OneBot: Leantime 改造版源码（BOM/Univer 表格/AI 接管/品牌替换等）

app/Core/Database/DatabaseManager.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Leantime\Core\Database;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
+
+class DatabaseManager
+{
+    /**
+     * Switch the database connection to use the given configuration.
+     *
+     * @param  array  $config  Database configuration with keys: dbHost, dbDatabase, dbUser, dbPassword
+     */
+    public static function switchConnection(array $config): void
+    {
+        try {
+            $connectionName = config('database.default', 'mysql');
+
+            // Purge existing connections
+            DB::purge($connectionName);
+
+            // Update the configuration
+            config([
+                "database.connections.{$connectionName}.host" => $config['dbHost'],
+                "database.connections.{$connectionName}.database" => $config['dbDatabase'],
+                "database.connections.{$connectionName}.username" => $config['dbUser'],
+                "database.connections.{$connectionName}.password" => $config['dbPassword'],
+            ]);
+
+            // Reconnect with new configuration
+            DB::reconnect($connectionName);
+
+            // Verify connection
+            DB::connection($connectionName)->getPdo();
+
+        } catch (\Exception $e) {
+            Log::error('Database connection failed: '.$e->getMessage());
+            throw new \RuntimeException('Failed to establish database connection: '.$e->getMessage());
+        }
+    }
+}

app/Core/Database/DatabaseServiceProvider.php

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+<?php
+
+namespace Leantime\Core\Database;
+
+use Illuminate\Database\Connection;
+use Illuminate\Database\DatabaseServiceProvider as LaravelDatabaseServiceProvider;
+
+class DatabaseServiceProvider extends LaravelDatabaseServiceProvider
+{
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        // Register Laravel's database service first
+        parent::register();
+
+        // Register custom PostgreSQL connection that handles empty-string-to-null conversion.
+        // MySQL silently coerces '' to NULL/zero for non-string columns; PostgreSQL does not.
+        Connection::resolverFor('pgsql', function ($connection, $database, $prefix, $config) {
+            return new LtPostgresConnection($connection, $database, $prefix, $config);
+        });
+
+        // Register Db as a singleton with proper dependency injection
+        app()->singleton(\Leantime\Core\Db\Db::class, function ($app) {
+            return new \Leantime\Core\Db\Db($app);
+        });
+    }
+}

app/Core/Database/LtPostgresConnection.php

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+<?php
+
+namespace Leantime\Core\Database;
+
+use Illuminate\Database\PostgresConnection;
+
+/**
+ * Custom PostgreSQL connection that handles MySQL-isms in the Leantime codebase.
+ *
+ * MySQL silently coerces empty strings to appropriate zero/null values for
+ * non-string column types (datetime, integer, float). PostgreSQL does not.
+ * This connection class converts empty string bindings to null so that
+ * existing repository code works without modification on PostgreSQL.
+ *
+ * String columns that legitimately need empty strings should be defined as
+ * nullable() in the SchemaBuilder so they accept null gracefully.
+ */
+class LtPostgresConnection extends PostgresConnection
+{
+    /**
+     * Prepare the query bindings for execution.
+     *
+     * Converts empty strings to null for PostgreSQL compatibility.
+     * MySQL treats '' as NULL/zero for datetime, int, and float columns,
+     * but PostgreSQL rejects them with type errors.
+     *
+     * @return array
+     */
+    public function prepareBindings(array $bindings)
+    {
+        $bindings = parent::prepareBindings($bindings);
+
+        foreach ($bindings as $key => $value) {
+            if ($value === '') {
+                $bindings[$key] = null;
+            }
+        }
+
+        return $bindings;
+    }
+}