inbound

A primary key is considered inbound if it's included in the stored objects.

Examples of inbound primary key

db.version(1).stores({
    friends: "id"
});

db.version(1).stores({
    friends: "id,name"
});

db.version(1).stores({
    friends: "++id,name"
});

Example of non-inbound primary key

db.version(1).stores({
    friends: ""
});

db.version(1).stores({
    friends: ",name"
});

db.version(1).stores({
    friends: "++,name"
});