Question

我正在努力将geoJSON多边形数据插入postgis表中。 PostGis工作正常。我可以从PG客户端执行此查询，但它不能在rails中的应用程序中运行。

我的模型中的插入查询在rails中：

class Route < ActiveRecord::Base

  def self.AddNew(id_partner, route_name, polygon, active)

    sql = "INSERT INTO routes('idPartner', 'name', 'polygon', 'active') VALUES ('#{id_partner}', '#{route_name}', ST_GeomFromGeoJSON('#{polygon}'),4326), '#{active}')"
    ActiveRecord::Base.connection.execute(sql)
 end
end

我不断得到：

PG::SyntaxError: ERROR: syntax error at or near "'idPartner'" LINE 1: INSERT INTO routes('idPartner', 'name', 'polygon', 'active')... ^ : INSERT INTO routes('idPartner', 'name', 'polygon', 'active') VALUES ('8', 'Dara', ST_GeomFromGeoJSON('{"type":"POLYGON","id":null,"coordinates":[[[19.00634765625,52.736291655910925],[22.1484375,52.133488040771475],[22.236328125,52.8823912222619]]]}'),4326), '1')

表格结构：

-- Table: public.routes

CREATE TABLE public.routes
(
  id integer NOT NULL DEFAULT nextval('routes_id_seq'::regclass),
  "idPartner" integer,
  name character varying,
  polygon geometry(Geometry,4326),
  active integer,
  CONSTRAINT routes_pkey PRIMARY KEY (id)
)
WITH (
  OIDS=FALSE
);
ALTER TABLE public.routes
  OWNER TO postgres;

有什么想法吗？

Answer 1

您的SQL查询存在问题。首先，colums的名称与SQL语法不匹配。其次，参数polygon不正确，您必须使用函数transform srid转换grid，例如ST_SetSRID。您可以通过在postgresql示例中运行SQL来检查

INSERT INTO routes("idPartner", name, polygon, active) VALUES ('8', 'Dara', ST_SetSRID(ST_GeomFromGeoJSON(
    '{"type":"Polygon","coordinates":[[[19.00634765625,52.736291655910925],[22.1484375,52.133488040771475],[22.236328125,52.8823912222619]]]}'
),4326), '1');

Rails并将多边形数据（geojson）插入postgis表

1 个答案: