[英]how to update an object of an element in array in mongodb?
这是我的结构,如果 object 键匹配,我想更新嵌套数组元素 - 我想匹配 grnno:"10431000" 并更新该 object 的其他键,例如 vehicle_no、invoice_no 等。
{
"_id" : ObjectId("5f128b8aeb27bb63057e3887"),
"requirements" : [
{
"grns" : [
{
"invoice_no" : "123",
"vehicle_no" : "345",
"req_id" : "5f128c6deb27bb63057e388a",
"grnno" : "10431000"
},
{
"invoice_no" : "abc",
"vehicle_no" : "def",
"req_id" : "5f128c6deb27bb63057e388a",
"grnno" : "10431001"
}
]
}
]
}
我试过这段代码
db.po_grn.update({
"requirements.grns.grnno":"10431001"
}, {
$set: {
"requirements.$.grns": {"invoice_no":"test",vehicle_no:"5455"}
}
})
但这正在改变我这样的结构
"requirements" : [
{
"grns" : {
"invoice_no" : "test",
"vehicle_no":"5455"
},
"req_id" : ObjectId("5f128b8aeb27bb63057e3886")
}
],
grns 键应该是数组,更新应该是与键“grnno”匹配的特定 object。 请帮帮我。 谢谢。
==编辑==
var grnno = req.body.grnno;
db.po_grn.find({
"requirements.grns.grnno":grnno
}).toArray(function(err, po_grn) {
console.log("po_grn",po_grn);
if (po_grn.length > 0) {
console.log("data.grn.grnno ", grnno);
var query = {
requirements: {
$elemMatch: {
"grns.grnno": grnno
}
}
};
var update = {
$set: {
'requirements.$[].grns.$[inner].invoice_no': data.invoice_no,
'requirements.$[].grns.$[inner].vehicle_no': data.vehicle_no,
}
};
var options = {
arrayFilters: [
{ "inner.grnno" : grnno }
]
};
db.po_grn.update(query, update, options
, function(er, grn) {
console.log("grn",grn,"er",er)
res.send({
status: 1,
message: "Grn updated successfully"
});
}
);
} else {
res.send({
status: 0,
message: "Grn not found "
});
}
})
使用$[]
positional-all 运算符与array filters
的组合来更新您的内部嵌套文档。
var query = {
requirements: {
$elemMatch: {
"grns.grnno": "10431001"
}
}
};
var update = {
$set: {
'requirements.$[].grns.$[inner].invoice_no': "test",
'requirements.$[].grns.$[inner].vehicle_no': "5455",
}
};
var options = {
arrayFilters: [
{ "inner.grnno" : "10431001" }
]
};
db.collection.update(query, update, options);
更新 -
附上NodeJS本机MongoDb驱动代码,工作正常
const { MongoClient } = require('mongodb');
const url = "mongodb://localhost:27017/";
MongoClient.connect(url, function(err, db) {
if (err) {
throw err;
}
const dbo = db.db("test");
(async() => {
const query = {
requirements: {
$elemMatch: {
"grns.grnno": "10431001"
}
}
};
const update = {
$set: {
'requirements.$[].grns.$[inner].invoice_no': "test",
'requirements.$[].grns.$[inner].vehicle_no': "5455",
}
};
const options = {
arrayFilters: [
{ "inner.grnno" : "10431001" }
],
multi: true
};
try {
const updateResult = await dbo.collection("collection").update(query, update, options);
} catch (err) {
console.error(err);
}
db.close();
})();
});
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