How to update list of dicts?

[Prasad_Saya]

Hello @Nikita_Bylnov, welcome to the MongoDB Community forum!

You can do this update using the Updates with Aggregation Pipeline feature. Below is similar post with a solution.:

MongoDB 4.2 update pipeline: “Push or Update” in nested array

I want push new object to nested array if object with field ‘Cat’=1 not exists. Or if object with ‘Cat’=1 field exists then increment Up field in this object. I cant write right syntax, help plz Document: { "BlogId" : 1, "Items" : [ { "Cat" : 1, "Up" : 555, }, { "Cat" : 2, "Up" : 666, } ] } Query (with wrong syntax): db.exp.update({ BlogId: 1 }, [ { $set: { "Items.Cat": { $cond: [ { "Items.Cat…