bknd/app/__test__/data/specs/WithBuilder.spec.ts

import { afterAll, describe, expect, test } from "bun:test";
import {
   Entity,
   EntityManager,
   ManyToManyRelation,
   ManyToOneRelation,
   PolymorphicRelation,
   TextField,
   WithBuilder
} from "../../../src/data";
import { getDummyConnection } from "../helper";

const { dummyConnection, afterAllCleanup } = getDummyConnection();
afterAll(afterAllCleanup);

describe("[data] WithBuilder", async () => {
   test("missing relation", async () => {
      const users = new Entity("users", [new TextField("username")]);
      const em = new EntityManager([users], dummyConnection);

      expect(() =>
         WithBuilder.addClause(em, em.connection.kysely.selectFrom("users"), users, ["posts"])
      ).toThrow('Relation "posts" not found');
   });

   test("addClause: ManyToOne", async () => {
      const users = new Entity("users", [new TextField("username")]);
      const posts = new Entity("posts", [new TextField("content")]);
      const relations = [new ManyToOneRelation(posts, users, { mappedBy: "author" })];
      const em = new EntityManager([users, posts], dummyConnection, relations);

      const qb = WithBuilder.addClause(em, em.connection.kysely.selectFrom("users"), users, [
         "posts"
      ]);

      const res = qb.compile();

      expect(res.sql).toBe(
         'select (select coalesce(json_group_array(json_object(\'id\', "agg"."id", \'content\', "agg"."content", \'author_id\', "agg"."author_id")), \'[]\') from (select "posts"."id" as "id", "posts"."content" as "content", "posts"."author_id" as "author_id" from "posts" where "users"."id" = "posts"."author_id" limit ?) as agg) as "posts" from "users"'
      );
      expect(res.parameters).toEqual([5]);

      const qb2 = WithBuilder.addClause(
         em,
         em.connection.kysely.selectFrom("posts"),
         posts, // @todo: try with "users", it gives output!
         ["author"]
      );

      const res2 = qb2.compile();

      expect(res2.sql).toBe(
         'select (select json_object(\'id\', "obj"."id", \'username\', "obj"."username") from (select "users"."id" as "id", "users"."username" as "username" from "users" where "posts"."author_id" = "users"."id" limit ?) as obj) as "author" from "posts"'
      );
      expect(res2.parameters).toEqual([1]);
   });

   test("test with empty join", async () => {
      const qb = { qb: 1 } as any;

      expect(WithBuilder.addClause(null as any, qb, null as any, [])).toBe(qb);
   });

   test("test manytomany", async () => {
      const posts = new Entity("posts", [new TextField("title")]);
      const categories = new Entity("categories", [new TextField("label")]);

      const entities = [posts, categories];
      const relations = [new ManyToManyRelation(posts, categories)];

      const em = new EntityManager(entities, dummyConnection, relations);
      await em.schema().sync({ force: true });

      await em.mutator(posts).insertOne({ title: "fashion post" });
      await em.mutator(posts).insertOne({ title: "beauty post" });

      await em.mutator(categories).insertOne({ label: "fashion" });
      await em.mutator(categories).insertOne({ label: "beauty" });
      await em.mutator(categories).insertOne({ label: "tech" });

      await em.connection.kysely
         .insertInto("posts_categories")
         .values([
            { posts_id: 1, categories_id: 1 },
            { posts_id: 2, categories_id: 2 },
            { posts_id: 1, categories_id: 2 }
         ])
         .execute();

      //console.log((await em.repository().findMany("posts_categories")).result);

      const res = await em.repository(posts).findMany({ with: ["categories"] });

      expect(res.data).toEqual([
         {
            id: 1,
            title: "fashion post",
            categories: [
               { id: 1, label: "fashion" },
               { id: 2, label: "beauty" }
            ]
         },
         {
            id: 2,
            title: "beauty post",
            categories: [{ id: 2, label: "beauty" }]
         }
      ]);

      const res2 = await em.repository(categories).findMany({ with: ["posts"] });

      //console.log(res2.sql, res2.data);

      expect(res2.data).toEqual([
         {
            id: 1,
            label: "fashion",
            posts: [{ id: 1, title: "fashion post" }]
         },
         {
            id: 2,
            label: "beauty",
            posts: [
               { id: 2, title: "beauty post" },
               { id: 1, title: "fashion post" }
            ]
         },
         {
            id: 3,
            label: "tech",
            posts: []
         }
      ]);
   });

   test("polymorphic", async () => {
      const categories = new Entity("categories", [new TextField("name")]);
      const media = new Entity("media", [new TextField("path")]);

      const entities = [media, categories];
      const single = new PolymorphicRelation(categories, media, {
         mappedBy: "single",
         targetCardinality: 1
      });
      const multiple = new PolymorphicRelation(categories, media, { mappedBy: "multiple" });

      const em = new EntityManager(entities, dummyConnection, [single, multiple]);

      const qb = WithBuilder.addClause(
         em,
         em.connection.kysely.selectFrom("categories"),
         categories,
         ["single"]
      );
      const res = qb.compile();
      expect(res.sql).toBe(
         'select (select json_object(\'id\', "obj"."id", \'path\', "obj"."path") from (select "media"."id" as "id", "media"."path" as "path" from "media" where "media"."reference" = ? and "categories"."id" = "media"."entity_id" limit ?) as obj) as "single" from "categories"'
      );
      expect(res.parameters).toEqual(["categories.single", 1]);

      const qb2 = WithBuilder.addClause(
         em,
         em.connection.kysely.selectFrom("categories"),
         categories,
         ["multiple"]
      );
      const res2 = qb2.compile();
      expect(res2.sql).toBe(
         'select (select coalesce(json_group_array(json_object(\'id\', "agg"."id", \'path\', "agg"."path")), \'[]\') from (select "media"."id" as "id", "media"."path" as "path" from "media" where "media"."reference" = ? and "categories"."id" = "media"."entity_id" limit ?) as agg) as "multiple" from "categories"'
      );
      expect(res2.parameters).toEqual(["categories.multiple", 5]);
   });

   /*test("test manytoone", async () => {
      const posts = new Entity("posts", [new TextField("title")]);
      const users = new Entity("users", [new TextField("username")]);
      const relations = [
         new ManyToOneRelation(posts, users, { mappedBy: "author" }),
      ];
      const em = new EntityManager([users, posts], dummyConnection, relations);
      console.log((await em.schema().sync(true)).map((s) => s.sql).join("\n"));
      await em.schema().sync();

      await em.mutator().insertOne("users", { username: "user1" });
      await em.mutator().insertOne("users", { username: "user2" });

      await em.mutator().insertOne("posts", { title: "post1", author_id: 1 });
      await em.mutator().insertOne("posts", { title: "post2", author_id: 2 });

      console.log((await em.repository().findMany("posts")).result);

      const res = await em.repository().findMany("posts", { join: ["author"] });
      console.log(res.sql, res.parameters, res.result);
   });*/
});