Mongoose + Lodash Extend Copying Array Of Object Incorrectly

I have this schema var CandidateProfileSchema = new Schema({ OtherExp: [{ typeExp:String, organization: String, startDate: String, endDate: String, role: Str

Solution 1:

I've just wasted 1 hour on similar issue. I've used _.assign{In}(), then _.merge() then tried also Document#set() i've always ended with repeated entries in array.

The workaround that works for me

• assign [] to any array that is about to be set
• then assign whole tree using doc.set(attrs)

Example (in my case, some_problematic_array caused same strange behaviuour as in question):

var attrs = _.pick(req.body, [
    'name',
    'tags', // ..."some_problematic_array"
]);
var doc = ///... ;if( attrs.some_problematic_array ) doc.some_problematic_array = [];
                                      ^^^^ ***workaround***
doc.set(attrs);

Solution 2:

I think this might be a typo: if you want to update OtherExp in your candidateProfile, it should be something like this

candidateProfile.OtherExp = _.extend(candidateProfile.OtherExp, req.body.OtherExp);`
candidateProfile.save(//... etc)

Solution 3:

Mongoose models with nested enumerables mess up with lodash merge or extend.

Try first aggregating your data before assigning.

vardata = _.merge(candidateProfile.toJSON(), req.body);
candidateProfile.other = _.extend(candidateProfile.other, data.other);