如何在pymongo中使用mongo函数？

Question

I'm looking at mongodb tutorials . I want to make use of some javascript mongodb functions, but I can't see how I can do this with pymongo. I can fire up mongo shell, but this has to be done via pymongo as a part of my wsgi app.

pymongo seems to have Code object - How can I 1)put some Code objects into my db, and 2)use them with pymongo?

Answer 1

Any JavaScript functions you want to run on the server have to be executed with "eval" command .

You can see how to invoke that from Python here .

You can invoke functions you have stored on the server though it's not recommended.

In general, performance of "eval" will be poor and I would recommend implementing in Python anything you were planning on implementing in JS if you are writing a Python application. Here is a question with recent discussion of the comparison: MongoDB performance of db.eval() in javascript shell vs. pymongo