I'm new MongoDB. I have a collection is named "surveyCollection". I insert some data to collection with shell,
db.surveyCollection.insert({
"count":30,
"people": [
{
"firstName":"John",
"lastName":"Jason"
}
]
})
db.surveyCollection.insert({
"count":30,
"people": [
{
"firstName":"Sarah",
"lastName":"Smith"
}
]
})
And I have data below ( db.surveyCollection.find().pretty());
{
"_id" : ObjectId("5873d0c86c3319a579754d00"),
"count" : 30,
"people" : [
{
"firstName" : "John",
"lastName" : "Jason"
}
]
}
{
"_id" : ObjectId("5873d0c86c3319a579754d00"),
"count" : 30,
"people" : [
{
"firstName" : "Sarah",
"lastName" : "Smith"
}
]
}
I don't know how can I insert a new people to any survey. I mean, I want to have datas like below;
{
"_id" : ObjectId("5873d0c86c3319a579754d00"),
"count" : 30,
"people" : [
{
"firstName" : "John",
"lastName" : "Jason"
}
]
}
{
"_id" : ObjectId("5873d0c86c3319a579754d00"),
"count" : 30,
"people" : [
{
"firstName" : "Sarah",
"lastName" : "Smith"
},
{
"firstName" : "George",
"lastName" : "Smith"
}
]
}
I mean, how can I reach values in JsonArray?
Thank you
Use $push method to push an item into array of a document as shown below :
db.surveyCollection.update(
{ "_id" : ObjectId("5873d0c86c3319a579754d00") },
{ $push: { people: { "firstName" : "George", "lastName" : "Smith"} } }
)
This will add the object { "firstName" : "George", "lastName" : "Smith"} to the array people in the document of {"_id" : ObjectId("5873d0c86c3319a579754d00")}