Do not add @SystemLevel attributes when generating components

[IskandarovRost]

CUBA Platform version: 7.2.7
CUBA Studio plugin version: 14.0.SNAPSHOT2510-202
IntelliJ version: IntelliJ IDEA 2020.2 (Community Edition)
Frontend generator 3.1.1

There is an ability to link entities from different datastores in Platform, and it is also supported by Studio
See the documentation: https://doc.cuba-platform.com/manual-latest/data_store.html#cross_datastore_ref

1. Create an additional datastore in Studio

cuba.additionalStores=pgAds,

cuba.persistenceConfig_pgAds=+com/company/adstest2708/pgAds-persistence.xml

2. Create "MainEnt" in the main datastore

@Table(name = "ADSTEST2708_MAIN_ENT")
@Entity(name = "adstest2708_MainEnt")
public class MainEnt extends StandardEntity {
    private static final long serialVersionUID = 2071190532239818500L;

    @Column(name = "ME_FLD")
    private String meFld;
 ...
    }
}

3. Create "AdditionalEntity" in the second datastore
4. Add a link to "MainEnt" (the entity from the first datastore)
   See Studio generated the attribute which is 'SystemLevel' @SystemLevel @Column(name = "MY_MAIN_ID") private UUID myMainId;

@Table(name = "ADSTEST2708_ADDITIONAL_ENTITY")
@Entity(name = "adstest2708_AdditionalEntity")
public class AdditionalEntity extends StandardEntity {
    private static final long serialVersionUID = 7284383439194045433L;

    @Column(name = "AE_FLD")
    private String aeFld;

    @SystemLevel
    @Column(name = "MY_MAIN_ID")
    private UUID myMainId;

    @Transient
    @MetaProperty(related = "myMainId")
    private MainEnt myMain;

5. Create Front module
   See the UUID attribute definition in projectModel.json

"name":"myMainId","type":{"packageName":"java.util","className":"UUID","fqn":"java.util.UUID","label":"UUID"},"mappingType":"DATATYPE","readOnly":false,"column":"MY_MAIN_ID","mandatory":false,"unique":false,"length":"255","transient":false}

5. Generate CRUD-Components for both the entities

6. Start the application

7. Open Additional entity editor

AR: the UUID @systemlevel field is presented

When a new instance is created and a linked entity is selected the UUID field is empty - it is not auto-filled immediately only on the instance saving: It looks not so pretty

ER:
Vaadin UI (Generated by Studio) does not show this field at all neither in browser nor in the editor