ProgrammingError when searching for records

[Andreas Porevopoulos]

Hello,
I am trying to search for a record in the record list page and I am getting back this message:

ProgrammingError: (ProgrammingError) operator does not exist: integer + boolean
LINE 4: WHERE 0 + (email LIKE '%' || '[e-mail]' || '%')) AS an...

The column I am searching is declared with search_fields at the ModelAdmin class.
I am using Sqlalchemy.

Any help will be much appreciated.

Thank you very much
Andreas

[Andreas Porevopoulos]

Additionaly the equals operator "=" is mapped wrong to "==".
Searching for "=email" produses the following error:

ProgrammingError: (ProgrammingError) operator does not exist: character varying == unknown
LINE 4: WHERE email == 'asd') AS anon_1

Andreas