How to use custom query scopes in an Eloquent subselect query? - laravel

Question

This works by manually getting the data as an array then repassing it:
public function scopeWhereWhitelisted($query, $value=true, Tenant $tenant)
{
return $query->where(function($query)use($value,$tenant)
{
$user_id_list = $tenant->getWhiteListedUsersGroup()
->users()
->select('users.id')
->lists('id')
->all()
;
$query->{ $value ? 'whereIn' : 'whereNotIn' }('users.id',$user_id_list);
});
}
But I want this to work (comment // indicates the only difference):
public function scopeWhereWhitelisted($query, $value=true, Tenant $tenant)
{
return $query->where(function($query)use($value,$tenant)
{
$user_id_list = $tenant->getWhiteListedUsersGroup()
->users()
->select('users.id')
//->lists('id')
//->all()
;
$user_id_list = $tenant->getWhiteListedUsersGroup()->users()->select('users.id');//->lists('id')->all();
$query->{ $value ? 'whereIn' : 'whereNotIn' }('users.id',$user_id_list);
});
}
I want to be able to create a "real" subselect without having to have duplicate copies of custom query scopes and relationship queries just for each scope. $tenant->getWhiteListedUsersGroup()->users() is a many-to-many relationship
Here is an example of what has to be done to get a real subselect:
public function scopeWhereWhitelisted($query, $value=true, Tenant $tenant)
{
return $query->where(function($query)use($value,$tenant)
{
$query->{ $value ? 'whereIn' : 'whereNotIn' }('users.id',function($query)
{
$query->from('groups_memberships')
// recreating an existing relationship function
->join('groups','groups.id','group_memberships.group_id')
->select('users.id')
// recreating an already existing query scope
->whereNull('deleted_at')
;
});
});
}
This question will most likely apply to both Laravel 4.0+ and 5.0+
This question is NOT answered by How to do this in Laravel, subquery where in
Restructing code so that the query starts from intended sub query will not work as soon as I need a second non-trivial subselect.
The inclusion/exclusion of ->getQuery() has not made a difference.
I have to choose between a fake subselect or non-DRY custom query scopes.
It seems that the main issue is that the subselect engine is forcing me to use a pre-existing $query object that can't be initialized from an existing relationship.
The recreation of soft deletes (whereNull('deleted_at')) is a trivial example, but I might have to recreate a queryscope that could be relatively complicated already.

Answer 1

Is this whats your going after?
$value; //true or false
$tenant->whereHas('user', function($query) use ($value){
$query->whereHas('groupMembership', function($query) use ($value){
$query->whereHas('group', function($query) use ($value){
if($value){ $query->onlyTrashed(); )
});
})
})
This assumes the group relation includes a withTrashed() call on the relation