Qiita Teams that are logged in
You are not logged in to any team

Log in to Qiita Team
Community
OrganizationEventAdvent CalendarQiitadon (β)
Service
Qiita JobsQiita ZineQiita Blog
18
Help us understand the problem. What is going on with this article?

More than 3 years have passed since last update.

@naoiwata

Vue-router を使ったときに URL は変わったのに画面に反映されないとき

環境

vue v2.5.13
vue-router v3.0.1

ハマったこと

/#/items/aaa 画面内で /#/items/bbb へ遷移しようとすると、ブラウザの URL は切り替わるけど画面の View が反映されない。

元々実装していたソースコード

必要なとこだけ。... のとこは省略。

/#/items/aaa ページ内に items のリストリンクを表示して、 ページ内から /#/items/bbb へ遷移させる CRUD 画面あるあるの UI。

src/app.js
import Vue from "vue";
import router from "./router";

const vm = new Vue({
  el: "#app",
  router
});

export default vm;
src/router.js
import Vue from "vue";
import VueRouter from "vue-router";

Vue.use(VueRouter);

const routes = [
  {
    name: "top",
    path: "/",
    component: require("../container/top.vue")
  },
  {
    path: "/items",
    component: require("../container/items-list.vue")
  },
  {
    path: "/items/:id",
    component: require("../container/items-detail.vue")
  },
  ...
  {
    path: "*",
    redirect: {name: "top"},
  }
];

const router = new VueRouter({
  routes
});

export default router;
src/conainer/items-detail.vue
<template>
  ...
  <items-detail :id="$route.params.id"></items-detail>
  <items-pickup></items-pickup>
  ...
</template>

<script>
import itemsDetail from "../components/items-detail.vue";
import itemsPickup from "../components/items-pickup.vue";
...

export default {
  created() {
    ...
  },
  data() {
    return {
        ...
    };
  },
  components: {
    "items-detail": itemsDetail,
    "items-pickup": itemsPickup,
    ...
  }
};
</script>
src/components/items-pickup.vue
<template>
  ...
  <router-link v-for="item in items" :to="'/items/'+item.id" tag="a">{{item.name}}</router-link>
  ...
</template>

<script>
export default {
  created() {
    ...
  },
  data() {
    return {
      items: {
        id: "aaa",
        name: "ぺーじそのいち"
      },
      {
        id: "bbb",
        name: "ぺーじそのに"
      },
      {
        id: "ccc",
        name: "ぺーじそのさん"
      }
    };
  }
};
</script>

解決策

Vue2.2 で追加された beforeRouteUpdate 関数を使って画面を再描画する処理を入れる。
beforeRouteUpdate 関数を使うことで、そのコンポーネントを描画するルートが変更されたときに呼び出され、新しいルートで再利用される。(※1)

変更後のソースコード

src/conainer/items-detail.vue
<template>
  ...
  <items-detail :id="$route.params.id" ref="items"></items-detail> // 追記
  <items-pickup></items-pickup>
  ...
</template>

<script>
import itemsDetail from "../components/items-detail.vue";
import itemsPickup from "../components/items-pickup.vue";
...

export default {
  created() {
    ...
  },
  data() {
    return {
        ...
    };
  },
  components: {
    "items-detail": itemsDetail,
    "items-pickup": itemsPickup,
    ...
  },
  // 追記
  beforeRouteUpdate (to, from, next) {
    // URL の id が変わったときに src/components/items-detail.vue の updateItem 関数を実行してモデルを更新する
    this.$refs.items.updateItem();
    next();
  }
};
</script>
src/components/items-detail.vue
<template>
  ...
</template>
<script>
export default {
  created() {
    ...
  },
  props: {
    id: String
  },
  data() {
    return {
      item: {}
    };
  },
  methods: {
    updateItem() {
      // URL の id の値を元に紐づくデータを取得して返す関数
      return getCurrentItem(this.$route.params.id);
    },
    ...
};
</script>

Reference

※1) https://router.vuejs.org/ja/advanced/navigation-guards.html

18
Help us understand the problem. What is going on with this article?
Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
18
Help us understand the problem. What is going on with this article?