fix: enforce drainage uniqueness and carrier-specific reporting

api/src/report-materials/channel-export.service.ts

@@ -71,47 +71,48 @@ export class ReportChannelExportService {
             : missing.length
               ? `缺少字段：${missing.map((field) => field.exportName || field.name).join('、')}`
               : null;
-        const reportCarriers =
-          reportType === 'signature'
-            ? item.eligibleTargets
-                .filter((target) => target.channelId === channelId)
-                .map((target) => target.carrier as 'mobile' | 'unicom' | 'telecom')
-            : [null];
+        const reportCarriers = item.eligibleTargets
+          .filter((target) => target.channelId === channelId)
+          .map((target) => target.carrier as 'mobile' | 'unicom' | 'telecom');
         const tasks: Array<{ task: { id: string; reason: string | null }; existingTask: { status: string } | null }> =
           [];
         for (const carrier of reportCarriers) {
-          const existingTask = await this.prisma.channelSignatureReportTask.findFirst({
-            where: {
-              signatureId: item.signature.id,
-              channelId,
-              carrier,
-              reportType,
-              drainageItemId: reportType === 'drainage' ? item.drainageInfo!.id : null,
-            },
+          const entry = await this.prisma.$transaction(async (tx) => {
+            await tx.$executeRaw`SELECT pg_advisory_xact_lock(hashtextextended(${item.signature.id}, 910))`;
+            const existingTask = await tx.channelSignatureReportTask.findFirst({
+              where: {
+                signatureId: item.signature.id,
+                channelId,
+                carrier,
+                reportType,
+                drainageItemId: reportType === 'drainage' ? item.drainageInfo!.id : null,
+              },
+            });
+            const task = existingTask
+              ? await tx.channelSignatureReportTask.update({
+                  where: { id: existingTask.id },
+                  data: {
+                    status: missingReason ? 'waiting_material' : 'exporting',
+                    reason: missingReason,
+                    approvedAt: null,
+                  },
+                })
+              : await tx.channelSignatureReportTask.create({
+                  data: {
+                    tenantId: item.signature.tenantId,
+                    signatureId: item.signature.id,
+                    channelId,
+                    carrier,
+                    approvalScope: 'carrier_specific',
+                    reportType,
+                    drainageItemId: item.drainageInfo?.id,
+                    status: missingReason ? 'waiting_material' : 'exporting',
+                    reason: missingReason,
+                  },
+                });
+            return { task, existingTask };
           });
-          const task = existingTask
-            ? await this.prisma.channelSignatureReportTask.update({
-                where: { id: existingTask.id },
-                data: {
-                  status: missingReason ? 'waiting_material' : 'exporting',
-                  reason: missingReason,
-                  ...(reportType === 'signature' ? { approvedAt: null } : {}),
-                },
-              })
-            : await this.prisma.channelSignatureReportTask.create({
-                data: {
-                  tenantId: item.signature.tenantId,
-                  signatureId: item.signature.id,
-                  channelId,
-                  carrier,
-                  approvalScope: reportType === 'signature' ? 'carrier_specific' : 'legacy_channel',
-                  reportType,
-                  drainageItemId: item.drainageInfo?.id,
-                  status: missingReason ? 'waiting_material' : 'exporting',
-                  reason: missingReason,
-                },
-              });
-          tasks.push({ task, existingTask });
+          tasks.push(entry);
         }
         const task = tasks[0].task;
         if (missingReason) {