Alter rendering pipeline

[Koen Verheyen]

I'm upgrading a Blacklight site to version 6.3.3 which has a lot of refactoring in how documents are presented.

In the old version we had overridden the DocumentPresenter render_values method to do an non-html-safe join of values since they may contain HTML tags which we want to have rendered.

In BL 6.3.3 this has been replaced by the FieldPresenter/Pipeline mechanism. I can see there's a stack function that defines the methods that are executed in order to render the values there. I'd like to replace the Join step there with a custom NonHtmlSafeJoin method. What is the correct way to alter this stack? Can I override the default pipeline at some point? Of do I have to start from a custom ShowPresenter field_values method and everything from that point forward?

[Justin Coyne]

Here's how we overrode the pipeline to provide our own custom Join function:

https://github.com/sul-dlss/dlme/blob/master/config/initializers/blacklight.rb#L2-L7

Here is our Join processor and spec:
https://github.com/sul-dlss/dlme/blob/master/app/processors/join.rb
https://github.com/sul-dlss/dlme/blob/master/spec/processors/join_spec.rb

I hope this is helpful.

-Justin

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