Add a Custom Mutation Operator

For adding a new mutation operator two steps are necessary:

• add a type definition
• add the operator implementation

Type Definition

Add a section similar to this one to your services.yml file.

  pimcore.datahub.graphql.dataobjectmutationtypegenerator_operator_mycustommutationoperator:
    class: Pimcore\Bundle\DataHubBundle\GraphQL\DataObjectMutationOperatorConfigGenerator\MyCustomMutationOperator
    tags:
      - { name: pimcore.datahub.graphql.dataobjectmutationtypegenerator, id: typegenerator_mutationoperator_mycustommutationoperator }                        

For reference have a look at: IfEmpty Operator.

This will again define a processor (see the next subsection) and try to automatically determine the input type depending on its child element.

Operator Implementation

You have to provide both JavaScript code dealing with the UI configuration aspects specific to your operator and the server-side PHP implementation processing the input (the input processor according to your input schema).

A JS sample can be found here.

Note that the namespace in your case would be pimcore.plugin.datahub.mutationoperator.mycustommutationoperator.

Make sure that your extension gets loaded. See Pimcore Bundles docs page for further details.

Next thing is to provide the input processor on the server side. A sample can be found here. It will get the child value and only overwrite the current value if it is empty.