323 bug the number of editions displayed when choosing a book is wrong

[apobrt]

Previously, it showed a wrong number of editions for every result. This PR fix this

[apobrt]

Closes also #180

[mateusz-bak]

Hmm I checked and it still displays wrong editions count.

For example try to search "mythos stephen fry" and check editions for the blue book.

[apobrt]

I found the reason of the mismatch: I show all editions returned by Open Library, but when they are displayed , they are filtered out if they don't have a cover image.

So, for example, "mythos stephen fry", in the fifth result, show correctly 10 results, but only 6 have the cover (see: https://openlibrary.org/books/OL28643252M/Mythos).

So now my doubt is: what we want to show? Only the ones with the covers? Or all of them?
A book without a cover is ugly, but it could be useful to avoid to manually insert all the info (maybe it lacks only the cover).

My proposal is:

• add a "stock" cover image to every edition that doesn't have one (to make it look better)
• show every edition (to not lose any valuable edition)

[mateusz-bak]

Good finds, I think that showing all of the editions, even without covers makes most sense (I see majority voted the same in the Matrix channel).

On the ones with missing covers - I would go with displaying them as they actually are - so without the covers. And to differentiate we could do title, author and release of the specific edition (as you suggested before).

In the future we need to come up with a system to add covers to books without them.