更新

server/app/common/service/qywx/MediaChannelService.php

@@ -173,6 +173,53 @@ class MediaChannelService
         $query->whereRaw('(' . implode(' OR ', $segments) . ')', $bindings);
     }
 
+    /**
+     * Filter a fact table by its external_userid without joining the denormalized
+     * contact rows. The contact table may contain several rows for one customer;
+     * a normal JOIN therefore both scans follow_users TEXT repeatedly and
+     * multiplies facts. Enterprise tag channels use the normalized relation
+     * table, while legacy name-only channels keep a deduplicated JSON fallback.
+     *
+     * @param array<string, mixed>|null $channel
+     */
+    public static function applyExternalUserChannelFilter(Query $query, string $field, ?array $channel): void
+    {
+        if ($channel === null) {
+            return;
+        }
+
+        $tagId = trim((string) ($channel['source_tag_id'] ?? ''));
+        if ($tagId !== '') {
+            $tagTable = self::tableWithPrefix('qywx_external_contact_tag');
+            $query->whereRaw(
+                "{$field} IN (SELECT channel_tag.external_userid FROM {$tagTable} channel_tag WHERE channel_tag.tag_id = ?)",
+                [$tagId]
+            );
+
+            return;
+        }
+
+        $patterns = self::buildLikePatterns($channel);
+        if ($patterns === []) {
+            $query->whereRaw('1 = 0');
+
+            return;
+        }
+
+        $segments = [];
+        $bindings = [];
+        foreach ($patterns as $pattern) {
+            $segments[] = 'channel_contact.follow_users LIKE ?';
+            $bindings[] = $pattern;
+        }
+        $contactTable = self::tableWithPrefix('qywx_external_contact');
+        $query->whereRaw(
+            "{$field} IN (SELECT channel_contact.external_userid FROM {$contactTable} channel_contact"
+                . ' WHERE channel_contact.delete_time IS NULL AND (' . implode(' OR ', $segments) . '))',
+            $bindings
+        );
+    }
+
     /**
      * @return array{scanned_contacts: int, discovered_tags: int, inserted_or_updated: int}
      */
@@ -275,6 +322,13 @@ class MediaChannelService
         return array_values(array_unique($patterns));
     }
 
+    private static function tableWithPrefix(string $table): string
+    {
+        $prefix = (string) (Db::getConfig('connections.mysql.prefix') ?: 'zyt_');
+
+        return $prefix . $table;
+    }
+
     /**
      * @param array<int, mixed> $followUsers
      * @return array<int, array{source_tag_id: string, source_tag_name: string, source_group_name: string}>