@ptc-org/nestjs-query-graphql
Version:
Nestjs graphql query adapter
43 lines • 1.79 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.AggregateRelationsLoader = void 0;
class AggregateRelationsLoader {
constructor(RelationDTO, relationName) {
this.RelationDTO = RelationDTO;
this.relationName = relationName;
}
createLoader(service) {
return async (queryArgs) => {
// group
const queryMap = this.groupQueries(queryArgs);
return this.loadResults(service, queryMap);
};
}
async loadResults(service, queryRelationsMap) {
const results = [];
await Promise.all([...queryRelationsMap.values()].map(async (args) => {
const { filter, aggregate } = args[0];
const dtos = args.map((a) => a.dto);
const aggregationResults = await service.aggregateRelations(this.RelationDTO, this.relationName, dtos, filter, aggregate);
const dtoRelationAggregates = dtos.map((dto) => aggregationResults.get(dto) ?? {});
dtoRelationAggregates.forEach((relationAggregate, index) => {
results[args[index].index] = relationAggregate;
});
}));
return results;
}
groupQueries(queryArgs) {
// group
return queryArgs.reduce((map, args, index) => {
const queryJson = JSON.stringify({ filter: args.filter, aggregate: args.aggregate });
if (!map.has(queryJson)) {
map.set(queryJson, []);
}
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
map.get(queryJson).push({ ...args, index });
return map;
}, new Map());
}
}
exports.AggregateRelationsLoader = AggregateRelationsLoader;
//# sourceMappingURL=aggregate-relations.loader.js.map