retrieve nested attributes using eloquent (eager loading needed?)

I've currently no idea how to get this done in a smart way. I would like to prevent writing tons of querys. First my table design:

users:
|id|username|

tickets:
|id|user_id|

ticket_replies:
id|ticket_id|user_id|

files:
|id|ticket_replie_id|name

my controllers:

user:
public function tickets()
{
    return $this->hasMany('App\ticket');
}

ticket:
public function ticket_replie() 
{
    return $this->hasMany('App\ticket_replie', 'ticket_id', 'id');
}

ticket_replie:
public function file() 
{
    return $this->hasOne('App\File', 'ticket_replie_id', 'id');
}

Each ticket_replie can be related to only one attachment (only one attachmentper ticket_replie), that's why I use hasOne relation. Now I need to retrieve the name of a file for a given ticket & ticket_replie_id. In my controller I use this at the moment:

$ticket = Auth::user()->tickets()->where('tickets.id', $id)->where('files.ticket_replie_id', $attachment_id)->firstOrFail();

Laravel generates me this query & error:

select * from `tickets` where `tickets`.`user_id` = 1 and `tickets`.`user_id` is not null and `tickets`.`id` = 43 and `files`.`ticket_replie_id` = 39 limit 1

Column not found: 1054 Unknown column 'files.ticket_replie_id' in 'where clause

The query must be something like:

select * from `tickets`, `files` where `tickets`.`user_id` = 1 and `tickets`.`user_id` is not null and `tickets`.`id` = 43 and `files`.`ticket_replie_id` = 39 limit 1

When I run this query in my database, it returns the needed informations. Is my way to retrieve the information okay? Where's my fault, because at the moment the query generated by Eloquent isn't working as described above. In case there's a easier way, just tell me.

The fault is caused because there's no "relation" between the ticket and the files model directly or am I wrong?