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how to use mongoose aggregate

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Bad Bird answered on November 10, 2020 Popularity 10/10 Helpfulness 1/10

answer how to use mongoose aggregate

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-2

const agg = Model.aggregate([{ $match: { age: { $gte: 25 } } }]);
for await (const doc of agg) {
  console.log(doc.name);
}

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Source: mongoosejs.com

Tags: aggregate mongoose whatever

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Contributed on Nov 10 2020

Bad Bird

0 Answers Avg Quality 2/10

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aggregate in mongoose express node.js

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//routes/tourRouter.js
router.route('/tour-stats').get(tourController.getTourStats);

//controller/tourController.js
//NOTES::Aggregation pipeline to get tours stats
exports.getTourStats = async (req, res) => {
  try {
    const stats = await Tour.aggregate([
      {
        $match: { ratingsAverage: { $gte: 4.5 } },
      },
      {
        $group: {
          _id: { $toUpper: '$difficulty' },
          num: { $sum: 1 },
          numRatings: { $sum: '$ratingsQuantity' },
          avgRating: { $avg: '$ratingsAverage' },
          avgPrice: { $avg: '$price' },
          minPrice: { $min: '$price' },
          maxPrice: { $max: '$price' },
        },
      },
      {
        $sort: { avgPrice: 1 },
      },
      // { $match: { _id: { $ne: 'EASY' } } },
    ]);

    res.status(200).json({
      status: 'sucess',
      results: stats.length,
      data: stats,
    });
  } catch (error) {
    console.log(error);
    res.status(404).json({
      status: 'fail',
      message: error,
    });
  }
};

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Source: Grepper

Tags: aggregate aggr

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Contributed on Oct 16 2022

Shirshak Kandel

0 Answers Avg Quality 2/10

mongoose aggregate

Comment

const aggregate = Model.aggregate([
  { $project: { a: 1, b: 1 } },
  { $skip: 5 }
]);

Model.
  aggregate([{ $match: { age: { $gte: 21 }}}]).
  unwind('tags').
  exec(callback);

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Source: mongoosejs.com

Tags: aggregate aggr

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Contributed on Apr 06 2021

Krushn

0 Answers Avg Quality 2/10

and in mongoose aggregate

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var followers_count = 30;
db.locations.find({
   "$expr": { 
       "$and": [
           { "$eq": ["$name", "development"] },
           { "$gte": [{ "$size": "$followers" }, followers_count ]}
       ]
    }
});

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Source: stackoverflow.com

Tags: aggregate aggr

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Contributed on Nov 30 2022

Ahm1027

0 Answers Avg Quality 2/10

aggregate mongoose example

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let videos= await Beg.aggregate([
        {
          $project: { // allows you to select or unselect filed.
            _id: 1,//_id: 1 will select the field and _id: 0 will unselect field 
          },
        },
        {
          $lookup: {
            from: "videos", //the sub table or document
            localField: "_id", // filed name of main table or doc
            foreignField: "begId", // filed name of sub table or doc
            as: "videos", // name your object
          },
        },
      ]);

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Tags: aggregate aggr

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Contributed on Jan 27 2023

Dhaval Italiya

0 Answers Avg Quality 2/10

how to use mongoose aggregate

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