Suppose our document looks like this

{
   a:1,
   b:[
    {c:120,d:100},
    {c:121,d:110}
   ]
}

Now how could I upsert new objects in this array? Suppose I want to perform update on the above document and add {c:200,d:120} to b so my expected result looks like this

{
   a:1,
   b:[
    {c:120,d:100},
    {c:121,d:110},
    {c:200,d:120}
   ]
}

Also the update will of $inc, meaning suppose I want to increment d by 200 if c is present(lets say c is 200 and it is already present in the above document), if not present then I want to upsert the document itself.