to make cros-db_session proxy objects
* Specify ON DELETE CASCADE/SET NULL in foreign keys
* Support of LIMIT in `SELECT FROM (SELECT ...)` type of queries
* Support for negative JSON array indexes in SQLite

# Improvements

* Improved query prefetching: use fewer number of SQL queries
* Memory optimization: deduplication of values recieved from the database in the same session
* increase DBAPIProvider.max_params_count value

# Bugfixes

* ponyorm#405: breaking change with cx_Oracle 7.0: DML RETURNING now returns a list
* ponyorm#380: db_session should work with async functions
* ponyorm#385: test fails with python3.6
* ponyorm#386: release unlocked lock error in SQLite
* ponyorm#390: TypeError: writable buffers are not hashable
* ponyorm#398: add auto coversion of numpy numeric types
* ponyorm#404: GAE local run detection
* Fix Flask compatibility: add support of LocalProxy object
* db_session(sql_debug=True) should log SQL commands also during db_session.__exit__()
* Fix duplicated table join in FROM clause
* Fix accessing global variables from hybrid methods and properties
* Fix m2m collection loading bug
* Fix composite index bug: stackoverflow.com/questions/53147694
* Fix MyEntity[obj.get_pk()] if pk is composite
* MySQL group_concat_max_len option set to max of 32bit platforms to avoid truncation
* Show all attribute options in show(Entity) call
* For nested db_session retry option should be ignored
* Fix py_json_unwrap
* Other minor fixes