change chemical to be taxonomy term

config/install/asset.type.chemical.yml

@@ -1,12 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  enforced:
-    module:
-      - farm_agrikern
-id: chemical
-label: Chemical
-description: 'Chemical Asset'
-name_pattern: 'Chemical asset [asset:id]'
-workflow: asset_default
-new_revision: true

src/Plugin/Asset/AssetType/Chemical.php

@@ -1,23 +0,0 @@
-<?php
-
-namespace Drupal\farm_agrikern\Plugin\Asset\AssetType;
-
-use Drupal\farm_entity\Plugin\Asset\AssetType\FarmAssetType;
-
-/**
-* Provides the chemical asset type.
-*
-* @AssetType(
-*   id = "chemical",
-*   label = @Translation("Chemical"),
-* )
-*/
-class Chemical extends FarmAssetType {
-    /**
-    * {@inheritdoc}
-    */
-    public function buildFieldDefinitions() {
-        $fields = parent::buildFieldDefinitions();
-        return $fields;
-    }
-}

src/Plugin/Asset/AssetType/Ingredient.php

@@ -22,11 +22,12 @@ class Ingredient extends FarmAssetType {
             'chemical_field' => [
                 'type' => 'entity_reference',
                 'label' => $this->t('Chemical'),
-                'description' => $this->t('What chemical does the ingredient track?'),
-                'target_type' => 'asset',
+                'description' => $this->t("What chemical does the ingredient track?"),
+                'target_type' => 'taxonomy_term',
                 'target_bundle' => 'chemical',
-                'multiple' => FALSE,
+                'auto_create' => FALSE,
                 'required' => TRUE,
+                'multiple' => FALSE,
             ],
             'amount_field' => [
                 'type' => 'fraction',