Populate symfony admin generator's select field based on schema - symfony1

Question

I've inherited the development of a symfony 1.4 app (though It's my first symfony project).
After digging a bit on that app I've discovered a bug that is driving me nuts.
On the admin generator list page of a module there are two select fields in the filter form that should list each one a type of users (partners and clients), however both listings show all the users.
The generator.yml shows that both select fields should be populated by parter_id and client_id
[...]
filter:
display: [date, client_id, partner_id, ...]
form: ~
edit: ~
new: ~
[...]
Looking at the schema of the module it's obvious why symfony is populating the select fields with the same content because the relations of both client_id and partner_id are equivalent:
SomeModule:
tableName: client_requests
columns:
id: {type: integer, primary: true, autoincrement: true}
partner_id: {type: integer, notnull: true}
client_id: {type: integer, notnull: true}
date: {type: timestamp}
...
relations:
partner:
class: sfGuardUser
local: partner_id
foreign: id
type: one
client:
class: sfGuardUser
local: client_id
foreign: id
type: one
As per the above schema symfony has no other choice but to generate the select fields as:
select * from sf_guard_user;
The difference between partner and client is made by sfGuardGroup and sfGuardUserGroup, the related parts of the schema from ./plugins/sfDoctrineGuardPlugin/config/doctrine/schema.yml are:
sfGuardGroup:
actAs: [Timestampable]
columns:
name:
type: string(255)
unique: true
description: string(1000)
relations:
Users:
class: sfGuardUser
refClass: sfGuardUserGroup
local: group_id
foreign: user_id
foreignAlias: Groups
...
sfGuardUser:
actAs: [Timestampable]
columns:
first_name: string(255)
last_name: string(255
...
relations:
Groups:
class: sfGuardGroup
local: user_id
foreign: group_id
refClass: sfGuardUserGroup
foreignAlias: Users
Permissions:
class: sfGuardPermission
local: user_id
foreign: permission_id
refClass: sfGuardUserPermission
foreignAlias: Users
...
What I would like to is to generate those fields with a query like:
select u.*
from sf_guard_user as u
JOIN (sf_guard_user_group as ug JOIN sf_guard_group as g
ON (ug.group_id = g.id)) ON (u.id = ug.user_id)
where g.name = 'partner';
I've researched for a way to edit the module's schema to reflect the relation between client_id and partner_id with their group name to get the filter form select fields right, but I've ended believing that that is a wrong approach
¿is it possible to modify the module's schema to allow symfony to populate correctly the select fields?
¿or that approach is completely wrong and instead I should hack the methods that render those fields to populate them with the right queries? If so hints in that direction would be appreciated.
Thanks

Answer 1

Just edit your form (probably sfGuardUserForm) and add the query to the partner_id widget. Something like:
$query = Doctrine::getTable('sfGuardUser')->createQuery('u')->etc etc...
$this->widgetSchema['partner_id']->setOption('query', $query)
You'll probably need to do the same to the validator for that field:
$this->validatorSchema['partner_id']->setOption('query', $query)
If you cannot edit that specific form (maybe it is used in another part of the app), just make a new one that extends it. And then, you just need to specify the form class in the generator.yml file.