How do I limit the number of returned items

Question

myModel find     function err  items        console log items length         Big number       How can I limit  the returned items to only the latest 10 items that were inserted

User · Answer

models Post find  published  true    sort    date   -1   limit  20   function err  posts         posts  with sorted length of 20

User · Answer

In the latest mongoose  3 8 1 at the time of writing   you do two things differently   1  you have to pass single argument to sort    which must be an array of constraints or just one constraint  and  2  execFind   is gone  and replaced with exec   instead  Therefore  with the mongoose 3 8 1 you d do this   var q   models Post find  published  true   sort   date   -1   limit 20   q exec function err  posts             posts  will be of length 20       or you can chain it together simply like that   models Post    find  published  true      sort   date   -1      limit 20     exec function err  posts               posts  will be of length 20

User · Answer

Find parameters  The parameters find function takes are as follows    conditions   Object     projection    Object String   optional fields to return  see Query prototype select    options    Object   optional see Query prototype setOptions    callback    Function     How to limit  const Post   require    models Post     Post find      published  true       null       sort     date    asc     limit  20      function error  posts       if  error  return    error  while finding from post collection       return posts     posts with sorted length of 20          Extra Info  Mongoose allows you to query your collections in different ways like  Official Documentation     named john and at least 18 MyModel find   name   john   age     gte  18          executes  passing results to callback MyModel find   name   john   age     gte  18     function  err  docs           executes  name LIKE john and only selecting the  name  and  friends  fields MyModel find   name   john i     name friends   function  err  docs           passing options MyModel find   name   john i    null    skip  10        passing options and executes MyModel find   name   john i    null    skip  10    function  err  docs           executing a query explicitly var query   MyModel find   name   john i    null    skip  10    query exec function  err  docs           using the promise returned from executing a query var query   MyModel find   name   john i    null    skip  10     var promise   query exec    promise addBack function  err  docs

User · Answer

Like this  using  limit     var q   models Post find  published  true   sort  date   -1  limit 20   q execFind function err  posts          posts  will be of length 20

User · Answer

additionally make sure to use   mongoose Promise   Promise    This sets the mongoose promise to the native ES6 promise  Without this addition I got       DeprecationWarning  Mongoose  mpromise  mongoose s default promise library  is deprecated  plug in your own promise library instead  http   mongoosejs com docs promises html

User · Answer

I am a bit lazy  so I like simple things   let users   await Users find     null   limit  50

User · Answer

For some reason I could not get this to work with the proposed answers  but I found another variation  using select  that worked for me   models Post find   sort  -date   limit 10  select  published   exec function e  data                     Has the api perhaps changed  I am using version 3 8 19

[mongoose] How do I limit the number of returned items?

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