API Platform filter entity data - symfony

Question

I just start to use Api platform and immediately stuck with problem how to filter data.
I have entity User and i want to filter data that are present in response ( JSON API format)
{
"links": {
"self": "/api/users"
},
"meta": {
"totalItems": 2,
"itemsPerPage": 30,
"currentPage": 1
},
"data": [
{
"id": "/api/users/1",
"type": "User",
"attributes": {
"_id": 1,
"username": "jonhdoe",
"isActive": true,
"address": null
}
},
{
"id": "/api/users/3",
"type": "User",
"attributes": {
"_id": 3,
"username": "test",
"isActive": true,
"address": null
}
}
]
}
so I want to remove e.g. User with id 3, but not use filters sent via request. I just want to set filter that will be always run when someone go to /api/users.
I look to api-platform extensions but this will be applied on each request e.g. /api/trucks. So at end I just want to get something like
{
"links": {
"self": "/api/users"
},
"meta": {
"totalItems": 1,
"itemsPerPage": 30,
"currentPage": 1
},
"data": [
{
"id": "/api/users/1",
"type": "User",
"attributes": {
"_id": 1,
"username": "jonhdoe",
"isActive": true,
"address": null
}
}
]
}

Answer 1

As you pointed out, extensions are the way to go.
The applyToCollection method gets a $resourceClass parameter containing the current resource class.
So you can apply the WHERE clause only for a specific class in this method like:
public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, string $operationName = null)
{
if (User::class === $resourceClass) {
$queryBuilder->doSomething();
}
// Do nothing for other classes
}