MongoDB rename database field within array

Question

I need to rename indentifier in this:

{ "general" : 
  { "files" : 
    { "file" : 
      [  
        {  "version" : 
          {  "software_program" : "MonkeyPlus",      
             "indentifier" : "6.0.0" 
          } 
        } 
      ] 
    } 
  } 
}

I've tried

db.nrel.component.update(
  {},
  { $rename: {
    "general.files.file.$.version.indentifier" : "general.files.file.$.version.identifier"
  } },
  false, true
)

but it returns: $rename source may not be dynamic array.

Answer 1

As mentioned in the documentation there is no way to directly rename fields within arrays with a single command. Your only option is to iterate over your collection documents, read them and update each with $unset old/$set new operations.