API call for reverse_dependencies fails for Attribute-Handlers

[jkeenan]

The following API call to fastapi.metacpan.org succeeds:

$ curl https://fastapi.metacpan.org/reverse_dependencies/dist/List-Compare > result.json; head result.json
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  543k  100  543k    0     0  1167k      0 --:--:-- --:--:-- --:--:-- 1167k
{
   "data" : [
      {
         "archive" : "Code-TidyAll-0.81.tar.gz",
         "id" : "rLLAi_NSMYS1zQR7xXUYu5vgaMY",
         "maturity" : "released",
         "tests" : {
            "fail" : 6,
            "pass" : 228,
            "na" : 0,

As does this one:

$ curl https://fastapi.metacpan.org/reverse_dependencies/dist/Term-ReadLine > result.json; head result.json
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  733k  100  733k    0     0  1694k      0 --:--:-- --:--:-- --:--:-- 1694k
{
   "data" : [
      {
         "resources" : {
            "homepage" : "http://netdisco.org/",
            "bugtracker" : {
               "web" : "https://github.com/netdisco/netdisco/issues"
            },
            "repository" : {
               "url" : "https://github.com/netdisco/netdisco"

But this call fails:

$ curl https://fastapi.metacpan.org/reverse_dependencies/dist/Attribute-Handlers > result.json; head result.json
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    76  100    76    0     0    377      0 --:--:-- --:--:-- --:--:--   378
{
   "code" : 404,
   "message" : "The requested info could not be found"
}

This is unexpected. Attribute-Handlers, just like Term-ReadLine, is a dual-life CPAN release of a distribution maintained by Perl 5 Porters in the dist/ directory of the core distribution. So I would expect the call to succeed. Furthermore, reverse dependencies for Attribute::Handlers show up in the GUI at https://metacpan.org/module/Attribute::Handlers/requires?size=200.

Can you explain this anomaly?

[Grinnz]

distnames are not a "real" thing in PAUSE or dependency trees, so I would recommend doing lookups by module name instead if this is possible. (that said, I don't have an answer to the question)

[mickeyn]

@Grinnz you are right, but we do have an endpoint for dist level reverse dependencies in the dist page - so we do have logic show all dist's modules' deps.

These queries above are translated to the following behavior -

https://metacpan.org/dist/Attribute-Handlers/requires shows no results while https://metacpan.org/module/Attribute::Handlers/requires does

https://metacpan.org/dist/Type-Tiny/requires shows results as does https://metacpan.org/module/Type::Tiny/requires

So something could be a bit off. I'll have to dig into it a bit later.