can't serialice an LDAP entry model

[sanslash332]

Using python 3.7.0,
On the last version of flask_ldapconn (0.10.0)
when you try to serialize as json an object created from a ldap Model, throws this exception:
TypeError: Object of type LDAPAttribute is not JSON serializable

In flask_ldapconn 0.7.0 this didn't happen and works perfectli. what changed on these versions?

this is the model:

class User(LDAPEntry):

base_dn = settings.config[config_name].LDAP_BASE_DN
object_classes = ['posixAccount']

name = Attribute('cn')
email = Attribute('mail')
userid = Attribute('uid')
surname = Attribute('sn')
givenname = Attribute('givenName')
manager = Attribute('manager')
groups = Attribute('memberOf')
phone = Attribute('mobile')
organization = Attribute('o')
organizationUnit = Attribute('ou')

def to_json(self):
    return jsonify(
        dn=self._dn,
        username=self.userid,
        firstName=self.givenname,
        lastName=self.surname,
        email=self.email,
        name=self.name,
        phone=self.phone,
        manager=self.manager,
        ldapGroups=self.groups,
        company=self.organization,
        unit=self.organizationUnit,


    )

In 0.7.0 you can call toJson and works perfectly!
but with 0.10.0 it completely fails.
how to fix that?

For the configuration, I used the default values.

Thanks!

[sanslash332]

Checking more the problem, I discovered that using the 0.10.0 version, all attributes after get an entry, are completely empty.

Without any value.

But Connecting to the same server, same model. And same configuration using the old version, all attributes are correctly populated.

Thanks.