node.js - $unset is empty. You must specify a field like so: {$unset: {<field>: ...}} -

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mongodb version 3.0.1
mongoose version 4.0.3

i'm trying this:

groupsmodel.updateq({_id:group._id},{     $unset:{"moderators":""},     $set:{"admins":newadmins} })

and i'm getting mongoerror catch stating

'\'$unset\' empty. must specify field so: {$unset: {<field>: ...}}'

but isn't empty.

moderators, however, isn't in schema, why i'm trying remove it.

i wasn't able reproduce error message, you've seen, mongoose update fields defined in schema. however, can override default behavior including strict: false option:

groupsmodel.update(     {_id: group._id},     {$unset: {"moderators": ""}, $set:{"admins": newadmins}},     {strict: false} )

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