Getting below error while trying to fetch data from Decoupled application for a link field with limited cardinality like 4 and only add 3 links to the field. This field should be included in a paragraph and that paragraph should be linked to a content.
GraphQL\Error\InvariantViolation: Cannot return null for non-nullable field "ParagraphDirectLinksBlock.links". in GraphQL\Executor\ReferenceExecutor->completeValue() (line 748 of /var/www/html/vendor/webonyx/graphql-php/src/Executor/ReferenceExecutor.php).
Create a paragraph.
Add Link field with cardinality 4.
Add this paragraph to a node. For example Article.
Now add an Article content.
Add paragraph and in paragraph only add 2 or 3 links.
Now try to fetch the data from FE application.
Update below code in given file docroot/modules/contrib/graphql_compose/src/Plugin/GraphQL/DataProducer/FieldProducerPlugin.php
public function resolveFieldItems(FieldItemListInterface $field, FieldContext $context): array {
$plugin = $this->getContextValue('plugin');
if ($plugin instanceof FieldProducerItemsInterface) {
return $plugin->resolveFieldItems($field, $context);
}
$results = [];
foreach ($field as $item) {
if (!empty($result = $this->resolveFieldItem($item, $context))) {
$results[] = $result;
}
}
return $results;
} public function resolveFieldItems(FieldItemListInterface $field, FieldContext $context): array {
$plugin = $this->getContextValue('plugin');
if ($plugin instanceof FieldProducerItemsInterface) {
return $plugin->resolveFieldItems($field, $context);
}
$results = [];
foreach ($field as $item) {
$results[] = $this->resolveFieldItem($item, $context);
}
return $results;
}Active
2.3
Code
I suppose instead of
if (!empty($result = $this->resolveFieldItem($item, $context))) {
Could you use is_null ?
Hmm, nah not passing tests.
I'll try take a look at this next