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$toInt

The `$toInt` operator converts a specified value into an integer value.

Syntax

{
  $toInt: <expression>
}

Parameters

expressionobjectrequired

The specified value to convert into an Integer value.

Examples

Sample Data

{
  "_id": "0fcc0bf0-ed18-4ab8-b558-9848e18058f4",
  "name": "First Up Consultants | Beverage Shop",
  "location": { "lat": -89.2384 }
}

Convert a Double to Integer

Convert the latitude field from double to int.

This query truncates a double value to an integer.

Query:

db.stores.aggregate([{
  $match: { _id: "b0107631-9370-4acd-aafa-8ac3511e623d" }
}, {
  $project: {
    originalLatitude: "$location.lat",
    latitudeAsInt: { $toInt: "$location.lat" }
  }
}])

Output:

[
  {
    "_id": "b0107631-9370-4acd-aafa-8ac3511e623d",
    "originalLatitude": 72.8377,
    "latitudeAsInt": 72
  }
]

Convert a String to Integer

Convert the string "72" to an integer value.

This query converts a string representation of an integer.

Query:

db.stores.aggregate([{
  $match: { _id: "b0107631-9370-4acd-aafa-8ac3511e623d" }
}, {
  $project: {
    originalLatitude: "$location.lat",
    latitudeAsInt: {
      $toInt: { $toString: "72" }
    }
  }
}])

Output:

[
  {
    "_id": "b0107631-9370-4acd-aafa-8ac3511e623d",
    "originalLatitude": 72.8377,
    "latitudeAsInt": 72
  }
]

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