How to remove array element in mongodb

Question

Here is array structure  contact        phone                          number    1786543589455               place   New Jersey               createdAt                                     number    1986543589455               place   Houston               createdAt                          Here I only know the mongo id  id  and phone number  1786543589455  and I need to remove that whole corresponding array element from document  i e zero indexed element in phone array is matched with phone number and need to remove the corresponding array element   contact        phone                          number    1986543589455               place   Houston               createdAt                         I tried with following update method  collection update         id  id   contact phone     1786543589455            unset     contact phone   number     1786543589455          But it removes  number    1786543589455 from inner array object  not zero indexed element in phone array  Tried with pull also without a success   How to remove the array element in mongodb

User · Answer

If you use the Mongoose API and looking to pull a sub child object  Read this document Don t forget to use save   when you re done editing otherwise the changes won t be saved to the database

User · Answer

You can simply use  pull to remove a sub-document  The  pull operator removes from an existing array all instances of a value or values that match a specified condition   Collection update        id  parentDocumentId             pull          subDocument             id  SubDocumentId                       This will find your parent document against given ID and then will remove the element from subDocument which matched the given criteria   Read more about pull here

User · Answer

In Mongoose  from the document      To remove a document from a subdocument array we may pass an object   with a matching  id    contact phone pull    id  itemId       remove contact phone pull itemId      this also works   See Leonid Beschastny s answer for the correct answer

User · Answer

To remove all array elements irrespective of any given id  use this  collection update              pull     contact phone     number    1786543589455

User · Answer

Try the following query   collection update       id  id         pull     contact phone     number    1786543589455             It will find document with the given  id and remove the phone  1786543589455 from its contact phone array   You can use  unset to unset the value in the array  set it to null   but not to remove it completely

User · Answer

This below code will remove the complete object element from the array  where the phone number is   1786543589455   db collection update       id  id         pull     contact     number    1786543589455

[mongodb] How to remove array element in mongodb?

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