title: TypeORM save data with relation
body: <p>I am actually saving data with 2 differents succesive create() (then save in my services) with this following code in my controller:</p>
  <pre><code>const ticket: Partial&lt;Ticket&gt; = {
    ticketId: ticketId,
    dispatch: dispatch,
  };
  
  const ticket = await this.ticketsService.create(ticket);
  
  const missions: Partial&lt;Mission&gt;[] = body.items.map((mission) =&gt; ({ 
    missionId: mission.missionId, 
    folderId: mission.folderId, 
    ticket: ticket 
  }));
  
  await this.missionsService.create(missions);
  </code></pre>
  <p>I would like to do something like this:</p>
  <pre><code>const missions: Partial&lt;Mission&gt;[] = body.items.map((mission) =&gt; ({ 
    missionId: mission.missionId, 
    folderId: mission.folderId
  }));
  
  const ticket: Partial&lt;Ticket&gt; = {
    ticketId: ticketId,
    dispatch: dispatch,
    mission: missions
  };
  
  await this.ticketsService.create(ticket);
  </code></pre>
  <p>Is it possible ?</p>