fix(mp): nested slots v-for (#3587)

packages/uni-mp-compiler/__tests__/scopedSlot.spec.ts

@@ -25,6 +25,24 @@ describe('compiler: transform scoped slots', () => {
       `<view><slot wx:if="{{a}}" name="header"/></view>`,
       `(_ctx, _cache) => {
   return _e({ a: _ctx.ok }, _ctx.ok ? { b: _r("header", { item: _ctx.item, index: _ctx.index }) } : {})
+}`
+    )
+  })
+  test('v-for + v-for + scoped slots', () => {
+    assert(
+      `<view v-for="(item, index) in 4" :key="index"><view v-for="(item, index) in 4"><slot :text="1"></slot></view></view>`,
+      `<view wx:for="{{a}}" wx:for-item="item" wx:key="b"><view wx:for="{{item.a}}" wx:for-item="item"><slot name="{{item.a}}"></slot></view></view>`,
+      `(_ctx, _cache) => {
+  return { a: _f(4, (item, index, i0) => { return { a: _f(4, (item, index, i1) => { return { a: "d-" + i0 + '-' + i1, b: _r("d", { text: 1 }, i0 + '-' + i1) }; }), b: index }; }) }
+}`
+    )
+  })
+  test('v-for + v-for + v-for + scoped slots', () => {
+    assert(
+      `<view v-for="(item, index) in 4" :key="index"><view v-for="(item, index) in 4"><view v-for="(item, index) in 4"><slot :text="1"></slot></view></view></view>`,
+      `<view wx:for="{{a}}" wx:for-item="item" wx:key="b"><view wx:for="{{item.a}}" wx:for-item="item"><view wx:for="{{item.a}}" wx:for-item="item"><slot name="{{item.a}}"></slot></view></view></view>`,
+      `(_ctx, _cache) => {
+  return { a: _f(4, (item, index, i0) => { return { a: _f(4, (item, index, i1) => { return { a: _f(4, (item, index, i2) => { return { a: "d-" + i0 + '-' + i1 + '-' + i2, b: _r("d", { text: 1 }, i0 + '-' + i1 + '-' + i2) }; }) }; }), b: index }; }) }
 }`
     )
   })

packages/uni-mp-compiler/__tests__/slot.spec.ts

@@ -99,7 +99,7 @@ describe('compiler: transform slot', () => {
       `<view v-for="(item,index) in items" :key="index"><slot v-for="(item1,index1) in item.list" :key="index1"></slot></view>`,
       `<view wx:for="{{a}}" wx:for-item="item" wx:key="b"><slot wx:for="{{item.a}}" wx:for-item="item1" name="{{item1.a}}"></slot></view>`,
       `(_ctx, _cache) => {
-  return { a: _f(_ctx.items, (item, index, i0) => { return { a: _f(item.list, (item1, index1, i1) => { return { a: "d-" + i0 + '-' + i1, b: _r("d", { key: index1 }, i1) }; }), b: index }; }) }
+  return { a: _f(_ctx.items, (item, index, i0) => { return { a: _f(item.list, (item1, index1, i1) => { return { a: "d-" + i0 + '-' + i1, b: _r("d", { key: index1 }, i0 + '-' + i1) }; }), b: index }; }) }
 }`
     )
   })

packages/uni-mp-compiler/src/transforms/transformSlot.ts

@@ -97,7 +97,7 @@ export function rewriteSlot(node: SlotOutletNode, context: TransformContext) {
           slotName,
           ',',
           `{${properties.join(',')}}`,
-          `${vForIndexAlias ? ',' + vForIndexAlias : ''}`,
+          `${vForIndexAlias ? ',' + parseScopedSlotKey(context) : ''}`,
           ')',
         ]),
         context

packages/uni-mp-vue/lib/vue.runtime.esm.js

@@ -4989,7 +4989,7 @@ function componentUpdateScopedSlotsFn() {
     const diffData = Object.create(null);
     scopedSlotsData.forEach(({ path, index, data }) => {
         const oldScopedSlotData = getValueByDataPath(oldData, path);
-        const diffPath = `${path}[${index}]`;
+        const diffPath = isString(index) ? `${path}.${index}` : `${path}[${index}]`;
         if (typeof oldScopedSlotData === 'undefined' ||
             typeof oldScopedSlotData[index] === 'undefined') {
             diffData[diffPath] = data;