.js

check(data, Array);

    for (let i = 0; i < data.length; i++) {
      let item = data[i];
      let location_exists = Locations.findOne({
        name: item.LOCATION
      });
      let district_exists = Districts.findOne({
        name: item.DISTRICT
      });
      let place_exists = Places.findOne({
        name: item.PLACE_NAME
      });

      if (!location_exists) {
        Locations.insert({
          name: item.LOCATION
        }, function (l_err, l_res) {
          if (l_res) {

            if (!district_exists) {
              Districts.insert({
                name: item.DISTRICT,
                location_id: l_res,
              }, function (d_err, d_res) {
                if (d_res) {

                  if (!place_exists) {
                    Places.insert({
                      name: item.PLACE_NAME,
                      district_id: d_res,
                      type: item.PLACE_TYPE,
                      from_center: item.FROM_AIRPORT
                    });
                  } else {
                    Places.insert({
                      name: item.PLACE_NAME,
                      district_id: district_exists._id,
                      type: item.PLACE_TYPE,
                      from_center: item.FROM_AIRPORT
                    })
                  }
                }
              })
            } else {
              Places.insert({
                name: item.PLACE_NAME,
                district_id: district_exists._id,
                type: item.PLACE_TYPE,
                from_center: item.FROM_AIRPORT
              })
            }
          }
        })
      } else {
        if (!district_exists) {
          Districts.insert({
            name: item.DISTRICT,
            location_id: location_exists._id,
          }, function (d_err, d_res) {
            if (d_res) {

              if (!place_exists) {
                Places.insert({
                  name: item.PLACE_NAME,
                  district_id: d_res,
                  type: item.PLACE_TYPE,
                  from_center: item.FROM_AIRPORT
                });
              } else {
                Places.insert({
                  name: item.PLACE_NAME,
                  district_id: district_exists._id,
                  type: item.PLACE_TYPE,
                  from_center: item.FROM_AIRPORT
                })
              }
            }
          })
        } else {
          Places.insert({
            name: item.PLACE_NAME,
            district_id: district_exists._id,
            type: item.PLACE_TYPE,
            from_center: item.FROM_AIRPORT
          })
        }
      }
    }