初始化

app/models/Document.php

@@ -0,0 +1,43 @@
+<?php
+namespace app\models;
+
+use core\base\Model;
+
+/**
+ * 文档管理模型
+ */
+class Document extends Model
+{
+    protected $table = 'document';
+
+    public function getAll()
+    {
+        return $this->order(['id DESC'])->fetchAll();
+    }
+
+    public function getById($id)
+    {
+        return $this->where(['id = :id'], [':id' => $id])->fetch();
+    }
+
+    public function getByCategory($category)
+    {
+        return $this->where(['category = :cat'], [':cat' => $category])->order(['id DESC'])->fetchAll();
+    }
+
+    public function getCount()
+    {
+        $sql = 'SELECT COUNT(*) AS cnt FROM ' . $this->getTable();
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute();
+        $row = $stmt->fetch();
+        return (int)($row['cnt'] ?? 0);
+    }
+
+    public function getCategories()
+    {
+        $sql = 'SELECT DISTINCT category FROM ' . $this->getTable() . " WHERE category != '' ORDER BY category";
+        $stmt = $this->pdo->query($sql);
+        return $stmt->fetchAll();
+    }
+}