Properly close mongoose s connection once you re done

Question

I m using mongoose in a script that is not meant to run continuously  and I m facing what seems to be a very simple issue yet I can t find an answer  simply put once I make a call to any mongoose function that sends requests to mongodb my nodejs instance never stops and I have to kill it manually with  say  Ctrl c or Program exit     The code looks roughly like this   var mongoose   require  mongoose        if my program ends after this line  it shuts down as expected  my guess is that the connection is not really done here but only on the first real request   mongoose connect  mongodb   localhost 27017 somedb         define some models     if I include this line for example  node never stop afterwards var MyModel    mongoose model  MyModel   MySchema     I tried adding calls to mongoose disconnect   but no to result  Aside from that  everything works fine  finding  saving         This is the exact same issue as this person  sadly he did not receive any answer  https   groups google com group mongoose-orm browse thread thread c72cc1c51c76e661  Thanks  EDIT  accepted the answer below as it is technically correct  but if anyone ever hit this problem again  it seems that mongoose and or the mongodb driver does not actually close the connection when you ask it to if there are still queries running   It does not even remember the disconnect call at all  it does not do it once queries are finished running  it just discards your call with no exception thrown or anything of the sort  and never actually close the connection   So there you have it  make sure that every query has been processed before calling disconnect   if you want it to actually work

User · Answer

I m using version 4 4 2 and none of the other answers worked for me  But adding useMongoClient to the options and putting it into a variable that you call close on seemed to work    var db   mongoose connect  mongodb   localhost 27017 somedb     useMongoClient  true       do stuff  db close

User · Answer

The other answer didn t work for me  I had to use mongoose disconnect    as stated in this answer

User · Answer

Probably you have this   const db   mongoose connect  mongodb   localhost 27017 db        Do some stuff  db disconnect      but you can also have something like this   mongoose connect  mongodb   localhost 27017 db     const model   mongoose model  Model   ModelSchema    model find   then doc   gt      console log doc       you cannot call db disconnect   but you can close the connection after you use it   model find   then doc   gt      console log doc      then      gt      mongoose connection close

User · Answer

Just as Jake Wilson said  You can set the connection to a variable then disconnect it when you are done   let db  mongoose connect  mongodb   localhost 27017 somedb   then  dbConnection   gt       db   dbConnection      afterwards          function afterwards           do stuff      db disconnect        or if inside Async function    async     gt       const db   await mongoose connect  mongodb   localhost 27017 somedb     useMongoClient                     true           do stuff      db disconnect        otherwise when i was checking it in my environment it has an error

User · Answer

You will get an error if you try to close disconnect outside of the method  The best solution is to close the connection in both callbacks in the method  The dummy code is here   const newTodo   new Todo  text  cook dinner      newTodo save   then  docs    gt      console log  todo saved  docs     mongoose connection close       e    gt      console log  unable to save

User · Answer

You can set the connection to a variable then disconnect it when you are done   var db   mongoose connect  mongodb   localhost 27017 somedb        Do some stuff  db disconnect

User · Answer

You can close the connection with  mongoose connection close

[node.js] Properly close mongoose's connection once you're done

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