fix: 解决支付宝小程序平台v-for部分情况key无效的问题

packages/uni-template-compiler/__tests__/compiler-mp-alipay.spec.js

@@ -18,7 +18,7 @@ describe('mp:compiler-mp-alipay', () => {
   it('generate v-for directive', () => {
     assertCodegen(
       '<view><view v-for="(item,index) in items" :key="index"></view></view>',
-      '<view><block a:for="{{items}}" a:for-item="item" a:for-index="index" a:key="index"><view></view></block></view>'
+      '<view><view a:for="{{items}}" a:for-item="item" a:for-index="index" a:key="index"></view></view>'
     )
   })
 
@@ -39,11 +39,11 @@ describe('mp:compiler-mp-alipay', () => {
     )
     assertCodegen(
       '<component1 v-for="item in items" ref="c3"></component1>',
-      '<block a:for="{{items}}" a:for-item="item" a:for-index="__i0__"><component1 vue-id="{{\'551070e6-1-\'+__i0__}}" ref="__r" data-ref-in-for="c3" onVueInit="__l"></component1></block>'
+      '<component1 vue-id="{{\'551070e6-1-\'+__i0__}}" ref="__r" data-ref-in-for="c3" a:for="{{items}}" a:for-item="item" a:for-index="__i0__" onVueInit="__l"></component1>'
     )
     assertCodegen(
       '<component1 v-for="item in items" :ref="c4"></component1>',
-      '<block a:for="{{items}}" a:for-item="item" a:for-index="__i0__"><component1 vue-id="{{\'551070e6-1-\'+__i0__}}" ref="__r" data-ref-in-for="{{c4}}" onVueInit="__l"></component1></block>'
+      '<component1 vue-id="{{\'551070e6-1-\'+__i0__}}" ref="__r" data-ref-in-for="{{c4}}" a:for="{{items}}" a:for-item="item" a:for-index="__i0__" onVueInit="__l"></component1>'
     )
   })
   it('generate default slot', () => {

packages/uni-template-compiler/lib/template/traverse.js

@@ -399,10 +399,17 @@ function traverseRenderList (callExprNode, state) {
     }
   }
 
+  const children = traverseExpr(forReturnStatementArgument, state)
+  // 支付宝小程序在 block 标签上使用 key 时顺序不能保障
+  if (state.options.platform.name === 'mp-alipay' && t.isCallExpression(forReturnStatementArgument) && children && children.type) {
+    children.attr = children.attr || {}
+    Object.assign(children.attr, attr)
+    return children
+  }
   return {
     type: 'block',
     attr,
-    children: normalizeChildren(traverseExpr(forReturnStatementArgument, state))
+    children: normalizeChildren(children)
   }
 }