如何使用go pg CRUD Postgres Point数据类型

Question

I am using Point datatype for storing coordinates in Postgres DB. How do I map Point datatype to Go lang datatypes? I am not finding any documentation for the same.

Answer 1

go-pg does not have native support to Point type (as of PostGIS). What I've done to overpass that (may not be the best solution but I did manage to make it work) was to put on my model individual Latitude and Longitude fields, and on the query itself use ColumnExpr to get individual values using ST_X (for longitude) and ST_Y (for latitude, don't forget that).

Model:

type MyModel struct {
    ID              int64
    Name            string
    LocationLat     float64
    LocationLon     float64
}

Query:

err := db.Model(&myModel).
        Column("id", "name").
        ColumnExpr("ST_X(location) AS location_lon").
        ColumnExpr("ST_Y(location) AS location_lat").
        Where("id = ?", id).
        Select()