Rework relations (#3431)

* Rework relations

* Fix tests

packages/twenty-server/src/core/api-rest/api-rest-query-builder/factories/input-factories/__tests__/filter-input.factory.spec.ts

@@ -35,7 +35,7 @@ describe('FilterInputFactory', () => {
       };
 
       expect(() => service.create(request, objectMetadata)).toThrow(
-        "field 'wrongField' does not exist in 'testingObject' object",
+        "field 'wrongField' does not exist in 'objectName' object",
       );
     });
 

packages/twenty-server/src/core/api-rest/api-rest-query-builder/factories/input-factories/__tests__/order-by-input.factory.spec.ts

@@ -112,7 +112,7 @@ describe('OrderByInputFactory', () => {
       };
 
       expect(() => service.create(request, objectMetadata)).toThrow(
-        "field 'wrongField' does not exist in 'testingObject' object",
+        "field 'wrongField' does not exist in 'objectName' object",
       );
     });
   });

packages/twenty-server/src/core/api-rest/api-rest-query-builder/utils/fields.utils.ts

@@ -1,6 +1,7 @@
 import { BadRequestException } from '@nestjs/common';
 
 import { FieldMetadataType } from 'src/metadata/field-metadata/field-metadata.entity';
+import { computeObjectTargetTable } from 'src/workspace/utils/compute-object-target-table.util';
 
 export const getFieldType = (
   objectMetadataItem,
@@ -28,7 +29,9 @@ export const checkFields = (objectMetadataItem, fieldNames): void => {
         .includes(fieldName)
     ) {
       throw new BadRequestException(
-        `field '${fieldName}' does not exist in '${objectMetadataItem.targetTableName}' object`,
+        `field '${fieldName}' does not exist in '${computeObjectTargetTable(
+          objectMetadataItem,
+        )}' object`,
       );
     }
   }