feat: multi diagrams

database/migrations/2026_04_06_082621_rename_diagram_url_to_diagram_urls_on_terminals_table.php

@@ -0,0 +1,53 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('terminals', function (Blueprint $table) {
+            $table->renameColumn('diagram_url', 'diagram_urls');
+        });
+
+        // Migrate existing string URLs to JSON array format
+        DB::table('terminals')->whereNotNull('diagram_urls')->orderBy('id')->each(function ($terminal) {
+            $decoded = json_decode($terminal->diagram_urls, true);
+            if (is_array($decoded)) {
+                return; // Already JSON, skip
+            }
+
+            DB::table('terminals')->where('id', $terminal->id)->update([
+                'diagram_urls' => json_encode([['title' => '默认组态', 'url' => $terminal->diagram_urls]]),
+            ]);
+        });
+
+        Schema::table('terminals', function (Blueprint $table) {
+            $table->json('diagram_urls')->nullable()->comment('组态界面地址')->change();
+        });
+    }
+
+    public function down(): void
+    {
+        // Extract first URL back to string
+        DB::table('terminals')->whereNotNull('diagram_urls')->orderBy('id')->each(function ($terminal) {
+            $decoded = json_decode($terminal->diagram_urls, true);
+            $url = is_array($decoded) ? ($decoded[0]['url'] ?? null) : $terminal->diagram_urls;
+
+            DB::table('terminals')->where('id', $terminal->id)->update([
+                'diagram_urls' => $url,
+            ]);
+        });
+
+        Schema::table('terminals', function (Blueprint $table) {
+            $table->string('diagram_urls', 500)->nullable()->comment('组态界面地址')->change();
+        });
+
+        Schema::table('terminals', function (Blueprint $table) {
+            $table->renameColumn('diagram_urls', 'diagram_url');
+        });
+    }
+};