WebpackError: Cannot read property 'node' of undefined

[antonio]

Anyone run into this when trying to run a build?

error Building static HTML for pages failed

See our docs page on debugging HTML builds for help https://goo.gl/yL9lND

  58 |         ? this.props.data.allAuthorsJson.edges
  59 |         : [];
> 60 |     const getAuthor = () => authorsEdges[0].node;
     |                                             ^
  61 | 
  62 |     return (
  63 |       <Drawer className="author-template" isOpen={this.state.menuOpen}>


  WebpackError: Cannot read property 'node' of undefined

   - author.jsx:60 getAuthor
     src/templates/author.jsx:60:45

   - author.jsx:78 AuthorTemplate.render
     src/templates/author.jsx:78:34

   - ReactCompositeComponent.js:796 ReactCompositeComponentWrapper._renderValidatedComponentWithoutO    wnerOrContext
~/react-dom/lib/ReactCompositeComponent.js:796:1

   - ReactCompositeComponent.js:819 ReactCompositeComponentWrapper._renderValidatedComponent
~/react-dom/lib/ReactCompositeComponent.js:819:1

   - ReactCompositeComponent.js:359 ReactCompositeComponentWrapper.performInitialMount
~/react-dom/lib/ReactCompositeComponent.js:359:1

   - ReactCompositeComponent.js:255 ReactCompositeComponentWrapper.mountComponent
~/react-dom/lib/ReactCompositeComponent.js:255:1

   - ReactReconciler.js:43 Object.mountComponent
~/react-dom/lib/ReactReconciler.js:43:1

   - ReactMultiChild.js:234 ReactDOMComponent.mountChildren
~/react-dom/lib/ReactMultiChild.js:234:1

   - ReactDOMComponent.js:657 ReactDOMComponent._createContentMarkup
~/react-dom/lib/ReactDOMComponent.js:657:1

   - ReactDOMComponent.js:524 ReactDOMComponent.mountComponent
~/react-dom/lib/ReactDOMComponent.js:524:1

[Hays Clark]

Unfortunately, that error message is miss-leading, this is the actual error.

> 60 | const getAuthor = () => authorsEdges[0].node;

Check the blogAuthorDir value in your data/SiteConfig.js file. Within that folder, there MUST be an 'authors' folder, which MUST contains at least one author JSON file.

Author filename example for 'casper' user:
casper.json

Expected formatting for an author JSON file:

{
  "id": "casper",
  "name": "Casper User",
  "image": "https://api.adorable.io/avatars/150/test.png",
  "url": "http://gatsbyjs.org/",
  "location": "North Pole, Earth",
  "bio": "Yeah, I like animals better than people sometimes... Especially dogs. Dogs are the best. Every time you come home, they act like they haven't seen you in a year. And the good thing about dogs... is they got different dogs for different people.",
  "socialUrls": [
    "https://github.com/gatsbyjs",
    "https://twitter.com/gatsbyjs",
    "mailto:[e-mail]"
  ]
}

[Hays Clark]

@antonioOrtiz Feel free to re-open this issue if you are still running into trouble.

[Madhu Sudhan Subedi]

Hi Everyone, I got the following error message while running the gatsby build command for the first time.

However, gatsby develop command works fine. Could you please help me on this 😊.

[Madhu Sudhan Subedi]

Hi Everyone, I got the following error message while running the gatsby build command for the first time.

However, gatsby develop command works fine. Could you please help me on this 😊.

Hi @haysclark after adding nodes in pageContex property in tag.jsx issue is fixed now. Like this
pageContext: { nodes, tag, page, pages, total, limit, prev, next }

But still there is the cannot find module '!raw-loader' warning is still there.