Mongoose update values in array of objects

Question

Is there a way to update values in an object        id  1    name   John Smith     items          id  1       name   item 1        value   one             id  2       name   item 2        value   two           Lets say I want to update the name and value items for item where id   2   I have tried the following w  mongoose   var update    name   updated item2   value   two updated    Person update   items id   2      set      items     update    function err          Problem with this approach is that it updates sets the entire object  therefore in this case I lose the id field   Is there a better way in mongoose to set certain values in an array but leave other values alone   I have also queried for just the Person   Person find        function err  person      person items          I might be able to search through all the items here and find item with id 2 then update the values I want and call person save

User · Answer

In Mongoose  we can update array value using  set inside dot    notation to specific value in following way   db collection update    id   args  id   viewData  id   widgetId     set    viewData   widgetData   widgetDoc widgetData

User · Answer

For each document  the update operator  set can set multiple values  so rather than replacing the entire object in the items array  you can set the name and value fields of the object individually      set      items   name   update name    items   value   update value

User · Answer

There is a mongoose way for doing it   const itemId   2  const query       item  id  itemId     Person findOne query  then doc   gt      item   doc items id itemId      item  name      new name     item  value      new value     doc save         sent respnse to client    catch err   gt      console log  Oh  Dark

User · Answer

Below is an example of how to update the value in the array of objects more dynamically  Person findOneAndUpdate   id  id          quot  set quot      items   outer    propertyName     value            quot arrayFilters quot       quot outer id quot   itemId       function err  response              Note that by doing it that way  you would be able to update even deeper levels of the nested array by adding additional arrayFilters and positional operator like so   quot  set quot      items   outer  innerItems   inner    propertyName     value     quot arrayFilters quot      quot outer id quot   itemId      quot inner id quot   innerItemId      More usage can be found in the official docs

User · Answer

There is one thing to remember  when you are searching the object in array on the basis of more than one condition then use  elemMatch  Person update             id  5       grades     elemMatch    grade     lte  90    mean     gt  80                   set     grades   std    6         here is the docs

User · Answer

I had similar issues  Here is the cleanest way to do it      const personQuery             id  1              const itemID   2       Person findOne personQuery  then item   gt           const audioIndex   item items map item   gt  item id  indexOf itemID          item items audioIndex  name    Name value          item save

User · Answer

Having tried other solutions which worked fine  but the pitfall of their answers is that only fields already existing would update adding upsert to it would do nothing  so I came up with this    Person update   items id   2     set         items      item1     item2     item3     item4        upsert   true

User · Answer

You re close  you should use dot notation in your use of the   update operator to do that   Person update   items id   2      set          items   name    updated item2        items   value    two updated      function err

User · Answer

update        id  1   items id   2          set     items       update         new  true     Here is the doc about      https   docs mongodb com manual reference operator update positional-all  up S

User · Answer

model update    id   1   items id    2       set    items   name    yourValue   items   value    yourvalue       Mongodb document

User · Answer

In mongoose we can update  like simple array  user updateInfoByIndex 0  test    User methods updateInfoByIndex   function index  info         this arrayField index  info     this save

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