Mongoose Get full list of users

Question

I have tried to use Mongoose to send the list of all users as follows   server get   usersList   function req  res        var users            User find     function  err  user            users user  id    user               res send users         Of course  res send users   is going to send     which is not what I want  Is there a find alternative with slightly different semantics  where I could do the following   server get   usersList   function req  res            User find     function  err  users            res send users                 Essentially  I want the callback to be executed only when all the users have been fetched from the database

User · Answer

If you d like to send the data to a view pass the following in        server get   usersList   function req  res            User find     function err  users               res render   usersList    users  users                          Inside your view you can loop through the data using the variable users

User · Answer

In case we want to list all documents in Mongoose collection after update or delete  We can edit the function to some thing like this   exports product update   function  req  res  next            Product findByIdAndUpdate req params id    set  req body   function  err  product                if  err  return next err               Product find     then function  products                    res send products                                     res send  Product udpated                          This will list all documents on success instead of just showing success message

User · Answer

you can also do it by async function to get all the users await User find     err users   gt        if  err       return  res status 422  send err             if   users           return res status 422  send  error  quot No data in the collection quot               res send  Allusers users

User · Answer

There was the very easy way to list your data    server get   userlist    function  req   res     User find     then function  users     res send users

User · Answer

Same can be done with async await and arrow function  server get   usersList   async  req  res    gt     const users   await User find       const userMap       users forEach  user    gt        userMap user  id    user       res send userMap

User · Answer

To make function to wait for list to be fetched   getArrayOfData         return DataModel find     then function  storedDataArray            return storedDataArray         catch function err           if  err                throw new Error err message

User · Answer

My Solution  User find            exec            then users   gt                const response                     count  users length                  users  users map user   gt                         return                            id  user  id                             other property                                                                       res status 200  json response              catch err   gt            console log err           res status 500  json               success  false

User · Answer

Well  if you really want to return a mapping from  id to user  you could always do   server get   usersList   function req  res      User find     function err  users        var userMap            users forEach function user          userMap user  id    user               res send userMap                 find   returns all matching documents in an array  so your last code snipped sends that array to the client

User · Answer

This is just an Improvement of  soulcheck  s answer  and fix of the typo in forEach  missing closing bracket        server get   usersList    req  res    gt           User find      err  users    gt               res send users reduce  userMap  item    gt                    userMap item id    item                 return userMap                                          cheers

[javascript] Mongoose: Get full list of users

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