我正在尝试从包含双嵌套数组的大型文档中投射到数组的扁平表示中,并且我对如何进行操作。
我的文档类似:
{
"id": "1",
"themeId": "e4d3549c-2785-4067-83d6-f396d2212776",
"enabled": false,
"archived": false,
"componentGroups": [
[
{
"componentType": "header",
"enabled": true,
"configurationVariables": {
"text1": "AAA",
"text2": "BBB"
}
}
],
[
{
"componentType": "prompt",
"enabled": true,
"configurationVariables": {
"text1": "AAA",
"text2": "BBB"
}
},
{
"componentType": "proactive",
"enabled": true,
"configurationVariables": {
"text1": "AAA",
"text2": "BBB"
}
}
],
[
{
"componentType": "product-feed",
"enabled": true,
"configurationVariables": {
"text1": "AAA",
"text2": "BBB"
}
}
]
]
}
我试图将其投影到以下结构:
{
"id": "275973",
"themeId": "e4d3549c-2785-4067-83d6-f396d2212776",
"enabled": false,
"archived": false,
"components": [
{
"componentType": "header",
"enabled": true
},
{
"componentType": "prompt",
"enabled": true,
},
{
"componentType": "proactive",
"enabled": true,
},
{
"componentType": "product-feed",
"enabled": true
}
]
]
}
我使用以下查询获得了一些成功:
SELECT T.id,
T.themeId,
T.enabled,
T.archived,
[ { type: C.componentType, enabled: C.enabled } ] AS components
FROM Panels T
JOIN CG IN T.componentGroups
JOIN C IN CG
WHERE T.id IN ("275973")
但是,这返回了每个组件类型的单独记录。我正在尝试将它们折叠在一起,以便所有组件都在包含文档的单个实例中。我希望能够做类似嵌套的选择,可以与外部文档一起加入其中,类似于以下方式:
SELECT T.id,
T.themeId,
T.enabled,
T.archived,
[
SELECT C.componentType, C.enabled
FROM CG IN T.componentGroups
JOIN C IN CG
] AS components
FROM Panels T
WHERE T.id IN ("275973")
这是无效的。我正在寻找有关子/嵌套选择的信息,并通过钻入嵌套数组来返回数据。
documentDB对子查询的支持已计划,但目前不支持。同时,UDFS或将数据客户端作为n记录提取,然后重新构架是今天这样做的最佳方法。对于有兴趣的其他人,这是一个UDF,用于返回查询中的结果,
function transform(doc) {
var result = {};
for (var prop in doc) {
if (prop != "componentGroups") {
result[prop] = doc[prop];
} else {
result["components"] = [];
for(var cgidx in doc["componentGroups"]) {
var componentGroup = doc["componentGroups"][cgidx];
for (var cidx in componentGroup) {
var component = componentGroup[cidx];
result["components"].push({componentType: component.componentType, enabled: component.enabled });
}
}
}
}
return result;
}