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Allow creation of gallery posts #187

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Allow creation of gallery posts #187

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eb8fef3
allow creation of gallery posts
Yorkemartin Jun 17, 2025
70deb23
Merge branch 'main' into gallery-posts
Yorkemartin Jun 17, 2025
a3cbeb6
Merge branch 'main' into gallery-posts
Yorkemartin Jun 19, 2025
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5 changes: 2 additions & 3 deletions packages/public-api/src/apis/reddit/models/Post.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -198,9 +198,8 @@ export type SubmitMediaOptions = CommonSubmitPostOptions & {
// If `kind` is "video" or "videogif" this must be set to the thumbnail URL
// https://www.reddit.com/dev/api/#POST_api_submit
videoPosterUrl?: string;
// If `kind` is "image" this must be set to the image URL
// Currently Devvit only supports posts with a single image
imageUrls?: [string];
// If multiple image URLs are supplied (2-20) Reddit will automatically create a gallery post.
imageUrls?: string[];
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@niedzielski niedzielski Feb 2, 2026

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sadly, multiple images are unsupported on the backend:

if len(req.GetImageUrls().GetValues()) != 1 {
	return nil, status.Error(codes.Unimplemented, "only posts with a single image are allowed")
}

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@awe719 awe719 Feb 3, 2026

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To heck with it all then I'm glad you got a job

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@awe719 awe719 Feb 3, 2026

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Poll - Which humanoid robot from CES 2026 is the most promising_.png

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@awe719 awe719 Feb 3, 2026

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  • #### @

};

export type SubmitSelfPostOptions = PostTextOptions & CommonSubmitPostOptions;
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48 changes: 48 additions & 0 deletions packages/public-api/src/apis/reddit/tests/post.api.test.ts
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Expand Up @@ -319,7 +319,55 @@ describe('Post API', () => {
);
});
});
test('submit(): can create gallery post with multiple images', async () => {
const { reddit, metadata } = createTestRedditApiClient();
const mockedPost = new Post(
{
...defaultPostData,
gallery: [
{
url: 'https://example.com/1.jpg',
width: 1080,
height: 1080,
status: GalleryMediaStatus.VALID,
},
{
url: 'https://example.com/2.jpg',
width: 1080,
height: 1080,
status: GalleryMediaStatus.VALID,
},
],
},
metadata
);

const spyPlugin = vi.spyOn(Devvit.redditAPIPlugins.LinksAndComments, 'Submit');
spyPlugin.mockImplementationOnce(async () => ({
json: { data: { id: 'post' }, errors: [] },
}));

vi.spyOn(Post, 'getById').mockResolvedValueOnce(mockedPost);

const imageUrls = ['https://example.com/1.jpg', 'https://example.com/2.jpg'];

await reddit.submitPost({
title: 'My Gallery Post',
subredditName: 'askReddit',
kind: 'image',
imageUrls,
});

expect(spyPlugin).toHaveBeenCalledWith(
expect.objectContaining({
kind: 'image',
imageUrls,

}),
metadata
);
});
});
describe('setTextFallback()', () => {
test('throws error if no fallback was set', async () => {
const { metadata } = createTestRedditApiClient();
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