Issue 1521: Provide a way for repo admins to see RDF mappings

[mjordan]

Github issue: Islandora/documentation#1521

What does this Pull Request do?

Adds a report listing all the 1) configured Drupal-field-to-RDF properties and 2) all of the external URIs associated with taxonomy terms.

What's new?

• Adds a new controller at admin/reports/islandora/rdf_mappings that generates and renders the report
• Updates the getUriFieldNamesForTerms() function in the Islandora Utilities service

How should this be tested?

1. Check out this branch. Within the islandora module directory:
   1. git remote add mjordan https://github.com/mjordan/islandora.git
   2. git fetch mjordan
   3. git checkout issue-1521
2. Clear your cache (drush cr)
3. Visit Admin > Reports > Field and term RDF mappings (refresh if you don't see this new item)
4. You should see the report listing fields and their RDF property mappings, and near the bottom, all taxonomies with terms that have external URIs / authority links. It's a long list.

Additional Notes:

• Does this change the interface, add a new feature, or otherwise change behaviours that would require updating documentation? Yes, a new item, "Field and term RDF mappings", appears in Drupal's "Reports" menu.
• Does this change add any new dependencies? No.
• Does this change require any other modifications to be made to the repository (ie. Regeneration activity, etc.)? No.
• Could this change impact execution of existing code? Yes.

Interested parties

@Islandora/8-x-committers

[manez]

Tested and all seems well!

Would it be possible to have the Taxonomy terms in the list link to their respective nodes?

[mjordan]

Would it be possible to have the Taxonomy terms in the list link to their respective nodes?

Yes, it would. I'll do that. Should the link be on the term name?

Also, some terms apply to media - link to those as well?

[mjordan]

OK, terms are now linkable, e.g.:

[rosiel]

Great stuff Mark!

I can imagine future asks such as sorting and filtering options, being able to find 'all fields that map to X' and cluster them together, adding the vocabulary id's in their headers, and making the headers collapsible (once someone puts an entire repo of 'people' in, it'll be scroll city). But a 1000% improvement over not having a report! Thank you!

[mjordan]

@rosiel thanks! All good suggestions, I hope having something basic like this gets people thinking about more useful features. Linking Islandora/documentation#1529 for reference too.

[kayakr]

@mjordan @rosiel This is a nice report, but I've noticed a couple of things:

• it would be good to report on Type mapping, e.g. not just field level but entity to pcdm:Object, rico:Record etc.
• It only reports one mapping per field, but we have some fields with multiple mappings, e.g. title mapping to dcterms:title (appears in report) and rico:name(doesn't appear in report).

[mjordan]

@kayakr thanks! Since this is now merged, would you mind opening one or two separate issues? I'll take a look at both.