In Vue and Vue Router SPA, showing 404 for a not found resource

Question

I'm using Vue and Vue Router in a SPA. In a view component I query a repository for a resource. If the resource is not found I want to show a 404 page whilst keeping the URL.

I.e. if I visit /foo/non-existant-id then a 404 page should be shown in place of the show page for the foo resource.

For clarity here is my router map:

router.map({
  '/foo/:id': {name: 'foo-show', component: FooShowPage},

  // Utilities
  '/': { name: 'home', component: HomePage },
  '*': { name: '404', component: NotFoundPage }
})

And in my FooShowPage I do the following:

ready () {
  // fetch the foo from the repo (app.foos)
  app.foos.fetchById(this.$route.params.id).then(foo => {
    this.foo = foo
  }).catch(e => {
    // foo is not found show a 404 page
    // using this.$route.router.go({name: '404'}) does not work as route is a wildcard 
    console.warn(e)
  })
}

Essentially it would probably involve replacing the FooShowPage in the router view with NotFoundPage, or redirecting to a defined 404 page whilst keeping the browser history untouched.

Solution 1

You need to set a route for 404 page and then redirect unmatched routes to it. I use a router.redirect after the map to do such things.

router.map({
  '/': { name: 'home', component: HomePage },
  '/foo/:id': {name: 'foo-show', component: FooShowPage},
  '/404': {name: 'not-found', component: NotFound}
})

router.redirect({
    '*': '/404'
})

All routes that are NOT listed in the map will then be redirected to /404

Solution 2

Found a solution at Vue.js forum — use navigation guard:

import store from '../store'

{
  path: '/lavori/:lavoro',
  name: 'lavoro',
  component: Lavoro,
  beforeEnter: (to, from, next) => {
    function isValid (id) {
      return store.getters.resourceByID(id) !== undefined
    }

    if (!isValid(to.params.id)) {
      next({ name: 'not-found' });
    }    
    next();
  }
},

Edit1: need to import store to get access to getters, from this Github issue and this question

Still a question how to leave same (requested) URL