在MongoDB的嵌套数组中将日期转换为字符串 [英] Convert Date to String in nested array in mongodb
问题描述
我有一个名为case的mongodb集合,在内部案例中,每个公司对象都有一系列案例.
I have a mongodb collection called cases and inside cases I have an array of cases per company object.
所以结构是:
在每种情况下,我想使用createddate(它是一个字符串)和endDate(也是字符串)并将其转换为mongodb日期.
Inside each case I want to use the createddate (which is a string) and endDate (also string) and convert it to a mongodb date.
当我使用NoSQLBooster时,添加以下查询:
When I use NoSQLBooster I add the following query:
db.cases.aggregate([
{ $match: { companyID: 218 }},
{ $unwind: "$cases" },
{ $match: { 'cases.id': '299' }},
{ $addFields: { 'cases.created': new Date('2010-06-21T00:00:00.000'), 'cases.closed': new Date('2014-08-29T00:00:00.000') }},
{ $group: { _id: "$_id", cases: { $push: "$cases" }}}])
这将在新字段中添加日期-创建并关闭.这正是我想要的.
This will add a date in a new field - created and then closed. This is exactly what I want.
但是,在我的代码(使用猫鼬)中,我有以下内容:
However, in my code (using mongoose) I have the following:
scripts.commponent.ts:
runThroughCasesAndConvertDates(id) {
this.scriptsService.getAllCasesToModify({ companyID : id}).subscribe( res => {
if (res.length > 0) {
for (let i = 0; i < res[0].cases.length; i++) {
const caseID = res[0].cases[i].id;
const data = {
companyID: id,
caseID: caseID,
created: moment(res[0].cases[i].createddate, 'DD-MMM-YYYY h:mm a').format('YYYY-MM-DD[T00:00:00.000Z]'),
closed: ''
};
if (res[0].cases[i].endDate !== '') {
data.closed = moment(res[0].cases[i].endDate, 'DD-MMM-YYYY h:mm a').format('YYYY-MM-DD[T00:00:00.000Z]');
}
this.scriptsService.updateDates(data).subscribe();
}
}
});
}
scripts.service.ts
updateDates(body) {
return this.http.post('/db/cases/updateAllDates', body).pipe(
map(res => res.json())
);
}
casesDB.js
router.post('/updateAllDates', (req, res) => {
const { body } = req;
Cases.aggregate([
{ $match: { companyID: body.companyID }},
{ $unwind: "$cases" },
{ $match: { 'cases.id': body.caseID }},
{ $addFields: { 'cases.created': new Date(body.created), 'cases.closed': new Date(body.closed) } },
{ $group: { _id: "$_id" }
}],
function (err, data) {
res.json(data)
});
});
但是它不会在数组中添加任何内容.我真的对我做错了什么感到困惑.也许有更好的方法/方法可以做到这一点?
But it does not add anything into the array. Im really confused as to what Im doing wrong. Maybe there is a better way / approach to doing this?
谢谢
推荐答案
You can $map
over the cases
array and can change the date string
fields to date object
fields.
Cases.aggregate([
{ "$addFields": {
"cases": {
"$map": {
"input": "$cases",
"in": {
"$mergeObjects": [
"$$this",
{
"createddate": {
"$dateFromString": { "dateString": "$$this.createddate" }
},
"endDate": {
"$dateFromString": { "dateString": "$$this.endDate" }
}
}
]
}
}
}
}}
])
更新:如果日期为空字符串
Update: If dates are blank string
Cases.aggregate([
{ "$addFields": {
"cases": {
"$map": {
"input": "$cases",
"in": {
"$mergeObjects": [
"$$this",
{
"createddate": {
"$cond": [
{ "$eq": ["$$this.createddate", ""] },
null
{ "$dateFromString": { "dateString": "$$this.createddate" } }
]
},
"endDate": {
"$cond": [
{ "$eq": ["$$this.endDate", ""] },
null
{ "$dateFromString": { "dateString": "$$this.endDate" } }
]
}
}
]
}
}
}
}}
])
这篇关于在MongoDB的嵌套数组中将日期转换为字符串的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!