I cannot create a subject

RawShed · December 2, 2020, 10:31pm

I get this error when i try to create a topic. What is the cause?

erez · March 30, 2020, 9:19am

Hi @RawShed and welcome A
Are you using a custom preview template? If so can you share the template code, the way you’re registering it and your config.yml?
Looks like you’re passing a null value in your custom code.
Sharing the repo will also be of great help if you can.

RawShed · March 30, 2020, 9:59am

@erez Github repo: https://github.com/fuatcangenc/gatsby-deneme

erez · March 30, 2020, 1:55pm

Hi @RawShed, it looks like the image can be null here:

github.com

fuatcangenc/gatsby-deneme/blob/b999dfaf4aad4ea78db7a7e1c74263801f674e3d/src/components/SEO/index.jsx#L26


  description = postMeta.description
    ? postMeta.description
    : postNode.excerpt;
  image = postMeta.cover;
  postURL = urljoin(config.siteUrl, config.pathPrefix, postPath);
} else {
  title = config.siteTitle;
  description = config.siteDescription;
  image = config.siteLogo;
}
image = urljoin(config.siteUrl, config.pathPrefix, image);
const blogURL = urljoin(config.siteUrl, config.pathPrefix);
const schemaOrgJSONLD = [
  {
    "@context": "http://schema.org",
    "@type": "WebSite",
    url: blogURL,
    name: title,
    alternateName: config.siteTitleAlt ? config.siteTitleAlt : ""
  }
];

Some posts don’t have the cover property.