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I want to display a block on each page (nodes as well as pages created by Views) that displays links to nodes that are tagged with a certain taxonomy term.

How to decide which tag should be used:

  • {1} If the page is a node that references a taxonomy term:
    use the referenced term
  • {2} If the page is a node that doesn’t reference a taxonomy term (= empty value):
    use the term with ID 1
  • {3} If the page is not a node (= created by Views):
    use the term with ID 1

I managed to get the links shown in case {1}, by using the relationship "Content: Taxonomy terms on node" and the contextual filter "Taxonomy term: Term ID" which uses the relationship.

I selected "Provide a default value" (Type: "Taxonomy term ID from URL" + "Load default filter from node page, that’s good for related taxonomy blocks"). So I can’t specify the default value here for case {2} and {3}.

Then I thought I could use the validation options somehow, but "Action to take if filter value does not validate" does not allow me to set a specific value in case the original default value does not exist.

How could I solve this?

tl;dr: I need something like: Take term ID from URL (via node ID), and if this gives no term ID, use term ID 1 instead.

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Just set your contextual filter to return 1 when the value is not available like so:

Drupal Answer

  • But I already used this field for case {1}, to provide the term ID as default value. – unor Mar 30 '16 at 18:06
  • I think your only solution is to use Php code on the contextual filters then. Check if it's a node, then use node_load(), check taxonomy term and return it, if it's not a node return 1 – guibfo Mar 30 '16 at 18:26

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