Add Views relationships (both forward and reverse)

[olafgrabienski]

I'm trying to display a block with 'reverse' links to a referencing node. My post type has a reference field, and Article A displays a reference link to Article B, C, and D.

On Article B, C, and D I want to display a reverse link to Article A. As far as I remember from Drupal and Entity Reference, it was possible to use a relationship called "Referencing Entity". Using Reference I can't find this relation in Views, but only a "referenced by" relationship (e.g. Node referenced by field_post_related). I propose to add the "referencing" relationship as well.

Forward relationships Reference to:

Node 1 -> node 2

Reverse relationships Reference from:

Node 2 <- node 1

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Merged PR: #47

[olafgrabienski]

I just checked the References module and saw that it provides a Views relationship for a referencing field, see the following screenshot:

I tested the functionality quickly, and it works fine. I understood that one goal of Reference is to replace References and similar contrib modules in core. So I'm hoping that my current request is within the goal of Reference. What do you think, @mikemccaffrey ?

[jenlampton]

I just added the reverse relationship to my previous PR.

[olafgrabienski]

Great! Do you think the PR is ready for testing?

[jenlampton]

Yes please :)

[olafgrabienski]

Hm, I've downloaded the ZIP from https://github.com/jenlampton/reference/tree/21-views-relationships to a quite fresh Backdrop site and tried to enable the module, but after hitting "Save configuration" I see an empty white page instead of the confirmation page. When I navigate to other pages by typing another path in the address bar, everything seems fine, and when I turn back to the Modules list page, the Reference module isn't enabled. Trying to enable it again, leads to the same white screen.

Before, on another test site, I replaced the folder of the Reference beta release with the 21-views-relationships branch while the module was enabled. In this case, I got a white screen on several admin pages.

[olafgrabienski]

Today I've tried once more to install and enable the ZIP from https://github.com/jenlampton/reference/tree/21-views-relationships on a Backdrop site but I got the same result: After installation I tried to enable the module and got an empty white page instead of the confirmation page, and the module wasn't enabled. There were no errors in DBlog. @jenlampton does it work for you?