Compatibility with block field

I have done a basic test with block_field-8.x-1.0-alpha8.

With block plugin it works but when the block plugin is from a block entity the block entity is not imported automatically (because it is not an entity reference field).

I will set up test for at least block plugin.

And then see how to be able to import automatically block content. I think either a field enhancer plugin or adding a new event to alter field values.

JSON output:

               "field_es_test_block": [
                    {
                        "plugin_id": "system_powered_by_block",
                        "settings": {
                            "id": "system_powered_by_block",
                            "label": "Powered by Drupal",
                            "provider": "system",
                            "label_display": "visible"
                        }
                    },
                    {
                        "plugin_id": "block_content:516a333e-bac0-4c71-99ec-56ceb02efdf1",
                        "settings": {
                            "id": "block_content:516a333e-bac0-4c71-99ec-56ceb02efdf1",
                            "label": "aaaa",
                            "provider": "block_content",
                            "label_display": "visible",
                            "status": true,
                            "info": "",
                            "view_mode": "full"
                        }
                    }
                ],

Here is a patch that import automatically block content if a field enhancer is used on the server website.

After rethough, maybe an unset in the field enhancer plugin will be required. And no need of the event to go get the block content.