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Mongo $addToSet an Array


Mongo $addToSet an Array

By : abtrakt
Date : October 23 2020, 08:10 PM
help you fix your problem I have a working query: , try doing this,
code :
$offenses = \App\LawCase::raw(function ($collection)  {
                return $collection->aggregate([
                    [
                        '$match' => ['active' => true, 'type' => 'criminal', 'current_offense_literal'=> ['$exists' => true]]
                    ],
                    [
                        '$group' => ['_id' => '$current_offense_category', 'offense_literals' => ['$addToSet' => ['current_offense_literal'=>'$current_offense_literal', 'current_offense_literal_value' =>'$current_offense_literal_value']]]

                    ]
                ]);

            });


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Can you specify a key for $addToSet in Mongo?

Can you specify a key for $addToSet in Mongo?


By : Renan Almeida
Date : March 29 2020, 07:55 AM
This might help you You can qualify your update with a query object that prevents the update if the name is already present in profile_set. In the shell:
code :
db.coll.update(
    {_id: id, 'profile_set.name': {$ne: 'nick'}}, 
    {$push: {profile_set: {'name': 'nick', 'options': 2}}})
Meteor & Mongo: addToSet inserting

Meteor & Mongo: addToSet inserting


By : user3524503
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Do you mean every card has id and image field? I guess so.
You can add nested object to an array fields. Like that
Mongo append to existing key ($addToSet)

Mongo append to existing key ($addToSet)


By : Marcel
Date : March 29 2020, 07:55 AM
I wish did fix the issue. For the sake of completeness, I will add the answer here.
You need to add object to set UsersAndQuestions:
code :
{$addToSet: {UsersAndQuestions: { userID: idToAdd, questionID: questionToAdd } }}
Listing.update({_id: ObjectId(listingToUpdate), 'UsersAndQuestions.userID': idToAdd},
{"$addToSet": {"UsersAndQuestions.$.questionID": questionToAdd}}
, function (err, result) {
    if(result.n === 0){
        //we haven't found document with the userId - idToAdd
        //we need to insert to UsersAndQuestions document with this user
        Listing.update({_id: ObjectId(listingToUpdate)},
            {$addToSet: {UsersAndQuestions: { userID: idToAdd, questionID: questionToAdd } }},
            function(err, res){

            })
    }
})
Mongo AddToSet multiple objects into one array

Mongo AddToSet multiple objects into one array


By : Mutlu Furuncu
Date : March 29 2020, 07:55 AM
This might help you You can try below solutions based on mongo version.
The idea here is to change the dynamic keys into labeled key value structure i.e. change embedded doc info_1 & info_2 into embedded arrays and followed by $unwind & $group.
code :
db.collection.aggregate({
    $addFields: {
        information: {
            $objectToArray: "$information.info_details"
        }
    }
}, {
    $unwind: "$information"
}, {
    $group: {
        _id: {
            question: "$question",
            answer: "$answer",
            user: "$user"
        },
        info: {
            $addToSet: "$information.v"
        }
    }
})
db.collection.aggregate({
    $project: {
        question: 1,
        answer: 1,
        user: 1,
        information: ["$information.info_details.info_1", "$information.info_details.info_2"]
    }
}, {
    $unwind: "$information"
}, {
    $group: {
        _id: {
            question: "$question",
            answer: "$answer",
            user: "$user"
        },
        info: {
            $addToSet: "$information"
        }
    }
})
How to check if Mongo's $addToSet was a duplicate or not

How to check if Mongo's $addToSet was a duplicate or not


By : Darren Starr
Date : March 29 2020, 07:55 AM
Any of those help At least in the shell you can differentiate if the document was modified or not (see nModified).
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