I have an extremely simple mutation that works in the Playground but not in my Apollo Client. 😢

How are you calling mutation from apollo client?

This is in

Vue-Apollo

.

submitPost () {
      const body = <http://this.post|this.post>
      this.$apollo.mutate({
        mutation: api.posts.mutations.addPost,
        variables: {
          body,
          parentId: null
        }
      }).then(response => {
        console.log(response)
      }).catch(error => {
        console.log(error)
      }).finally(() => {
        <http://this.post|this.post> = ''
      })
    }

Code looks good to me. Did you verify if call is being made correctly in network tab?

Yep. Header is there and the query is there just as its written above.

what means "it doesn't work"?

I receive a 400 error when attempting this mutation from inside Vue-Apollo. The mutation works when sent through Playground.

do you get the error from your GraphQL Server directly without it being passed to Prisma?

Re: error, I’ll have to double check tomorrow. And do you mean because parentId was

null

in that above example? I’ve tried omitting that field completely to no avail, but omitting / passing

null

also works in Playground.

yes.

After digging through the server response a bit, I figured out the errors. I was defining

$parentId

as a

String

when it was supposed to be an

ID

.

hmm ok!

The problem was with Apollo, not Prisma. The query worked on Playground because I was doing a direct mutation, not one with arguments. If you'd still like, I could put something together.

but the server did end up returning 400, right? I think documenting this error on Github (or SO, for that matter) will be super helpful for others running into the same issue

Yeah I can do that. Basically it boiled down to me forgetting my query types 😅

yea right. that's probably quite common 😄