STORING CO-ORDINATES

 GeoJSON

A STANDARD FORMAT FOR STORING GEOGRAPHIC POINTS.

HERE,DATA IS STORED IN THE FORM OF A POINT , IN WHICH LONGITUDES COMES FIRST.

THE FORMAT:

{
  "type" : "Point",
  "coordinates" : [
    -122.5,
    37.7
  ]
}

IN OUR MODELS(LISTING.JS) WE UPDATE THE SCHEMA OF LISTINGS.

WE ADD A NEW FIELD GEOMETRY ,SIMILAR TO THAT OF THE LOCATION FIELD IN THE DOCUMENT.

const citySchema = new mongoose.Schema({
  name: String,
  location: {
    type: {
      type: String, // Don't do `{ location: { type: String } }`
      enum: ['Point'], // 'location.type' must be 'Point'
      required: true
    },
    coordinates: {
      type: [Number],
      required: true
    }
  }
});

  geometry: {

    type: {

      type: String, // Don't do `{ location: { type: String } }`

      enum: ["Point"], // 'location.type' must be 'Point'

      required: true,

    },

    coordinates: {

      type: [Number],

      required: true,

    },

  },

});

IN LISTING.JS(CONTROLLER)

module.exports.postNewListing = async (req, res, next) => {

  let response = await geocodingClient

    .forwardGeocode({

      query: req.body.listing.location,

      limit: 2,

    })

    .send();

  let url = req.file.path;

  let filename = req.file.filename;

  const newListing = new Listing(req.body.listing);

  newListing.owner = req.user._id;

  newListing.image = { url, filename };

  newListing.geometry = response.body.features[0].geometry;

  let savedListing = await newListing.save();

  console.log(savedListing);