用于将新对象更新为 JSON 数组的 Couchbase N1ql 查询

Question

我有以下示例 JSON

"address":{
    "details":
    [
        {
        "id"        :<system generated UUID>,
        "city"      :{"type"        : "string"},
        "country"   :{"type"        : "string"},
        "name"      :{"type"        : "string"},
        "url"       :{"type"        : "string"},
        "contacts"  :
                [{
                "email":{"type"        : "string"},
                "phone":{"type"        : "number"}
                }]
        }
    ]
}

我希望数据采用以下方式 示例 1：

"address":
{
  "details": [
    {
      "id": 1234,
      "city": "Medway",
      "country": "United Kingdom",
      "name": "Medway Youth Hostel",
      "url": "http://www.yha.org.uk"
    }]
}

示例 2：

"address":
{
  "details": [
    {
      "id": 1234,
      "city": "Medway",
      "country": "United Kingdom",
      "name": "Medway Youth Hostel",
      "url": "http://www.yha.org.uk",
      "contact": [
        {
          "email": "hari34@gmail.com",
          "phone": 6789435634
        }
          ]
    }]
}  

示例 3：

"address":
{
  "details": [
    {
      "id": 1234,
      "city": "Medway",
      "country": "United Kingdom",
      "name": "Medway Youth Hostel",
      "url": "http://www.yha.org.uk",
      "contact": [
        {
          "email": "hari34@gmail.com",
          "phone": 6789435634
        },
        {
          "email": "sri123@gmail.com",
          "phone": 9876655555
        }
          ]
    }]
}

示例 4：

"address":
{
  "details": [
    {
      "id": 1234,
      "city": "Medway",
      "country": "United Kingdom",
      "name": "Medway Youth Hostel",
      "url": "http://www.yha.org.uk",
      "contact": [
        {
          "email": "hari34@gmail.com",
          "phone": 6789435634
        }
      ]
    },
    {
      "id": 3456,
      "city": "Texas",
      "country": "USA",
      "name": "Texas Youth Hostel",
      "url": "http://www.yha.org.uk",
      "contact": [
        {
          "email": "ram123@gmail.com",
          "phone": 876543219
        }
      ]
    }
  ]
}

我对 n1ql 查询非常陌生，有人能帮我找到在对象中插入/更新数组到对象的解决方案吗？示例 1 将数据插入 JSON，示例 2 将数据更新为示例 1，然后... 1. 请帮助获取满足上述示例的 n1ql 查询。 2.如何在文档中生成一个UUID转id字段

Answer 1

1) 追加数组从不检查数组中是否已存在元素

INSERT INTO default VALUES ("k01", { "details": [ { "id": 1234, "city": "Medway", "country": "United Kingdom", "name": "Medway Youth Hostel", "url": "http://www.yha.org.uk" }] });

UPDATE default AS d SET e.contact = [ { "email": "hari34@gmail.com", "phone": 6789435634 } ]
                           FOR e IN d.details WHEN e.id = 1234 END
WHERE META().id = "k01";

UPDATE default AS d SET e.contact = ARRAY_APPEND(e.contact,{ "email": "sri123@gmail.com", "phone": 9876655555 })
                           FOR e IN d.details WHEN e.id = 1234 END
WHERE META().id = "k01";

UPDATE default AS d SET d.details = ARRAY_APPEND(d.details,{ "id": 3456, "city": "Texas", "country": "USA", "name": "Texas Youth Hostel", "url": "http://www.yha.org.uk", "contact": [ { "email": "ram123@gmail.com", "phone": 876543219 } ] })
WHERE META().id = "k01";

SELECT * from default USE KEYS["k01"];

2) 使用 UUID() 函数，如下所示

INSERT INTO default VALUES ("k01", { "details": [ { "id": UUID(), "city": "Medway", "country": "United Kingdom", "name": "Medway Youth Hostel", "url": "http://www.yha.org.uk" }] });