add first commit

example/router/count.py

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+import modelvault
+
+from chongming_worker import rpc_method
+
+from ..models.pydantic import CountGetResponse
+from ..models.counter import Counter
+
+
+@rpc_method(
+    subject="example.count",
+    method="GET",
+    summary="Increment and get counter value",
+    response_model=CountGetResponse,  # 需要定义 CountResponse
+)
+async def count_get() -> CountGetResponse:
+    from ..global_var import db
+    
+    # 确保数据库已初始化（如果未初始化，则同步初始化，但这里假设已就绪）
+    if db is None:
+        raise RuntimeError("Database not initialized")
+
+    counters = modelvault.models.async_collection(db, Counter) # type: ignore
+    async with db.transaction():
+        counter = await counters.get("visits")
+        if counter is None:
+            counter = Counter(name="visits", value=0)
+            await counters.insert(counter)
+        else:
+            new_value = counter.value + 1
+            await counters.update("visits", {"value": new_value})
+            counter.value = new_value  # 更新本地对象以便返回
+
+    return CountGetResponse(name=counter.name, value=counter.value) # type: ignore