Morph relation : migration builder (#13173)

This PR will create the migration to be run for the morph relations

- We created a dedicated util to generate the column name and refactored
a little the code in order to have less dependencies and a clearer devX
(updated the snapshot that changed because of this)
- Moved the `createMigrationActions` to its own util as well
- Created the `MorphRelationColumnActionFactory` based on the relation
one

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/metadata-modules/workspace-migration/factories/morph-relation-column-action.factory.ts

@@ -3,30 +3,93 @@ import { Injectable, Logger } from '@nestjs/common';
 import { FieldMetadataType } from 'twenty-shared/types';
 
 import { FieldMetadataInterface } from 'src/engine/metadata-modules/field-metadata/interfaces/field-metadata.interface';
+import { RelationType } from 'src/engine/metadata-modules/field-metadata/interfaces/relation-type.interface';
 import { WorkspaceColumnActionOptions } from 'src/engine/metadata-modules/workspace-migration/interfaces/workspace-column-action-options.interface';
 
 import { ColumnActionAbstractFactory } from 'src/engine/metadata-modules/workspace-migration/factories/column-action-abstract.factory';
+import { fieldMetadataTypeToColumnType } from 'src/engine/metadata-modules/workspace-migration/utils/field-metadata-type-to-column-type.util';
 import {
+  WorkspaceMigrationColumnActionType,
   WorkspaceMigrationColumnAlter,
   WorkspaceMigrationColumnCreate,
 } from 'src/engine/metadata-modules/workspace-migration/workspace-migration.entity';
+import {
+  WorkspaceMigrationException,
+  WorkspaceMigrationExceptionCode,
+} from 'src/engine/metadata-modules/workspace-migration/workspace-migration.exception';
 
 @Injectable()
 export class MorphRelationColumnActionFactory extends ColumnActionAbstractFactory<FieldMetadataType.MORPH_RELATION> {
   protected readonly logger = new Logger(MorphRelationColumnActionFactory.name);
 
   protected handleCreateAction(
-    _fieldMetadata: FieldMetadataInterface<FieldMetadataType.MORPH_RELATION>,
+    fieldMetadata: FieldMetadataInterface<FieldMetadataType.MORPH_RELATION>,
     _options?: WorkspaceColumnActionOptions,
   ): WorkspaceMigrationColumnCreate[] {
-    return [];
+    if (!fieldMetadata.settings || !fieldMetadata.settings.joinColumnName) {
+      return [];
+    }
+
+    const joinColumnName = fieldMetadata.settings.joinColumnName;
+
+    return [
+      {
+        action: WorkspaceMigrationColumnActionType.CREATE,
+        columnName: joinColumnName,
+        columnType: fieldMetadataTypeToColumnType(FieldMetadataType.UUID),
+        isArray: false,
+        isNullable: fieldMetadata.isNullable ?? true,
+        isUnique: false,
+        defaultValue: null,
+      },
+    ];
   }
 
   protected handleAlterAction(
-    _currentFieldMetadata: FieldMetadataInterface<FieldMetadataType.MORPH_RELATION>,
-    _alteredFieldMetadata: FieldMetadataInterface<FieldMetadataType.MORPH_RELATION>,
+    currentFieldMetadata: FieldMetadataInterface<FieldMetadataType.MORPH_RELATION>,
+    alteredFieldMetadata: FieldMetadataInterface<FieldMetadataType.MORPH_RELATION>,
     _options?: WorkspaceColumnActionOptions,
   ): WorkspaceMigrationColumnAlter[] {
-    return [];
+    if (!currentFieldMetadata.settings || !alteredFieldMetadata.settings) {
+      return [];
+    }
+
+    if (
+      currentFieldMetadata.settings.relationType === RelationType.ONE_TO_MANY
+    ) {
+      return [];
+    }
+
+    const currentJoinColumnName = currentFieldMetadata.settings.joinColumnName;
+    const alteredJoinColumnName = alteredFieldMetadata.settings.joinColumnName;
+
+    if (!currentJoinColumnName || !alteredJoinColumnName) {
+      throw new WorkspaceMigrationException(
+        `Column name not found for current or altered field metadata`,
+        WorkspaceMigrationExceptionCode.INVALID_FIELD_METADATA,
+      );
+    }
+
+    return [
+      {
+        action: WorkspaceMigrationColumnActionType.ALTER,
+        currentColumnDefinition: {
+          columnName: currentJoinColumnName,
+          columnType: fieldMetadataTypeToColumnType(FieldMetadataType.UUID),
+          isArray: false,
+          isNullable: currentFieldMetadata.isNullable ?? true,
+          isUnique: false,
+          defaultValue: null,
+        },
+        alteredColumnDefinition: {
+          columnName: alteredJoinColumnName,
+          columnType: fieldMetadataTypeToColumnType(FieldMetadataType.UUID),
+          isArray: false,
+          isNullable: alteredFieldMetadata.isNullable ?? true,
+          isUnique: false,
+          defaultValue: null,
+        },
+      },
+    ];
   }
 }