Display all the images of a category together using FastCCI

[ShridharGoel]

Summary:

Suppose an image is present in a particular subcategory which corresponds to a particular category. Currently, the app would show the image only in that subcategory and not in the list of images of the category.

If some image is in a subcategory, it should also be shown in the parent category of that subcategory. This can be implemented using FastCCI.

Steps to reproduce:

1. Go to Explore.
2. Search for something.
3. Go to a category. Media tab would show the images.
4. Click on the subcategories tab and then go to a subcategory.
5. Not all images of the subcategory would have been present in the category.

Commons app version:

Latest master

Would you like to work on the issue?

Yes

[ShridharGoel]

@misaochan @nicolas-raoul @maskaravivek @neslihanturan Your views on this?

[nicolas-raoul]

I totally agree!
Using FastCCI you could even display the best (featured/etc) images first.

[misaochan]

Tentatively sounds good to me. However, the use of FastCCI would require a complete overhaul of our current Commons query, right? Do we know how reliable the database is?

[nicolas-raoul]

Last year it was not reliable, with months-long downtimes :-/

[misaochan]

Hm, in that case is it a good idea to do this? We would need a very thorough fallback mechanism if we do.

[ShridharGoel]

We'll need to set a mechanism where it would use the current system if the FastCCI servers go down, although I think that would rarely happen.