title: Laravel 5 saving and updating models with relationship
body: <p>First thank for watch my question and sorry for my poor english.</p>
  
  <p>I have two models :</p>
  
  <p>User Model  with the next relationship:</p>
  
  <pre><code>public function datosAlumno()
  {
      return $this-&gt;hasOne('sj\Models\DatosAlumno','alumno_id');
  }
  </code></pre>
  
  <p>and DatosAlumno model :</p>
  
  <pre><code>public function alumno(){
      return $this-&gt;belongsTo('sj\Models\User','alumno_id');
  }
  </code></pre>
  
  <p>if I print with dd(\Request::all()) :</p>
  
  <pre><code>array:16 [▼
      "_method" =&gt; "PUT"
      "_token" =&gt; "vnQp4msoo8UHGan5m4v8VYvX1kKYx8HnbhqaywZH"
      "rut" =&gt; "111111111111"
      "nombre" =&gt; "AAAAAAAAAA"
      "apellido_paterno" =&gt; "BBBBBBBBBBB"
      "apellido_materno" =&gt; "CCCCCCCCCCCC"
      "sexo" =&gt; "masculino"
      "comuna_id" =&gt; "13"
      "direccion" =&gt; "RRRRRRRRRRRRRRRRRRRRRR"
      "telefono_fijo" =&gt; "14876955"
      "telefono_movil" =&gt; "3333333333"
      "fecha_nacimiento" =&gt; "2000-11-03"
      "email" =&gt; "michelle76@conroy.com"
      "datosAlumno" =&gt; array:1 [▼
          "apoderado_id" =&gt; "37"
      ]
      "password" =&gt; ""
      "password_confirmation" =&gt; ""
  ]
  </code></pre>
  
  <p>I'm trying save or update "datosAlumno" but when I use save, push or update the field doesn't change in the database</p>
  
  <pre><code>public function update($id)
  {
      $user = User::with('datosAlumno')-&gt;find($id);
      $user-&gt;fill(\Request::all());
      $user-&gt;push();
  }
  </code></pre>
  
  <p>If I do <code>dd($user-&gt;datosAlumno)</code> after to fill with <code>\Request::all()</code> I get this :</p>
  
  <pre><code>DatosAlumno {#297 ▼
      #table: "datos_alumno"
      #fillable: array:2 [▼
          0 =&gt; "alumno_id"
          1 =&gt; "apoderado_id"
      ]
      #connection: null
      #primaryKey: "id"
      #perPage: 15
      +incrementing: true
      +timestamps: true
      #attributes: array:6 [▼
          "id" =&gt; 1
           "alumno_id" =&gt; 97
           "apoderado_id" =&gt; 15
           "deleted_at" =&gt; null
           "created_at" =&gt; "0000-00-00 00:00:00"
           "updated_at" =&gt; "0000-00-00 00:00:00"
      ]
      #original: array:6 [▼
          "id" =&gt; 1
          "alumno_id" =&gt; 97
          "apoderado_id" =&gt; 15
          "deleted_at" =&gt; null
          "created_at" =&gt; "0000-00-00 00:00:00"
          "updated_at" =&gt; "0000-00-00 00:00:00"
      ]
      #relations: []
      #hidden: []
      #visible: []
      #appends: []
      #guarded: array:1 [▶]
      #dates: []
      #casts: []
      #touches: []
      #observables: []
      #with: []
      #morphClass: null
      +exists: true
  }
  </code></pre>