3.17.8

• Fix regression in behavior of delete_instance() when traversing nullable foreign-keys, #2952. Introduced in 3.17.6. Recommended that you update.
• Fix bug where joins not cloned when going from join-less -> joined query, refs #2941.

3.17.7

• Add db_url support for psycopg3 via psycopg3://.
• Ensure double-quotes are escaped properly when introspecting constraints.
• A few documentation-related fixes.

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3.17.6

• Fix bug in recursive model.delete_instance() when a table contains foreign-keys at multiple depths of the graph, #2893.
• Fix regression in pool behavior on systems where time.time() returns identical values for two connections. This adds a no-op comparable sentinel to the heap to prevent any recurrence of this problem, #2901.
• Ensure that subqueries inside CASE statements generate correct SQL.
• Fix regression that broke server-side cursors with Postgres (introduced in 3.16.0).
• Fix to ensure compatibility with psycopg3 - the libpq TransactionStatus constants are no longer available on the Connection instance.
• Fix quoting issue in pwiz that could generate invalid python code for double-quoted string literals used as column defaults.

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3.17.5

Fixes package installation issue on 3.12 and newer introduced in the last version.

3.17.4

• Fix bug that could occur when using CASE inside a function, and one or more of the CASE clauses consisted of a subquery. Refs #2873. new fix in #2872 for regression in truthiness of cursor.
• Fix bug in the conversion of TIMESTAMP type in Sqlite on Python 3.12+.
• Fix for hybrid properties on subclasses when aliased (#2888).
• Many fixes for SqliteQueueDatabase (#2874, #2876, #2877).

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3.17.3

• Better fix for #2871 (extraneous queries when coercing query to list), and new fix in #2872 for regression in truthiness of cursor.

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3.17.2

• Full support for psycopg3.
• Basic support for Sqlite jsonb.
• Fix bug where calling list(query) resulted in extra queries, #2871

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3.17.1

• Add bitwise and other helper methods to BigBitField, #2802.
• Add add_column_default and drop_column_default migrator methods for specifying a server-side default value, #2803.
• The new star attribute was causing issues for users who had a field named star on their models. This attribute is now renamed to __star__. #2796.
• Fix compatibility issues with 3.12 related to utcnow() deprecation.
• Add stricter locking on connection pool to prevent race conditions.
• Add adapters and converters to Sqlite to replace ones deprecated in 3.12.
• Fix bug in model_to_dict() when only aliases are present.
• Fix version check for Sqlite native drop column support.
• Do not specify a reconnect= argument to ping() if using MySQL 8.x.

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3.17.0

• Only roll-back in the outermost @db.transaction decorator/ctx manager if an unhandled exception occurs. Previously, an unhandled exception that occurred in a nested transaction context would trigger a rollback. The use of nested transaction has long been discouraged in the documentation: the recommendation is to always use db.atomic, which will use savepoints to properly handle nested blocks. However, the new behavior should make it easier to reason about transaction boundaries - see #2767 for discussion.
• Cover transaction BEGIN in the reconnect-mixin. Given that no transaction has been started, reconnecting when beginning a new transaction ensures that a reconnect will occur if it is safe to do so.
• Add support for setting isolation_level in db.atomic() and db.transaction() when using Postgres and MySQL/MariaDB, which will apply to the wrapped transaction. Note: Sqlite has supported a similar lock_type parameter for some time.
• Add support for the Sqlite SQLITE_DETERMINISTIC function flag. This allows user-defined Sqlite functions to be used in indexes and may be used by the query planner.
• Fix unreported bug in dataset import when inferred field name differs from column name.

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3.16.3

• Support for Cython 3.0.
• Add flag to ManyToManyField to prevent setting/getting values on unsaved instances. This is worthwhile, since reading or writing a many-to-many has no meaning when the instance is unsaved.
• Adds a star() helper to Source base-class for selecting all columns.
• Fix missing binary types for mysql-connector and mariadb-connector.
• Add extract() method to MySQL JSONField for extracting a jsonpath.

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