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Find documents where all elements of an array have a specific value in MongoDB?
You can use find() for this. Let us first create a collection with documents −
> db.findDocumentsDemo.insertOne(
{
_id: 101,
"ProductDetails": [
{ "ProductValue":100 },
{ "ProductValue":120 }
]
}
);
{ "acknowledged" : true, "insertedId" : 101 }
> db.findDocumentsDemo.insertOne(
{
_id: 102,
"ProductDetails": [
{ "ProductValue":120},
{ "ProductValue":120 },
{ "ProductValue":120 }
]
}
);
{ "acknowledged" : true, "insertedId" : 102 }Following is the query to display all documents from a collection with the help of find() method −
> db.findDocumentsDemo.find().pretty();
This will produce the following output −
{
"_id" : 101,
"ProductDetails" : [
{
"ProductValue" : 100
},
{
"ProductValue" : 120
}
]
}
{
"_id" : 102,
"ProductDetails" : [
{
"ProductValue" : 120
},
{
"ProductValue" : 120
},
{
"ProductValue" : 120
}
]
}Following is the query to find documents where all elements of an array have a specific value i.e. ProductValue 120 here −
> db.findDocumentsDemo.find({
"ProductDetails.ProductValue" : {
},
"ProductDetails" : {
$not : {
$elemMatch : {
"ProductValue" : {
$ne : 120
}
}
}
}
});This will produce the following output −
{ "_id" : 102, "ProductDetails" : [ { "ProductValue" : 120 }, { "ProductValue" : 120 }, { "ProductValue" : 120 } ] }
Updated on: 30-Jul-2019
78 Views
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