Question

我目前正在尝试从数组中查询特定对象。但是，查询结果返回的是单个对象，而不是大小为1的数组（其中一个对象填充了该数组）。

我的查询：

SELECT meta(bn).id as _ID, meta(bn).cas as _CAS, bn.name
    FIRST t FOR t IN properties WHEN t.id = "1111" END as property
FROM bucket-name as bn
WHERE ANY t IN attributes SATISFIES t.id = "1111" END

结果：

[
{
    "_CAS": 0000,
    "_ID": "1111",
    "name": "my name",
    "property": {
        "id": "1111",
        "name": "my property name"
    }
}
]

我宁愿得到的是。几乎完全一样，只是“属性”现在是一个数组

[
{
    "_CAS": 0000,
    "_ID": "1111",
    "name": "my name",
    "property": [
        {
            "id": "1111",
            "name": "my property name"
        }
    ]
}
]

Answer 1

首先更改为阵列https://docs.couchbase.com/server/current/n1ql/n1ql-language-reference/collectionops.html 使用FIRST时，循环在第一个元素满足时停止并返回该元素。使用ARRAY时，循环将一直持续到结束，并且所有合格元素都将作为ARRAY（即列表）返回

SELECT meta(bn).id as _ID, meta(bn).cas as _CAS, bn.name
    ARRAY t FOR t IN properties WHEN t.id = "1111" END AS property
FROM `bucket-name` as bn
WHERE ANY t IN attributes SATISFIES t.id = "1111" END;

将查询返回的对象嵌套为大小为1的数组

1 个答案: