perf: Update the Paginator class

Author: amisadmin

fastapi_amis_admin/crud/_sqlalchemy.py

@@ -512,14 +512,14 @@ async def route(
                 data.filters = await self.on_filter_pre(request, filters)
                 if data.filters:
                     sel = sel.filter(*self.calc_filter_clause(data.filters))
-            if paginator.show_total:
+            if paginator.showTotal:
                 data.total = await self.db.async_scalar(sel.with_only_columns(func.count("*")))
                 if data.total == 0:
                     return BaseApiOut(data=data)
             orderBy = self._calc_ordering(paginator.orderBy, paginator.orderDir)
             if orderBy:
                 sel = sel.order_by(*orderBy)
-            sel = sel.limit(paginator.perPage).offset((paginator.page - 1) * paginator.perPage)
+            sel = sel.limit(paginator.perPage).offset(paginator.offset)
             result = await self.db.async_execute(sel)
             return BaseApiOut(data=await self.on_list_after(request, result, data))
 

fastapi_amis_admin/crud/schema.py

@@ -1,5 +1,6 @@
 from enum import Enum
 from typing import Any, Dict, Generic, List, Optional, TypeVar, Union
+from warnings import warn
 
 from fastapi_amis_admin.utils.pydantic import AllowExtraModelMixin, GenericModel
 
@@ -46,7 +47,7 @@ def __call__(
         self,
         page: Union[int, str] = 1,
         perPage: Union[int, str] = None,
-        show_total: int = 1,
+        showTotal: bool = True,
         orderBy: str = None,
         orderDir: str = "asc",
     ):
@@ -56,7 +57,20 @@ def __call__(
         self.perPage = perPage if perPage > 0 else self.perPageDefault
         if self.perPageMax:
             self.perPage = min(self.perPage, self.perPageMax)
-        self.show_total = show_total
+        self.showTotal = showTotal
         self.orderBy = orderBy
         self.orderDir = orderDir
         return self
+
+    @property
+    def offset(self):
+        return (self.page - 1) * self.perPage
+
+    @property
+    def limit(self):
+        return self.perPage
+
+    @property
+    def show_total(self):
+        warn("show_total is deprecated, use showTotal instead", DeprecationWarning, stacklevel=1)
+        return self.showTotal