Null equivalence - Fix (#16050)

@charlesBochet 
In workflow codebase, NULL (instead of empty object) is expected on
workflow version object step field, when a new workflow is created for
example.
(packages/twenty-front/src/modules/workflow/workflow-diagram/utils/generateWorkflowDiagram.ts
- 42)
This case is not isolated and it creates many issues.

We decided to format NULL value to equivalent (empty string for text
field, empty object for raw_json) but it seems it complicates the dev x.

To unlock @Devessier I prefer revert the logic, the time we discuss how
to solve this cases.

packages/twenty-server/src/engine/twenty-orm/utils/format-result.util.ts

@@ -10,7 +10,6 @@ import { isDefined } from 'twenty-shared/utils';
 import {
   DEFAULT_ARRAY_FIELD_NULL_EQUIVALENT_VALUE,
   DEFAULT_COMPOSITE_FIELDS_NULL_EQUIVALENT_VALUE,
-  DEFAULT_RAW_JSON_FIELD_NULL_EQUIVALENT_VALUE,
   DEFAULT_TEXT_FIELD_NULL_EQUIVALENT_VALUE,
 } from 'src/engine/api/common/common-args-processors/data-arg-processor/constants/null-equivalent-values.constant';
 import { type FieldMetadataEntity } from 'src/engine/metadata-modules/field-metadata/field-metadata.entity';
@@ -199,10 +198,6 @@ function formatFieldMetadataValue(
       return DEFAULT_ARRAY_FIELD_NULL_EQUIVALENT_VALUE;
     }
 
-    if (fieldMetadataType === FieldMetadataType.RAW_JSON) {
-      return DEFAULT_RAW_JSON_FIELD_NULL_EQUIVALENT_VALUE;
-    }
-
     if (fieldMetadataType === FieldMetadataType.TEXT) {
       return DEFAULT_TEXT_FIELD_NULL_EQUIVALENT_VALUE;
     }

packages/twenty-server/src/modules/workflow/common/standard-objects/workflow.workspace-entity.ts

@@ -1,10 +1,10 @@
 import { msg } from '@lingui/core/macro';
+import { STANDARD_OBJECT_IDS } from 'twenty-shared/metadata';
 import {
+  ActorMetadata,
   FieldMetadataType,
   RelationOnDeleteAction,
-  ActorMetadata,
 } from 'twenty-shared/types';
-import { STANDARD_OBJECT_IDS } from 'twenty-shared/metadata';
 
 import { RelationType } from 'src/engine/metadata-modules/field-metadata/interfaces/relation-type.interface';
 import { Relation } from 'src/engine/workspace-manager/workspace-sync-metadata/interfaces/relation.interface';
@@ -85,7 +85,8 @@ export class WorkflowWorkspaceEntity extends BaseWorkspaceEntity {
     description: msg`The workflow name`,
     icon: 'IconSettingsAutomation',
   })
-  name: string;
+  @WorkspaceIsNullable()
+  name: string | null;
 
   @WorkspaceField({
     standardId: WORKFLOW_STANDARD_FIELD_IDS.lastPublishedVersionId,

packages/twenty-server/src/modules/workflow/workflow-trigger/jobs/workflow-trigger.job.ts

@@ -1,8 +1,8 @@
 import { Scope } from '@nestjs/common';
 
-import { isDefined } from 'class-validator';
 import isEmpty from 'lodash.isempty';
 import { FieldActorSource } from 'twenty-shared/types';
+import { isDefined } from 'twenty-shared/utils';
 
 import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
 import { Process } from 'src/engine/core-modules/message-queue/decorators/process.decorator';

packages/twenty-server/test/integration/graphql/suites/inputs-validation/create-validation/constants/successful-create-input-by-field-metadata-type.constant.ts

@@ -1,6 +1,7 @@
 import { type FieldMetadataTypesToTestForCreateInputValidation } from 'test/integration/graphql/suites/inputs-validation/types/field-metadata-type-to-test';
 import { TEST_TARGET_OBJECT_RECORD_ID_FIELD_VALUE } from 'test/integration/graphql/suites/inputs-validation/utils/setup-test-objects-with-all-field-types.util';
 import { FieldMetadataType } from 'twenty-shared/types';
+import { isEmptyObject } from 'twenty-shared/utils';
 
 export const successfulCreateInputByFieldMetadataType: {
   [K in Exclude<
@@ -134,10 +135,7 @@ export const successfulCreateInputByFieldMetadataType: {
         rawJsonField: {},
       },
       validateInput: (record: Record<string, any>) => {
-        return (
-          typeof record.rawJsonField === 'object' &&
-          Object.keys(record.rawJsonField).length === 0
-        );
+        return isEmptyObject(record.rawJsonField);
       },
     },
     {
@@ -145,10 +143,7 @@ export const successfulCreateInputByFieldMetadataType: {
         rawJsonField: null,
       },
       validateInput: (record: Record<string, any>) => {
-        return (
-          typeof record.rawJsonField === 'object' &&
-          Object.keys(record.rawJsonField).length === 0
-        );
+        return record.rawJsonField === null;
       },
     },
     {

packages/twenty-server/test/integration/graphql/suites/inputs-validation/filter-validation/constants/successful-filter-input-by-field-metadata-type.constant.ts

@@ -4,7 +4,7 @@ import {
   TEST_UUID_FIELD_VALUE,
 } from 'test/integration/graphql/suites/inputs-validation/utils/setup-test-objects-with-all-field-types.util';
 import { FieldMetadataType } from 'twenty-shared/types';
-import { isDefined, isEmptyObject } from 'twenty-shared/utils';
+import { isDefined } from 'twenty-shared/utils';
 
 export const successfulFilterInputByFieldMetadataType: {
   [K in FieldMetadataTypesToTestForFilterInputValidation]: {
@@ -895,7 +895,7 @@ export const successfulFilterInputByFieldMetadataType: {
       gqlFilterInput: { rawJsonField: { is: 'NULL' } },
       restFilterInput: 'rawJsonField[is]:NULL',
       validateFilter: (record: Record<string, any>) => {
-        return isEmptyObject(record.rawJsonField);
+        return record.rawJsonField === null;
       },
     },
     {