Refresh changeset property when reopening briefcase (#6861)

common/changes/@itwin/core-backend/samw-reopen-refresh-changeset_2024-06-18-13-49.json

@@ -0,0 +1,10 @@
+{
+ "changes": [
+ {
+ "packageName": "@itwin/core-backend",
+ "comment": "BriefcaseDb.closeAndReopen now refreshes the changeset property in case another process pulled changes",
+ "type": "none"
+ }
+ ],
+ "packageName": "@itwin/core-backend"
+}

core/backend/src/IModelDb.ts

@@ -2946,7 +2946,7 @@ export class BriefcaseDb extends IModelDb {
  * Execute the supplied function.
  * If the briefcase was read-only, reopen the native briefcase as read-only.
  * @note this._openMode is not changed from its initial value.
- * @internal Exported strictly for tests.
+ * @internal Exported strictly for tests
  */
  public async executeWritable(func: () => Promise<void>): Promise<void> {
  const fileName = this.pathName;
@@ -2980,6 +2980,13 @@ export class BriefcaseDb extends IModelDb {
 
  // Restore the native db's pointer to this JavaScript object.
  this.nativeDb.setIModelDb(this);
+
+ // refresh cached properties that could have been changed by another process writing to the same briefcase
+ this.changeset = this.nativeDb.getCurrentChangeset();
+
+ // assert what should never change
+ if (this.iModelId !== this.nativeDb.getIModelId() || this.iTwinId !== this.nativeDb.getITwinId())
+ throw new Error("closeAndReopen detected change in iModelId and/or iTwinId");
  }
 
  /** Pull and apply changesets from iModelHub */