[SSR] Rendering of Components with inline string template crashes

[ma-jahn]

Describe the bug
After upgrading from 3.0.0 to 3.0.2 i found that the rendering of our dynamic components is broken. It looks like it was caused by a change in 3.0.1 (#852).
If a component doesn't have an explicit render function, it will brake when executing render.call (mixin.js line 156).
This bug was also mentioned by @drewbaker here: e6cbaa2

To Reproduce
Create a view with a dynamic component

<template>
  <TemplateLiteralComponent/>
</template>

<script>
export default {
  name: 'BugReport',
  components: {
    TemplateLiteralComponent,
  },
  apollo: {
    something: {
       query: someQuery.gql,
    }
  },
}
</script>

And use a component that doesn't have a render function

<script>
export default {
  name: 'TemplateLiteralComponent',
  template: '<h3>TemplateLiteralComponent</h3>',
}
</script>

Expected behavior
This should render Test inside a div.cms-content.

Versions
vue: 2.6.10
vue-apollo: 3.0.2

[LinusBorg]

Your computed property is weird, it registers a global component (which is a side-effect that computed properties should not do), and doesn't return anything, so it will always evaluate to false

If that's the code you actually use, I don't see how it could have ever worked, and I don't see how this is related to vue-apollo.

Assuming your example is incorrect/incomplete, please correct it.

[ma-jahn]

Thanks for pointing out the side-effect. I'll work on that.

I've changed the example above to only use a single static component with a template string.

[drewbaker]

This component throws that error for me: https://github.com/funkhaus/haus-components/blob/master/WpContent.vue

Downgrading works.

FYI that component Is special in that it allows a string of HTML from WordPress to be passed in, and that string can have Vue components in it and those will be rendered. It requires the compiler version of Vue.

[rchl]

My services are broken after upgrading @nuxtjs/apollo (which upgraded vue-apollo from v3.0.0 to v3.0.1):

TypeError
Cannot read property 'call' of undefined

[rchl]

The pages that are broken are using v-runtime-template/vue-template-compile which might be related.

[PayteR]

Same error here on nuxt, broken after update 3.0.0 > 3.0.1 here is sandbox

https://codesandbox.io/s/wp-content-urj01?fontsize=14&hidenavigation=1&theme=dark

problem is same with render function, that is located components/WpTest.vue

[rchl]

This is a serious regression, probably not only for Nuxt users.

[LinusBorg]

@Akryum I think this needs some attention, do you have a bit of time to check this out?

Seems to be pretty straighforward to fix but I don't feel confident in this codebase to send a PR

[Akryum]

Will look at it today.