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Supposing I have a model Post, wich contains only the field desc.
The user can use hashtags, like #rails inside any posts…
How can I list and count the hashtags used, for example, in the last 10 days?
I’m do not know much about mongodb, but I see that I could use something called map_reduce.. have no idea why/how.
Thanks in advance.
You are right…this can be solved using mad/reduce function…
try this or this gem if you dont want to think a lot lol
https://github.com/jcoene/mongoid-mapreduce