My sample data:
[
{
'user': '[email protected]',
'AddressLine': 'jntgt',
'vat': 'gfgf',
'Companyname': 'gfgfg',
'countryName': 'mexico',
'AddressTitle': 'ev',
},
{
'user': '[email protected]',
'AddressLine': 'gthh',
'vat': 'gfgf',
'Companyname': 'gfgfg',
'countryName': 'usa',
'AddressTitle': 'ev',
},
{
'user': '[email protected]',
'AddressLine': 'gdgg',
'vat': 'gfgf',
'Companyname': 'ljjjhg',
'countryName': 'Angola',
'AddressTitle': 'ev',
},
];
I want the result to look like this:
[
{
'user': '[email protected]',
'addresses': [
{
'AddressLine': 'jntgt',
'vat': 'gfgf',
'Companyname': 'gfgfg',
'countryName': 'mexico',
'AddressTitle': 'ev',
},
{
'AddressLine': 'gthh',
'vat': 'gfgf',
'Companyname': 'gfgfg',
'countryName': 'usa',
'AddressTitle': 'ev',
},
],
},
{
'user': '[email protected]',
'addresses': [
{
'AddressLine': 'gdgg',
'vat': 'gfgf',
'Companyname': 'ljjjhg',
'countryName': 'Angola',
'AddressTitle': 'ev',
},
],
},
]
How should mongodb aggregation code be? I tried this:
[
{
$group: {
_id: '$user',
addresses: { $push: '$$ROOT' },
},
},
{
$project: {
user: '$_id',
addresses: 1,
},
},
];
ok. but The user I grouped in root appears again. how can i remove user when i group.
CodePudding user response：
You can do this in multiple ways, the easiest way IMO is to just add another $project stage at the end that excludes that field, like so:
db.collection.aggregate([
{
$group: {
_id: "$user",
addresses: {
$push: "$$ROOT"
}
},
},
{
$project: {
user: "$_id",
addresses: 1,
}
},
{
$project: {
_id: 0,
"addresses.user": 0
}
}
])