How to optimize the number of requests in a template?

Question

Flask

There are two related models:

class Contact(db.Model):
    __tablename__ = 'contacts'
    id = db.Column(db.Integer, primary_key=True)
    full_name = db.Column(db.String(255), nullable=False)
    phones = db.relationship('Phone',
                             backref='contact', lazy='dynamic',
                             order_by='Phone.priority, Phone.phone_number')


class Phone(db.Model):
    __tablename__ = 'phones'
    phone_number = db.Column(db.String(10), primary_key=True)
    phone_type = db.Column(db.Integer)
    contact_id = db.Column(db.Integer,
                           db.ForeignKey('contacts.id'),
                           nullable=False)

phone_types = {
    'Internal': 1,
    'External': 2,
    'Mobile': 3,
    'Radio': 4,
}

Now the contact output in the template inside the table looks like this:

<tr>
    <td>{{ contact.full_name }}</td>
    {%- for phone_type_key, phone_type_value in phone_types|dictsort(by='value') -%}
        <td>
            {%- for phone in contact.phones if phone.phone_type == phone_type_value -%}
            {{ phone.phone_number }}<br>
            {%- endfor -%}
        </td>
    {%- endfor -%}
</tr>

Those. a separate query is generated for each phone_type column. Is it possible to optimize this somehow?