How to provide/inject into Vue root instance WITH nuxt and @vue/composition-api?

问题

I'm trying to use @vue/apollo-composable with my Nuxt-Ts application. This is the example how it should be injected into root instance on a "normal" Vue application:

import { provide } from '@vue/composition-api'
import { DefaultApolloClient } from '@vue/apollo-composable'

const app = new Vue({
  setup () {
    provide(DefaultApolloClient, apolloClient)
  },

  render: h => h(App),
})

Problem: I don't know how to get access to the root instance in Nuxt-TS.

I tried making a plugin, but it's injected either directly into the root instance (which is not right, because @vue/apollo-composable is using composition-api::provide() which creates it's own property _provided.

And if I use nuxt plugin's inject a $ get's concatenated. And if I write a _provided object directly in via ctx.app._provided = it doesn't stick.

import { DefaultApolloClient } from "@vue/apollo-composable";
const myPlugin: Plugin = (context, inject) => {
  const defaultClient = ctx.app.apolloProvider.defaultClient;
  inject(DefaultApolloClient.toString(), defaultClient) // results in $$ and also composition-api::inject is checking inside `_provided[DefaultApolloClient]`
}

export default myPlugin

I can't call provide() like in the original example, because it's only allowed inside a VueComponent::setup function.

I also tried creating a Component and just use it on the page I need it (kind of defeats the purpose of installing in root instance though)

const InstallGraphQl = createComponent({
  name: "InstallGraphQl",
  setup(_props, ctx: any) {
    debugger;
    const apolloClient = ctx.app.apolloProvider.defaultClient;
    ctx.provide(DefaultApolloClient, apolloClient);
  },
});
export default createComponent({
  name: "DefaultLayout",
  components: {
    InstallGraphQl
  },
  setup(_props, _ctx: SetupContext) {
    const { result } = useQuery(SharedLayoutQuery);
    return { result };
  },
});

but then setup of the exported components gets called before InstallGraphQl::setup...

Edit: Also for more information about @vue/apollo-composable see discussion here: https://github.com/vuejs/vue-apollo/issues/687

回答1:

Just set a setup() to the root options:

/* plugins/provide-apollo-client.js */

import {provide} from '@vue/composition-api'
import {DefaultApolloClient} from '@vue/apollo-composable'

export default function ({app}) {
  app.setup = () => {
    provide(DefaultApolloClient, ...)
  }

  // Or, use local mixin
  app.mixins = (app.mixins || []).concat({
    setup () {...},
  })
}

/* nuxt.config.js */

export default {
  plugins: ['~/plugins/provide-apollo-client'],
}

Not much familiar with nuxt-ts though, but I think the code should just work.

回答2:

I don't use nuxt-ts but i do have this setup in a nuxt application. In my default.vue template i provide like this.

<script>
  import { provide } from '@vue/composition-api';
  import { ApolloClients } from '@vue/apollo-composable'

  export default {
    setup(props, context) {
      provide(ApolloClients, {
        default: context.root.$apollo,
      })
    }
  }
</script>

Package versions are

"@vue/apollo-composable": "4.0.0-alpha.1"
"@vue/composition-api": "version": "0.3.4"

Apollo Setup

//apolloClient.js
import { ApolloClient } from 'apollo-client';
import { InMemoryCache } from 'apollo-cache-inmemory';
import link from './link';

export default function apolloClient(_, inject) {
  const cache = new InMemoryCache();

  const client = new ApolloClient({
    // Provide required constructor fields
    cache,
    link,
    // Provide some optional constructor fields
    name: 'apollo-client',
    queryDeduplication: false,
    defaultOptions: {
      watchQuery: {
        fetchPolicy: 'cache-and-network',
      },
    },
  });

  inject('apollo', client);
}

// link.js
import { split } from 'apollo-link';
import { HttpLink } from 'apollo-link-http';
import { WebSocketLink } from 'apollo-link-ws';
import { getMainDefinition } from 'apollo-utilities';
import fetch from 'unfetch';
const httpLink = new HttpLink({
  uri: 'http://localhost:8080/v1/graphql',
  credentials: 'same-origin',
  fetch,
});

const wsParams = {
  uri: `ws://localhost:8080/v1/graphql`,
  reconnect: true,
};

if (process.server) {
  wsParams.webSocketImpl = require('ws');
}

const wsLink = new WebSocketLink(wsParams);

// using the ability to split links, you can send data to each link
// depending on what kind of operation is being sent
const link = split(
  // split based on operation type
  ({ query }) => {
    const definition = getMainDefinition(query);
    return (
      definition.kind === 'OperationDefinition' &&
      definition.operation === 'subscription'
    );
  },
  wsLink,
  httpLink,
);

export default link;

Then with the above, you include apollo in your nuxtconfig as a plugin

  plugins: [
    '~/plugins/vue-composition-api',
    '~/plugins/apolloClient'
  ],

回答3:

There is now an official onGlobalSetup helper for this in nuxt-composition-api

According to the documentation, you simply use it in a plugin like so:

import { onGlobalSetup } from 'nuxt-composition-api'

export default () => {
  onGlobalSetup(() => {
    provide('globalKey', true)
  })
}

来源：https://stackoverflow.com/questions/59198021/how-to-provide-inject-into-vue-root-instance-with-nuxt-and-vue-composition-api

标签

typescript

nuxt.js

vue-apollo

vuejs3

vue-composition-api