Insert data in a 4D spatial column using Sequelize

问题

My application uses Node.js (v9.3.0), PostgreSQL (v9.5.1.0) as database with PostGIS (v2.2.1) installed as an extension and Sequelize (v4.37.6) as ORM. I'm trying to insert a 4D data - with longitude, latitude, altitude and a unix timestamp - in a LineStringZM column but I'm getting the following error:

DatabaseError: Column has M dimension but geometry does not

After some research, I've found out that Sequelize uses the function ST_GeomFromGeoJSON to insert spatial data. However, this function seems to ignore the 4th dimension in my GeoJSON data, which causes the error above.

I suppose that a raw query using ST_MakeLine (with the appropriated input) instead of ST_GeomFromGeoJSON would solve my problem. However, is there an easier way or a more elegant solution to insert a 4D spatial data using Sequelize?

Aditional info:

Model sample:

const GEOGRAPHY = require('sequelize').GEOGRAPHY

module.exports = function (sequelize, DataTypes) {
  let Course = sequelize.define('Course', {
    id: {
      type: DataTypes.INTEGER,
      primaryKey: true,
      allowNull: false,
      autoIncrement: true
    },
    gps: {
      type: GEOGRAPHY('LinestringZM', 4326)
    }
  }, {
    tableName: 'courses',
    timestamps: false,
    paranoid: false
  })

  return Course
}

Insertion code generated by Sequelize:

INSERT INTO "courses" ("gps") 
VALUES (St_geomfromgeojson(
  '{"type":"LineString","crs":{"type":"name","properties"{"name":"EPSG:4326"}},"coordinates":[[-44.058367,-19.964709,0,1521552190]]}'
));

The SQL above returns the following exception: DatabaseError: Column has M dimension but geometry does not.

Successful insertion using ST_MakeLine:

INSERT INTO "courses" ("gps")
VALUES (ST_MakeLine(ST_MakePoint(1,2, 10, 1), ST_MakePoint(3,4, 10, 1)));

来源：https://stackoverflow.com/questions/49800163/insert-data-in-a-4d-spatial-column-using-sequelize

标签

postgresql

sequelize.js

PostGIS