GraphQL query failure

Hey Dustin!

First off, wanted to thank you for taking the time to write your blog post on getting a Gatsby blog setup. It was helpful to have some sort of path to creating something working.

Got a question for you though:

query BlogPostByPath($path: String!) {
  ...
}

When I put this query inside the graphql debugger, it was returning an error for me because it couldn’t find $path. However, when I removed the ! it worked.

query BlogPostByPath($path: String) {
  ...
}

Could you explain why there is a ! there?

[bencodezen]

@DSchau Ah. I think I see what happened. You provided a Query Variable in the debugger. I didn’t even see that section when I was using the debugger. I just assumed that it would actually query the file system instead of depending on the variable.

Thanks for the response!

[DSchau]

No problem!