I met a problem , when i insert document into mongodb with nodejs,the result is not
correct.Because the document contains the symbol of $,it conflict with mongodb's origin
operator $.
Can anybody help to solve this problem.Thank you!!!
See here for restrictions in key names in MongoDB documents:
"The '$' character must not be the first character in the key name."
Other locations of $ character are fine, either in a key name or field value (if it's a string).