如果存在数组元素，则从mongodb集合中检索项目（meteor js）

I would like to retrieve elements from a collection only if an element in an array is equal to the current month that I have stored in a session. For example, if my session variable is equal to "juillet" I would like to have only the items which have "juillet" in the "moisrec" method :I would like to retrieve elements from a collec