Ensure the create service opens a new changeset

frontend/src/app/components/wp-edit-form/work-package-editing-service.ts

@@ -154,6 +154,18 @@ export class WorkPackageEditingService extends StateCacheService<WorkPackageChan
     this.clearSome(change.workPackageId);
   }
 
+  /**
+   * Create a new changeset for the given work package, discarding any previous changeset that might exist
+   * @param workPackage
+   * @param form
+   */
+  public edit(workPackage:WorkPackageResource, form?:FormResource):WorkPackageChangeset {
+    const state = this.multiState.get(workPackage.id!);
+    const changeset = new WorkPackageChangeset(workPackage, state, form);
+
+    state.putValue(changeset);
+    return changeset;
+  }
 
   /**
    * Start or continue editing the work package with a given edit context
@@ -161,7 +173,7 @@ export class WorkPackageEditingService extends StateCacheService<WorkPackageChan
    * @param {form:FormResource} Initialize with an existing form
    * @return {WorkPackageChangeset} Change object to work on
    */
-  public changeFor(fallback:WorkPackageResource, form?:FormResource):WorkPackageChangeset {
+  public changeFor(fallback:WorkPackageResource):WorkPackageChangeset {
     const state = this.multiState.get(fallback.id!);
     const workPackage = this.wpCacheService.state(fallback.id!).getValueOr(fallback);
     let changeset = state.value;
@@ -170,9 +182,7 @@ export class WorkPackageEditingService extends StateCacheService<WorkPackageChan
     // If there is an empty one for a older work package reference
     // build a new changeset
     if (!changeset || (changeset.isEmpty() && changeset.pristineResource.lockVersion < workPackage.lockVersion)) {
-      changeset = new WorkPackageChangeset(workPackage, state, form)
-      state.putValue(changeset);
-      return changeset;
+      return this.edit(workPackage);
     }
 
     const change = state.value!;

frontend/src/app/components/wp-new/wp-create.service.ts

@@ -97,7 +97,7 @@ export class WorkPackageCreateService implements OnDestroy {
     let wp = this.halResourceService.createHalResourceOfType<WorkPackageResource>('WorkPackage', form.payload.$plain());
     wp.initializeNewResource(form);
 
-    const change = this.wpEditing.changeFor(wp, form);
+    const change = this.wpEditing.edit(wp, form);
 
     // Call work package initialization hook
     this.hooks.call('workPackageNewInitialization', change);
@@ -128,7 +128,7 @@ export class WorkPackageCreateService implements OnDestroy {
 
     wp.initializeNewResource(form);
 
-    return this.wpEditing.changeFor(wp, form);
+    return this.wpEditing.edit(wp, form);
   }
 
 

frontend/src/app/modules/fields/changeset/resource-changeset.ts

@@ -74,14 +74,14 @@ export abstract class ResourceChangeset<T extends HalResource|{ [key:string]:unk
    */
   public value(key:string) {
     if (this.isOverridden(key)) {
-      return this.changes[key];
+      return this.changeset.get(key);
     } else {
       return this.pristineResource[key];
     }
   }
 
   public setValue(key:string, val:any) {
-    this.changes[key] = val;
+    this.changeset.set(key, val);
   }
 
   public getSchemaName(attribute:string):string {