How can I use the point type coordinate information of postgis in graphql using mutations? - postgresql

Question

I created a mutation to insert new data into the postgresql called location. The column coordinate must receive and store data, for example, ST_GeomFromGeoJSON ('{ "type": "Point", "coordinates": [-48.23456,20.12345]}').
However, graphql is not working, so I don't know where to modify it. I think it's because the scalar called GeoJSONPoint that I made is not working properly. Could you tell me how to create a scalar if graphql puts the data above?
GeoJSONPoint Scalar
import { GraphQLScalarType, Kind } from 'graphql';
export const GeoJSONPoint = new GraphQLScalarType({
name: 'GeoJSONPoint',
description: 'Geometry scalar type',
parseValue(value) {
return value;
},
serialize(value) {
return value;
},
parseLiteral(ast) {
if (ast.kind === Kind.OBJECT) {
console.log(ast);
return new Object(ast);
}
return null;
}
});
location.entity
import {
Column,
CreateDateColumn,
Entity,
JoinColumn,
ManyToOne,
PrimaryGeneratedColumn
} from 'typeorm';
import { Location_Group } from './location_group.entity';
import { Geometry } from 'geojson';
import { Field, ID, Int, ObjectType } from '#nestjs/graphql';
import { GeoJSONPoint } from 'src/scalar/geoJSONPoint.scalar';
#ObjectType()
#Entity('location')
export class Location {
#Field(() => ID)
#PrimaryGeneratedColumn('increment')
id: number;
#Field(() => String)
#Column({ type: 'varchar' })
name: string;
#Field(() => GeoJSONPoint)
#Column({
type: 'geometry',
nullable: true,
spatialFeatureType: 'Point',
srid: 4326
})
coordinate: Geometry;
#Field(() => Int)
#Column({ type: 'int' })
order_number: number;
#Field()
#CreateDateColumn({ type: 'timestamptz' })
created_at: Date;
#Field(() => Location_Group)
#ManyToOne(
() => Location_Group,
(location_group) => location_group.location
)
#JoinColumn([{ name: 'location_group_id', referencedColumnName: 'id' }])
location_group: Location_Group;
}
resolver
#Mutation(() => Location)
async createLocation(
#Args('data') data: LocationDataInput
): Promise<Location> {
console.log(data);
return await this.locationService.setLocation(data);
}

Answer 1

I solved this problem. First of all, we divided the values entered by parseLiteral in scalar into
{type: '', coordinates: []}
and removed the foreign key column.