Contrib.social

Proper syntax when generating data for multivalue fields

Open on Drupal.org →
Created on 19 February 2025, about 1 month ago

Problem/Motivation

I need to populate a multivalue field based partially on the Feed source, among other things. I've built a custom plugin, but no matter how I format the data, I cannot populate more than one value in a multivalue field. My multivalue field is set for unlimited values. I can populate multiple values only through an array that's already part of the field (another multivalue field that doesn't require any tampering). However, even a simple rewrite (instead of passing the data directly from the feed) populates only the first value in the multivalue field.

I've tried a number of implode/explode options and checked the output before, during and after being processed, and at no point can I populate multiple values within the multivalue field. If I return $data as a string ("1,2,3"), it gets populated as a string in the first value, or if I implode, it gets populated as simply "Array." If I return $data as an array ([0]=>1, [1]=>2, [2]=>3), the first value in the multivalue field get populated only as "Array."

I'm running out of things to try and cannot really figure out why the field would always populate only as a single value despite the field being able to handle multiple values.

🐛 Bug report
Status

Active

Component

Code

Created by

🇺🇸United States bwoods

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Comments & Activities

  • Issue created by @bwoods
  • Comment about 1 month ago →
    🇳🇱Netherlands megachriz

    Can you share your configuration and the source data?

    There is a known issue at least with the Rewrite plugin that it cannot iterate through values properly. See #3224959: Rewrite plugin: iterate through values to rewrite → .

  • Comment about 1 month ago →
    🇺🇸United States bwoods

    Thanks, @megachriz! Not sure how I missed this in my search of the queue - I think this patch may work for my case. I will report back with more info if I'm still hitting a wall.

  • Comment about 1 month ago →
    🇺🇸United States bwoods

    @megachriz, I believe the main problem I was running into is that by using Feeds: Source as a source, I was unable to use a multivalue target. I tried the Tamper patch and several other options to no avail. I ended up making this adjustment:

    - Created a temporary target with Feeds: Source as the source.
    - Created a blank source with my multivalue field as the target.
    - Wrote all of the logic in a custom plugin, with the output as a string.
    - Used this plugin plus the Explode plugin to populate the multivalue field.

    This definitely would have been much easier if the data itself had contained the variable I was sending to do the lookup. As a basic example, the API I'm hitting is something like apisite.com?q=varid%3A%22123-456, but varid isn't actually returned in the dataset. So I have to parse 123-456 from the feed source to do the manipulations.

    I'm guessing this is pretty rare and maybe not too useful in most use cases, as I can't think of a reason Feed:Source should be able to process multivalue field targets anyway. So unless you think this should work and/or could be useful to others, I think it's appropriate to mark this as Closed "won't fix" or "works as designed."

    Thanks again for your help and your work on these great modules!

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