Mongoose query where value is not null

Question

Looking to do the following query   Entrant      find       enterDate   oneMonthAgo       confirmed   true      where  pincode length  gt  0        exec  err entrants - gt    Am I doing the where clause properly  I want to select documents where pincode is not null

User · Answer

total count the documents where the value of the field is not equal to the specified value   async function getRegisterUser         return Login count   role      ne   Super Admin       err  totResUser    gt            if  err                return err                    return totResUser

User · Answer

ne      selects the documents where the value of the field is not equal to   the specified value  This includes documents that do not contain the   field    User find    username       ne    admin          nin      nin selects the documents where     the field value is not in the specified array or the field does not exist    User find    groups       nin     admin    user

User · Answer

I ended up here and my issue was that I was querying for     not   email    domain com      instead of    email    not    domain com

User · Answer

You should be able to do this like  as you re using the query api    Entrant where  pincode   ne null        which will result in a mongo query resembling   entrants find   pincode     ne  null        A few links that might help    The mongoose query api The docs for mongo query operators

User · Answer

Hello guys I am stucked with this  I ve a Document Profile who has a reference to User and I ve tried to list the profiles where user ref is not null  because I already filtered by rol during the population   but after googleing a few hours I cannot figure out how to get this  I have this query      const profiles   await Profile find   user    exists  true    ne  null                                  select  -gallery                                sort    id  -1                                 skip  skip                                limit 10                               select exclude                               populate                                   path   user                                   match    role    eq  customer                                    select   -password -verified - id -  v                                                                 exec     And I get this result  how can I remove from the results the user null colletions    I meant  I dont want to get the profile when user is null  the role does not match          code   200       profiles                            description   null               province    West Midlands                country    UK                postal code    83000                user   null                                   description   null                province    Madrid                country    Spain                postal code    43000                user                      role    customer                    name    pedrita                    email    myemail gmail com                    created at    2020-06-05T11 05 36 450Z                                      page   1      Thanks in advance

User · Answer

Ok guys I found a possible solution to this problem  I realized that joins do not exists in Mongo  that s why first you need to query the user s ids with the role you like  and after that do another query to the profiles document  something like this       const exclude  string    - id -created at -gallery -wallet -MaxRequestersPerBooking -active -  v         Get the  ids of users with the role equal to role      await User find  role  role     id  1  role  1  name  1    function err  docs                Map the docs into an array of just the  ids         var ids   docs map function doc    return doc  id                  Get the profiles whose users are in that set          Profile find  user    in  ids    function err  profiles                   docs contains your answer             res json                   code  200                  profiles  profiles                  page  page                                    select exclude           populate               path   user               select   -password -verified - id -  v                 group    role    role

[mongodb] Mongoose query where value is not null

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