Move file asynchronously

[imlyc]

Hi,

I'm using mongoose-file in my project where I need to upload an image for a user and return the link to the image after the image meta data is stored in the db. I find the setter for "pathname.file" works asynchronously if "upload_to" is set, because "mkdirp" and "rename" are called asynchronousely. As a result, the meta data maybe all null after the assignment. Do you have any good idea to avoid the null meta data? (Meta data is the json object represent the file in the plugin).

Thanks very much and I appreciate your help.

Yuchen