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

app/Core/Database/LtPostgresConnection.php

@@ -0,0 +1,41 @@
+<?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;
+    }
+}