javascript - First Name and Last Name Combine search in mongoDB - Stack Overflow

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I have store two field FirstName and LastName stored in MongoDB.from Frontend, I am receiving a string containing both first name and last name separated by space I need a find query which searches both first name & last name bined.

here is eg. scenario

in DB I have following object

{ firstName: "Hemant Kumar", lastName: "Rajpoot" };

if i receive "Hemant Kumar Rajpoot" it should match.If possible please don't give solution with aggregeation.

I have store two field FirstName and LastName stored in MongoDB.from Frontend, I am receiving a string containing both first name and last name separated by space I need a find query which searches both first name & last name bined.

here is eg. scenario

in DB I have following object

{ firstName: "Hemant Kumar", lastName: "Rajpoot" };

if i receive "Hemant Kumar Rajpoot" it should match.If possible please don't give solution with aggregeation.

• javascript
• node.js
• mongodb
• mongoose
• mongodb-query

Share Improve this question Follow asked Sep 18, 2019 at 7:18 Hemant RajpootHemant Rajpoot 69011 gold badge1212 silver badges2929 bronze badges 1

• This post can be a duplicate of another. Check this one: stackoverflow./questions/15495368/… – medkhelifi Commented Sep 18, 2019 at 7:29

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5 Answers 5

Sorted by: Reset to default 15

You can use $regexMatch if you are using latest mongodb version 4.2

db.collection.find({
  "$expr": {
    "$regexMatch": {
      "input": { "$concat": ["$first", " ", "$last"] },
      "regex": "a",  //Your text search here
      "options": "i"
    }
  }
})

MongoPlayground

You can do it with bination of $expr, $eq and $concat.

Example:

db.yourCollection.find({
  $expr: {
    $eq: [
      {$concat: ["$firstName", " ", "$lastName"]}, 
      "Hemant Kumar Rajpoot" // your full name to search here
    ]
  }
})

If you would like to do it using aggregation. here is an example

db.user.aggregate(
   [
       {
            $project : {
                fullname: {$concat: ["$firstname", " ", "$lastname"]}
            },
        },
        {
            $match : {
                fullname: "your full name"
            }
        }
   ]
)

Searching from Both Two Fields (First Name & Last Name) in MongoDB prioritising the First Names;

Previously, The Search Results Prioritised the Last Names First, since the search was Alphabetical. Now I've Combined the Results for both but vice versa, (The Intuitive Way).

Can It be Solved Better to be more efficient or optimised, Just a newbie asking.

Suggest me a Better Search Function/Algo if you know. (Please)

globalSearch: function (q, id) {
  return new Promise(async (resolve, reject) => {
    q = q.toString();
    q = q.trim();
    var y = q.indexOf(' ') > 0;
    var firstParam, secondParam;
    var searchQuery, searchQuery1, searchQuery2;
    var users = {};
    if (y) {
      q = q.split(" ");
      firstParam = q[0];
      secondParam = q[1];
      searchQuery = {
        is_activated: true,
        "privacy.is_profile_public": true,
        "privacy.block_list": { $ne: id },
        $and: { fname: { "$regex": firstParam, "$options": "i" } }, { lname: { "$regex": secondParam, "$options": "i" } },
      }
      User.find(searchQuery, function (err, users) {
        if (err || !users) {
          return reject({
            status: 404,
            message: "User not found",
          });
        }
        return resolve(users);
      },
      ).sort({ fname: 1 }).collation({ locale: "en", caseLevel: true }).sort({ lname: 1 }).collation({ locale: "en", caseLevel: true });
    }
    else {
      searchQuery1 = {
        is_activated: true,
        "privacy.is_profile_public": true,
        "privacy.block_list": { $ne: id },
        fname: { "$regex": q, "$options": "i" },
      };
      searchQuery2 = {
        is_activated: true,
        "privacy.is_profile_public": true,
        "privacy.block_list": { $ne: id },
        lname: { "$regex": q, "$options": "i" },
      };
      userslist1 = await this.searchCompanion1(searchQuery1);
      userslist2 = await this.searchCompanion2(searchQuery2);
      users = userslist1 + userslist2
      return resolve(users);
    }
  });

},

searchCompanion1: function (Q) {
  return new Promise((resolve, reject) => {
   User.find(Q, function (err, users) {
   if (err || !users) {
        console.log(err);
      }
      return resolve(users);
    },
    ).sort({ fname: 1 }).collation({ locale: "en", caseLevel: true }).sort({ lname: 1 }).collation({ locale: "en", caseLevel: true });;
  });

},

searchCompanion2: function (Q) {
  return new Promise((resolve, reject) => {
    User.find(Q, function (err, users) {
      if (err || !users) {
        console.log(err);
      }
      return resolve(users);
    },
    ).sort({ fname: 1 }).collation({ locale: "en", caseLevel: true }).sort({ lname: 1 }).collation({ locale: "en", caseLevel: true });;
  });
},

It's as simple as checking if the fields entered (firstname, lastname) matches any user in the database.

module.exports.checkFullName = (req, res, next) => {
    myCollection.findOne({ firstName: req.firstname, lastName: req.lastname },
        (err, user) => {
            if (!user)
                return res.status(404).json({ status: false, message: 'User not found' });
            else
                return res.status(200).json({ status: true,  user });
        }
    );
}

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