Peewee

Fixed Python 2/3 incompatibility with `itertools.izip_longest()`.

[View commits](https://github.com/coleifer/peewee/compare/3.1.4...3.1.5)

* Added `BigAutoField` to support 64-bit auto-incrementing primary keys.
* Use Peewee-compatible datetime serialization when exporting JSON from
a `DataSet`. Previously the JSON export used ISO-8601 by default. See 1536.
* Added `Database.batch_commit` helper to wrap iterators in chunked
transactions. See 1539 for discussion.

[View commits](https://github.com/coleifer/peewee/compare/3.1.3...3.1.4)

* Fixed issue where scope-specific settings were being updated in-place instead
of copied. 1534.
* Fixed bug where setting a `ForeignKeyField` did not add it to the model's
"dirty" fields list. 1530.
* Use pre-fetched data when using `prefetch()` with `ManyToManyField`. Thanks
to iBelieve for the patch. 1531.
* Use `JSON` data-type for SQLite `JSONField` instances.
* Add a `json_contains` function for use with SQLite `json1` extension.
* Various documentation updates and additions.

[View commits](https://github.com/coleifer/peewee/compare/3.1.2...3.1.3)

New behavior for INSERT queries with RETURNING clause

Investigating 1522, it occurred to me that INSERT queries with non-default
*RETURNING* clauses (postgres-only feature) should always return a cursor
object. Previously, if executing a single-row INSERT query, the last-inserted
row ID would be returned, regardless of what was specified by the RETURNING
clause.

This change only affects INSERT queries with non-default RETURNING clauses and
will cause a cursor to be returned, as opposed to the last-inserted row ID.

[View commits](https://github.com/coleifer/peewee/compare/3.1.1...3.1.2)

* Fixed bug when using `Model.alias()` when the model defined a particular
database schema.
* Added `SchemaManager.create_foreign_key` API to simplify adding constraints
when dealing with circular foreign-key relationships. Updated docs
accordingly.
* Improved implementation of `Migrator.add_foreign_key_constraint` so that it
can be used with Postgresql (in addition to MySQL).
* Added `PickleField` to the `playhouse.fields` module. [Docs](http://docs.peewee-orm.com/en/latest/peewee/playhouse.html#PickleField).
* Fixed bug in implementation of `CompressedField` when using Python 3.
* Added `KeyValue` API in `playhouse.kv` module. [Docs](http://docs.peewee-orm.com/en/latest/peewee/playhouse.html#key-value-store).
* More test cases for joining on sub-selects or common table expressions.

[View commits](https://github.com/coleifer/peewee/compare/3.1.0...3.1.1)

Backwards-incompatible changes

`Database.bind()` has been renamed to `Database.bind_ctx()`, to more closely
match the semantics of the corresponding model methods, `Model.bind()` and
`Model.bind_ctx()`. The new `Database.bind()` method is a one-time operation
that binds the given models to the database. See documentation:

* [Database.bind()](http://docs.peewee-orm.com/en/latest/peewee/api.html#Database.bind)
* [Database.bind_ctx()](http://docs.peewee-orm.com/en/latest/peewee/api.html#Database.bind_ctx)

Other changes

* Removed Python 2.6 support code from a few places.
* Fixed example analytics app code to ensure hstore extension is registered.
* Small efficiency improvement to bloom filter.
* Removed "attention!" from *README*.

[View commits](https://github.com/coleifer/peewee/compare/3.0.20...3.1.0)