I have document structure like:
{
"date": "2017-02-28T13:06:05Z",
"id": "370adb62d5b1461ead2c4d9410710482",
"json": {
"flag": true,
"key": "abc",
"no":{
"no1":"one",
"no2":"two"
}
}
}
I want to retrive documents where key equals "abc" and no1 equals "one"
Please help !
this should do the trick :
db.collection.find({"json.key": "abc", "json.no.no1": "one"})
try it online: mongoplayground.net/p/XelDmKBa6JS
Related
I’ve been trying to update the data in my mongoDB.
I want to update all products with a new productName field.
my data looks something like:
{
"id": "12345",
"products": [{
"id": 0
"productCode": "test",
"status": "PENDING",
},
{
"id": 1
"productCode": "test",
"status": "COMPLETE",
}],
}
When I try the following. I get this error The positional operator did not find the match needed from the query.
db.customers.updateMany(
{ id: "12345" },
{ $set: {
"products.$.productName": "Name here" }
}
)
If I do account.0.productName then it’s fine and updates. I’m not sure why $ is not working for me
db.customers.updateMany(
{ id: "12345" },
{ $set: {
"products.0.productName": "Name here" }
}
)
Positional operator is not working because you are not using the array into the find (first object)
If you try this query it will work as expected because you have the position finding by products.id.
Otherwise, if you don't have the position into array where update, yo can't use $ operator in this way. You need this query:
db.collection.update({
"id": "12345",
},
{
"$set": {
"products.$[].newField": "test2"
}
},
{
"multi": true
})
Mongo playground example here
Using $[] you can reference the array and add the value into each object.
$[] docs here
It says:
The all positional operator $[] indicates that the update operator should modify all elements in the specified array field.
That's exactly we want :)
I have got a collection of documents and each documents contains a nested array of objects.
{
"id": "309324739",
"debters": [
{
"user": {
"name": "John Doe",
"internal": true
},
"debt": 1463,
},
{
"user": {
"name": "Alex Tree",
"internal": false
},
"debt": 53443,
},
}
What I'm trying to do is to return find the document by id and then find inside the debters list that has a false flag?
I tried the following query...
Debters findByIdAndDebters_User_InternalIsFalse(#Param("id") String id,);
But I'm getting an error saying that it can find "internal" property. What am I doing wrong and how can I loop through array using this magic mongo repository query?
you need to write a native query for that which is similar to
#Query("{'debters.user.internal':false,'_id':''}")
Debters findByIdAndDebtersUserInternalIsFalse(#Param("id") String id,);
i have a person document, that have list of pets:
{
"personId": "kjadfh97r0",
"pets": [
{
"petId": "dfjkh32476",
"name": "kitty",
"kind": "cat"
},
{
"petId": "askdjfh2794857",
"name": "rexy",
"kind": "dog"
}
]
}
I want to find certain pen inside of certain person and update just some fields, so I did something like:
db.people.findAndModify({
query: { "personId": "kjadfh97r0", "pets.petId": "dfjkh32476" },
update: {"$set":{"pets.$":{"kind":"tiger"}}}
})
but what happens to me is that the whole document is replaced with "kind":"tiger", and I just wanted to update the "kind" field any keep the rest.
You should specify entire path for $set when you update nested document using positional operator, otherwise the document will be replaced:
db.people.findAndModify({
query: { "personId": "kjadfh97r0", "pets.petId": "dfjkh32476" },
update: { $set: {"pets.$.kind": "tiger"} }
})
I have a nested JSON document like:
{
"docId": 1901603742,
"sl": [ {"slid","val"}],
"accounts": {
"123": {
"smartAccountId": "123",
"smartAccountName": "Dummy name",
"101": {
"virtualAccountId": "101",
"virtualAccountName": "DEFAULT"
},
"102": {
"virtualAccountId": "102",
"virtualAccountName": "DEFAULT"
}
},
"234": {
"smartAccountId": "234",
"smartAccountName": "Dummy name",
"201": {
"virtualAccountId": "201",
"virtualAccountName": "DEFAULT"
}
}
}
}
here I need to put an Index on the "smartAccountId" and "virtualAccountId". The problem is the key for the nested document is not fixed, its the "smartAccountId" or "virtualAccountId" we are using as the key (123 in the example), how can we get such a document indexed on MongoDB?
Thanks
PS: I already have an array in the original document, so cant introduce one more array, as we wont be able to index more than one array in a given document.
I have this object and I'd like to update the name field "field" of all the document in the collections. I read the mongodb documentation and it says $rename doesn't work in this case. I should execute a forEach but I don't know how which command use
{
"name": "foo"
"array": [
"object": {
"field": "name"
}
]
}
Do it manually:
db.collection.find().forEach(function(doc) {
if (doc.array) {
doc.array.forEach(function(edoc) {
if (edoc.object) {
doc.object.new_field = edoc.object.field
delete edoc.object.field
}
})
db.test.update({ "_id" : doc._id }, doc)
}
})
This should get you started. It handles missing or empty array arrays, but not an array value of the wrong type, or an object value of the wrong type.
$rename modifier for update Ops should work (http://docs.mongodb.org/manual/reference/operator/update/rename/)
Imagine a collection like yours:
{
"name": "foo",
"array":[
{"field": "name" }
]
}
You will be able to do something like this:
db.rename.update({},{$rename:{"name":"newName"}});
And the document will be as follows:
{
"newName": "foo",
"array":[
{"field": "name" }
]
}
In order to update all the collection you should use the multi option as follows:
db.rename.update({},{$rename:{"name":"newName"}}, {multi:true})
Regards