SQLAlchemy 1.2.15 釋出了，SQLAlchemy 是一個 Python 的 SQL 工具包以及資料庫物件關係對映框架。它包含整套企業級持久化模式，專門用於高效和高效能的資料庫訪問。

此版本包含了各種 ORM 級的修復，其中包括 1.2.13 中的一個回退，涉及到與多對多關係的動態關係。

orm

• [orm] [bug] Fixed bug where the ORM annotations could be incorrect for the primaryjoin/secondaryjoin a relationship if one used the pattern ForeignKey(SomeClass.id)

   in the declarative mappings. This pattern would leak undesired annotations into the join conditions which can break aliasing operations done within Query that are not supposed to impact elements in that join condition. These annotations are now removed up front if present.

  References: 

  #4367
  

• [orm] [bug] In continuing with a similar theme as that of very recent #4349, repaired issue with RelationshipProperty.Comparator.any() andRelationshipProperty.Comparator.has() where the “secondary” selectable needs to be explicitly part of the FROM clause in the EXISTS subquery to suit the case where this “secondary” is a 

  Join object.

  References: #4366
  

• [orm] [bug] Fixed regression caused by #4349 where adding the “secondary” table to the FROM clause for a dynamic loader would affect the ability of the Query to make a subsequent join to another entity. The fix adds the primary entity as the first element of the FROM list since Query.join() wants to jump from that. Version 1.3 will have a more comprehensive solution to this problem as well (#4365).

  References: #4363
  

• [orm] [bug] Fixed bug where chaining of mapper options using RelationshipProperty.of_type() in conjunction with a chained option that refers to an attribute name by string only would fail to locate the attribute.
  

orm declarative

• [bug] [declarative] [orm] A warning is emitted in the case that a column() object is applied to a declarative class, as it seems likely this intended to be a Column object.

  References: #4374
  

misc

• Added support for the write_timeout flag accepted by mysqlclient and pymysql to be passed in the URL string.

  References: #4381
  

• Fixed issue where reflection of a PostgreSQL domain that is expressed as an array would fail to be recognized. Pull request courtesy Jakub Synowiec.¶

  References: #4377, #4380

釋出公告

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