How to insert a Boost ptree into MongoDB using C++

Question

I have MongoDB C++ Driver at https://mongodb.github.io/mongo-cxx-driver/mongocxx-v3/tutorial/ compiled and ready, tested OK with literal data.

But the challenge is how to store a Boost ptree into MongoDB as a document. I have a Boost ptree because I'm using Boost to parse JSON string.

The process is as following:

Input --> JSON String (OK) --> Boost ptree (OK) --> MongoDB insert (stuck!)

Answer 1

Got a solution finally!

These are the steps:

• ptree can be obtained from parsing JSON string (Boost read_json)
• Check or modify values in ptree object
• Convert the ptree back to JSON string using Boost write_json
• Convert to MongoDB BSON value: bsoncxx::document::value Doc = bsoncxx::from_json(Str)
• Insert to DB: cxxClient["dbname"]["collection"].insert_one(Doc.view());