Fix next step ids backfill command (#11769)

Twenty prod DB has been exported for testing.

Main updates:
- do not process workflow runs with less than 2 steps. Nothing to do.
- update runs by batches of 500. Will avoid java heap space issue
- add more logs

packages/twenty-server/src/database/commands/upgrade-version-command/0-52/0-52-backfill-workflow-next-step-ids.command.ts

@@ -49,7 +49,10 @@ export class BackfillWorkflowNextStepIdsCommand extends ActiveOrSuspendedWorkspa
 
     const workflowVersions = await workflowVersionRepository.find();
 
+    this.logger.log(`Number of workflow versions: ${workflowVersions.length}`);
+
     for (const workflowVersion of workflowVersions) {
+      this.logger.log(`Processing workflow version: ${workflowVersion.id}`);
       const updatedSteps: WorkflowVersionWorkspaceEntity['steps'] = [];
       const workflowSteps = workflowVersion.steps;
 
@@ -58,59 +61,83 @@ export class BackfillWorkflowNextStepIdsCommand extends ActiveOrSuspendedWorkspa
       }
 
       // for each step, add the next step id which is the next index
-      for (let i = 0; i < workflowSteps.length; i++) {
+      for (let stepIndex = 0; stepIndex < workflowSteps.length; stepIndex++) {
         const updatedStep = {
-          ...workflowSteps[i],
+          ...workflowSteps[stepIndex],
           nextStepIds:
-            i < workflowSteps.length - 1 && workflowSteps[i + 1]?.id
-              ? [workflowSteps[i + 1].id]
+            stepIndex < workflowSteps.length - 1 &&
+            workflowSteps[stepIndex + 1]?.id
+              ? [workflowSteps[stepIndex + 1].id]
               : undefined,
         };
 
         updatedSteps.push(updatedStep);
       }
 
-      // update workflow run flows
-      const workflowRuns = await workflowRunRepository.find({
+      // update workflow run flows by batch of 500
+      const batchSize = 500;
+      const totalWorkflowRuns = await workflowRunRepository.count({
         where: {
           workflowVersionId: workflowVersion.id,
         },
       });
 
-      const workflowRunsToUpdate: WorkflowRunWorkspaceEntity[] = [];
+      const totalBatches = Math.ceil(totalWorkflowRuns / batchSize);
 
-      for (const workflowRun of workflowRuns) {
-        const flow = workflowRun.output?.flow;
+      this.logger.log(`Total batches: ${totalBatches}`);
 
-        if (!flow?.steps) {
-          continue;
-        }
+      for (let batchIndex = 0; batchIndex < totalBatches; batchIndex++) {
+        const updatedWorkflowRuns: WorkflowRunWorkspaceEntity[] = [];
 
-        const updatedFlow = flow.steps.map((step) => {
-          const updatedStep = updatedSteps.find((s) => s.id === step.id);
-
-          return {
-            ...step,
-            nextStepIds: updatedStep?.nextStepIds,
-          };
+        this.logger.log(`Processing batch ${batchIndex + 1}/${totalBatches}`);
+        const workflowRuns = await workflowRunRepository.find({
+          where: {
+            workflowVersionId: workflowVersion.id,
+          },
+          take: batchSize,
+          skip: batchIndex * batchSize,
+          order: {
+            id: 'ASC',
+          },
         });
 
-        const updatedWorkflowRun: WorkflowRunWorkspaceEntity = {
-          ...workflowRun,
-          output: {
-            ...workflowRun.output,
-            flow: {
-              trigger: workflowRun.output?.flow?.trigger as WorkflowTrigger,
-              steps: updatedFlow,
+        for (const workflowRun of workflowRuns) {
+          const flow = workflowRun.output?.flow;
+
+          if (!flow?.steps || flow.steps.length < 2) {
+            continue;
+          }
+
+          const updatedStepsMap = new Map(
+            updatedSteps.map((step) => [step.id, step]),
+          );
+
+          const updatedFlow = flow.steps.map((step) => {
+            const updatedStep = updatedStepsMap.get(step.id);
+
+            return {
+              ...step,
+              nextStepIds: updatedStep?.nextStepIds,
+            };
+          });
+
+          const updatedWorkflowRun: WorkflowRunWorkspaceEntity = {
+            ...workflowRun,
+            output: {
+              ...workflowRun.output,
+              flow: {
+                trigger: workflowRun.output?.flow?.trigger as WorkflowTrigger,
+                steps: updatedFlow,
+              },
             },
-          },
-        };
+          };
 
-        workflowRunsToUpdate.push(updatedWorkflowRun);
+          updatedWorkflowRuns.push(updatedWorkflowRun);
+        }
+
+        await workflowRunRepository.save(updatedWorkflowRuns);
       }
 
-      await workflowRunRepository.save(workflowRunsToUpdate);
-
       await workflowVersionRepository.save({
         ...workflowVersion,
         steps: updatedSteps,