Partial Response With NULL value

[roma-glushko]

Preconditions

1. Magento 2 Open Source
2. GraphQL modules

Steps to reproduce

1. Execute GraphQL request that should return partial response

Expected result

1. Response should contain errors and data keys.
2. If item can be retrieved via GraphQL a new item to errors array is added, no NULL value is also added to data key

Actual result

1. Response should contain errors and data keys.
2. If item can be retrieved via GraphQL a new item to errors array is added, but null value is also added to data key

Looks like this is a default GraphQL behaviour defined in vendor/webonyx/graphql-php/src/Executor/Executor.php:769 class. However, it's needed to consider if we can improve this point.

[naydav]

Fixed in #221 (comment)