AQL嵌套数组值

我是ArangoDB和AQL的新手，我的问题与嵌套数组值有关 . 我不知道是否有办法可以做到（或者即使我的查询被有效写入）

为了简短起见，我有2个收藏 . 一个用于“医生”，一个用于“指示” . 每次我的病人看医生进行咨询时，他/她的症状列表都记录在指征集合中 . 但是，之前的诊断可能是由另一位医生做出的 . 在这种情况下，我的AQL语法如下所示：

FOR p in Patients
FILTER p._key=="cad010117"
RETURN {
   "name" : CONCAT(p.pfname, " ", p.plastname),
   "consultations" : (
       FOR i in Indications
       FILTER i.pat_id == p._key
          FOR d in Physicians
          FILTER i.ind_consul_doc == d._key

          RETURN {
              "Doctor" : CONCAT(d.dtitle, " ", d.dfirstname, " ", d.dlastname),
              "Consult Date" : i.ind_consul_dt,
              "Symptoms" : i.symptoms[*],
              "Past Diagnoses" : i.diagnosis[* RETURN {
                      "Condition" : CURRENT.diag, 
                      "Diagnosed on" : CURRENT.diag_dt, 
                      "Diagnosed by" : CURRENT.diag_doc
                  }
              ]
          }
   )

我的相应结果：

[
  {
    "name": "Alfred Jeffries",
    "consultations": [
      {
        "Doctor": "Dr Anthony Garcia",
        "Consult Date": "22nd Jun 2016",
        "Symptoms": [
          {
            "type": "hyperpyrexia",
            "details": "Temperature: 101",
            "duration": "3d"
          },
          {
            "type": "anxiety",
            "details": "Severe",
            "duration": "1w"
          },
          {
            "type": "mania",
            "details": "Moderate",
            "duration": "1w"
          },
          {
            "type": "diaphoresis",
            "details": "Increased sweating during the day only",
            "duration": "3d"
          }
        ],
        "Past Diagnoses": [
          {
            "Condition": "Bipolar Disorder",
            "Diagnosed on": "6th Jul 2016",
            "Diagnosed by": "dc666555"
          }
        ]
      }
    ]

我的问题是，对于返回的Past Diagnoses数组，diag_doc字段（我的"Indications"集合中诊断数组中的值）对应于进行诊断的医生的"Physicians"集合中的_key值 . 使用AQL返回diag_doc的完整详细信息的最佳方法是什么？先感谢您 .

PS：我正在使用ArangoDB 3.1.12