TypeConverter not used for inserting/updating type Object

TypeConverters are working wonderfully for reading/querying and writing/inserting/updating data except for one case: when you’re trying to insert/update and expect a value to be converted before being bound to the statement.

You can see in this code where the problem is:

https://github.com/micronaut-projects/micronaut-data/blob/23075f01c2aa26ed23311c634e16abf6bcc239a0/data-runtime/src/main/java/io/micronaut/data/runtime/mapper/QueryStatement.java#L40

All other data types have a nice callout to convertRequired except for the Object. This means my TypeConvert doesn’t get utilized, resulting in a JDBC error. The specific use case is I’m trying to convert into JSONB type in Postgres. Interestingly, it works on queries because the code doesn’t even try to understand the underlying type, it simply passes all ResultSet values off to the type converters:

https://github.com/micronaut-projects/micronaut-data/blob/23075f01c2aa26ed23311c634e16abf6bcc239a0/data-runtime/src/main/java/io/micronaut/data/runtime/mapper/sql/SqlResultEntityTypeMapper.java#L229

I’ll see if I can get you a patch soon!

[zearic]

I have the similar issue when use a List of JsonType, e.g.

@TypeDef(type = DataType.JSON)
List<User> users;

Query and Create are ok. but got error when update this field to postgres DB: The column index is out of range I found a work around: create wrapper for the List, e.g

@TypeDef(type = DataType.JSON)
UserList users;

UserList is just a wrapper:

public class UserList{
   List<User> userList;
}

Hope this can help anyone has the same issue.

[mchmielarz]

Thanks @zearic for the tip. I still have the issue storing Map in JSONB column and have to use the workaround.