Utsuhoagie Posts - Answer Overflow

Utsuhoagie

Explore posts from servers

•Created by Utsuhoagie on 7/10/2023 in #questions

Create-if-not-exists multiple explicit many-to-many relations

(note: I'm new to using Prisma and unfamiliar with the syntax) I have Playlist and Video models, with an explicit many-to-many relationship (to hold extra data). Say I have an array of Video primary keys, how do I add these videos to a playlist, if they aren't already in it? My closest working example is this. To my understanding, upsert is actually an "create-if-not-exists, otherwise update" operation, but with an empty object for update thus working similarly to what I want (albeit slightly more complicated). However, here I am only adding 1 video to the playlist at once. Is there a way to add multiple videos (aka creating multiple many-to-many relations to the join table between Playlist & Video), ideally in one query?

const id = /* Playlist's ID */
const videoUrl = /* Video's Url, which is its primary key */
// I want to use an array of videoUrls instead, not just one

const updatedPlaylist = await prisma.playlist.update({
  where: { id },
  include: { videos: { include: { video: true } } },
  data: {
    videos: {
      upsert: {
        where: {
          playlistId_videoUrl: {
            playlistId: id,
            videoUrl: videoUrl,
          },
        },
        create: {
          addedAt: new Date(),
          video: {
            connect: { url: videoUrl },
          },
        },
        update: {},
      },
    },
  },
});

const id = /* Playlist's ID */
const videoUrl = /* Video's Url, which is its primary key */
// I want to use an array of videoUrls instead, not just one

const updatedPlaylist = await prisma.playlist.update({
  where: { id },
  include: { videos: { include: { video: true } } },
  data: {
    videos: {
      upsert: {
        where: {
          playlistId_videoUrl: {
            playlistId: id,
            videoUrl: videoUrl,
          },
        },
        create: {
          addedAt: new Date(),
          video: {
            connect: { url: videoUrl },
          },
        },
        update: {},
      },
    },
  },
});

2 replies

Gaming

Programming