Write a service usingnodeto provide an interface for the caller to encapsulate the parameters after passing in the parameters, andinserta record inmongo, now it is found that some fields cannot be updated. The code is similar to the following

const db = mongodb.collection('collection_name'); let data = { a: 'value1', b: 'value2', c: 'value3' }; db.insert(data);

For example, theaandbfields indatacan be updated successfully, but thecfield is not inserted. At first I thought it was because themongodbpackage used was out of date. Now I have updated to the latest version2.2.26and the version still cannot be updated. Later, thefindOneAndUpdatecommand was used instead, and the updated document was returned. The returned result had acvalue, but there was still nocfield inmongovalue. Ask God for answers! ! !