MongoOperations findAndModify and updateFirst do not include the _class in Map values [DATAMONGO-1236]

[spring-projects-issues]

Amy Aldredge opened DATAMONGO-1236 and commented

When a map of type LinkedHashMap<String, Object> is updated via MongoOperations findAndModify or updateFirst, the _class field is not saved for the map values. Therefore, later reads of the data do not convert the value to the correct type, instead leaving it as LinkedHashMap.

Please see attached maven project for test illustrating the problem.

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Affects: 1.6.2 (Evans SR2)

Attachments:

• updatemapbug.zip (4.83 kB)

Referenced from: pull request #301

Backported to: 1.7.1 (Fowler SR1), 1.6.3 (Evans SR3)

[spring-projects-issues]

Amy Aldredge commented

This is also a problem when updating a single field in the document if the field is an Object.

[spring-projects-issues]

Christoph Strobl commented

thanks Amy Aldredge for report and tests - good catch! As it seems update mapping does not correctly pass on type hints for the defined map value type. will have to check