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If I have a document with the following basic structure:
{
...
Monday: { a:1, b:2 },
Tuesday: { c:3, d:4 }
...
}
Am I able to 'push' an additional key:value pair to Monday's value? Result would be:
{
Monday: { a:1, b:2, z:8 },
Tuesday: { c:3, d:4 }
...
}
The $push operator seems to only work for arrays.
331
A key-value database is a type of nonrelational database that uses a simple key-value method to store data. A key-value database stores data as a collection of key-value pairs in which a key serves as a unique identifier. Both keys and values can be anything, ranging from simple objects to complex compound objects.
A key-value pair consists of two related data elements: A key, which is a constant that defines the data set (e.g., gender, color, price), and a value, which is a variable that belongs to the set (e.g., male/female, green, 100). Fully formed, a key-value pair could look like these: gender = male. color = green.
Learn more about MongoDB Atlas. Key value databases, also known as key value stores, are database types where data is stored in a “key-value” format and optimized for reading and writing that data. The data is fetched by a unique key or a number of unique keys to retrieve the associated value with each key.
The dictionary stores objects as key-value pairs and can be used to represent complex real-world data.
Just do something like that
db.foo.update({"_id" :ObjectId("...") },{$set : {"Monday.z":8}})
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