vue中，一个列表页从列表详情页返回需要被缓存，从其他页面进入列表不需要缓存，我在main.js中设置

router.beforeEach((to, from, next) => {
    Vue.prototype.fromurl = from.path;
    Vue.prototype.tourl = to.meta;
    if(from.path.substr(3,4)=='shop'){
            var bostonetop = $(window).scrollTop();
            localStorage.setItem("bostonetop",bostonetop) 
     }
    else if(from.path.substr(3,13)=='special_field'){
            var bostonetop = $(window).scrollTop();
            localStorage.setItem("bostonetop",bostonetop) 
     }
    if (to.path.substr(3,4) =='shop') {
        if(from.path.substr(3,14)=='product_detail'){
          // 思路是进入列表页并从详情页返回加载缓存，其他不加载缓存
            to.meta.keepAlive = true;
            var bostonetop = localStorage.getItem("bostonetop") 
            $('html,body').animate({scrollTop:bostonetop}, 10);
        }
     } 
    else if (to.path.substr(3,13)=='special_field') {
        if(from.path.substr(3,14)=='product_detail'){
            to.meta.keepAlive = true;
            var bostonetop = localStorage.getItem("bostonetop") 
            $('html,body').animate({scrollTop:bostonetop}, 10);
        }
    }else{
         to.meta.keepAlive = false
     }
     next()
})

App.vue

<template>
  <div id="app">
    <keep-alive>
        <router-view v-if="$route.meta.keepAlive"></router-view>
    </keep-alive>
    <router-view v-if="!$route.meta.keepAlive"></router-view>
  </div>
</template>

router.js

 {
   path: '/t/shop',
   name: 'shop',
   component: shop,      
   meta: {
           keepAlive: true 
           }
  },

RT，思路是进入该列表页并从详情页返回加载缓存，其他不加载缓存。但是实际中所有页面进入该页面中都产生了缓存；这不是我想要的，请问上述问题应该如何解决？如何从其他页面进入该页面不加载缓存并从详情返回加载缓存？