# db.command.geoWithin
To set up a geographical location index for the queried field
Finds out the records in which the value of a field is within the specified area and displays the records without sorting. The specified area should be Polygon or MultiPolygon.
Method signature:
function geoWithin(IOptions): Command
interface IOptions {
geometry: Polygon | MultiPolygon // Geographical location
}
Sample code
const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database()
const _ = db.command
const { Point, LineString, Polygon } = db.Geo
exports.main = async (event, context) => {
return await db.collection('restaurants').where({
location: _.geoWithin({
geometry: Polygon([
LineString([
Point(0, 0),
Point(3, 2),
Point(2, 3),
Point(0, 0)
])
]),
})
})
}