mongocxx c++11 master driver document update

[Evan]

How can I update a document using the "_id" field? I can do it using another field, but not the "_id". I understand this field is an ObjectId, but how do I create a filter for it? Some code is below. Thanks for any help!

    mongocxx::instance inst{};
    mongocxx::client conn{};
    auto db = conn["todos"];

    builder::stream::document filter;
    builder::stream::document update;

    //bsoncxx::oid myoid("55f32a05c330964d296e6a11");

    //THIS WORKS USING THE CATCHUP FIELD
    filter << "catchup" << false;
    // THIS DOES NOT WORK
    //filter << "_id" << "55f32a05c330964d296e6a11";
    // THIS DOES NOT WORK
    //filter << "_id" << myoid;

    update << "$set" << bsoncxx::builder::stream::open_document
            << "minhand" << 44 << bsoncxx::builder::stream::close_document;

    db["clockdials"].update_one(filter, update);

[Evan]

I figured it out. You have to use the bsoncxx::v0::oid not the bsoncxx::oid

//This does not work

//bsoncxx::oid myoid("55f32a05c330964d296e6a11");

//This works

bsoncxx::v0::oid myoid("55f32a05c330964d296e6a11");

filter << "_id" << myoid;

[Andrew Morrow]

That really shouldn't be necessary. The 'v0' you are naming there is an inline namespace intended to manage ABI compatibility. You should never need to explicitly mention it.

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