public commit

app/src/data/entities/query/WithBuilder.ts

@@ -0,0 +1,42 @@
+import type { Entity, EntityManager, RepositoryQB } from "../../entities";
+
+export class WithBuilder {
+   private static buildClause(
+      em: EntityManager<any>,
+      qb: RepositoryQB,
+      entity: Entity,
+      withString: string
+   ) {
+      const relation = em.relationOf(entity.name, withString);
+      if (!relation) {
+         throw new Error(`Relation "${withString}" not found`);
+      }
+
+      const cardinality = relation.ref(withString).cardinality;
+      //console.log("with--builder", { entity: entity.name, withString, cardinality });
+
+      const fns = em.connection.fn;
+      const jsonFrom = cardinality === 1 ? fns.jsonObjectFrom : fns.jsonArrayFrom;
+
+      if (!jsonFrom) {
+         throw new Error("Connection does not support jsonObjectFrom/jsonArrayFrom");
+      }
+
+      try {
+         return relation.buildWith(entity, qb, jsonFrom, withString);
+      } catch (e) {
+         throw new Error(`Could not build "with" relation "${withString}": ${(e as any).message}`);
+      }
+   }
+
+   static addClause(em: EntityManager<any>, qb: RepositoryQB, entity: Entity, withs: string[]) {
+      if (withs.length === 0) return qb;
+
+      let newQb = qb;
+      for (const entry of withs) {
+         newQb = WithBuilder.buildClause(em, newQb, entity, entry);
+      }
+
+      return newQb;
+   }
+}