The official Gatsby source plugin for GraphCMS projects 🚀

• Demo • gatsby-starter-graphcms-blog

yarn add gatsby-source-graphcms

We recommend using environment variables with your GraphCMS token and endpoint values. You can learn more about using environment variables with Gatsby here.

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-source-graphcms',
      options: {
        endpoint: process.env.GRAPHCMS_ENDPOINT,
      },
    },
  ],
}

You can also provide an auth token using the token configuration key. This is necessary if your GraphCMS project is not publicly available, or you want to scope access to a specific content stage (i.e. draft content).

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-source-graphcms',
      options: {
        endpoint: process.env.GRAPHCMS_ENDPOINT,
        token: process.env.GRAPHCMS_TOKEN,
      },
    },
  ],
}

• Querying localised nodes
• Downloading local image assets
• Using markdown nodes
• Working with query fragments

If using GraphCMS localisation, this plugin provides support to build nodes for all provided locales.

Update your plugin configuration to include the locales key.

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-source-graphcms',
      options: {
        endpoint: process.env.GRAPHCMS_ENDPOINT,
        locales: ['en', 'de'],
      },
    },
  ],
}

To query for nodes for a specific locale, use the filter query argument.

{
  enProducts: allGraphCmsProduct(filter: { locale: { eq: en } }) {
    nodes {
      name
    }
  }
}

Check out the demo source for an example of a localisation implementation.

This source plugin provides the option to download and cache GraphCMS assets in your Gatsby project. This enables you to use gatsby-image, for image loading optimizations, with your GraphCMS image assets.

To enable this, add downloadLocalImages: true to your plugin configuration.

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-source-graphcms',
      options: {
        endpoint: process.env.GRAPHCMS_ENDPOINT,
        downloadLocalImages: true,
      },
    },
  ],
}

This adds a localFile field to the GraphCMS_Asset type which resolves to the file node generated at build by gatsby-source-filesystem.

You can then use the fragments from gatsby-transformer-sharp as a part of your GraphQL query.

{
  allGraphCmsAsset {
    nodes {
      localFile {
        childImageSharp {
          fixed {
            ...GatsbyImageSharpFixed
          }
        }
      }
    }
  }
}

For more information on using gatsby-image, please see the documentation.

This source plugin provides the option to build markdown nodes for all RichText fields in your GraphCMS schema, which in turn can be used with MDX.

To enable this, add buildMarkdownNodes: true to your plugin configuration.

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-source-graphcms',
      options: {
        endpoint: process.env.GRAPHCMS_ENDPOINT,
        buildMarkdownNodes: true,
      },
    },
  ],
}

Enabling this option adds a markdownNode nested field to all RichText fields on the generated Gatsby schema.

These newly built nodes can be used with gatsby-plugin-mdx to render markdown from GraphCMS.

Once installed, you will be able to query for MDX fields using a query similar to the one below.

{
  allGraphCmsPost {
    nodes {
      id
      content {
        markdownNode {
          childMdx {
            body
          }
        }
      }
    }
  }
}

Check out the demo source for an example of a full MDX implementation.

The source plugin will generate and save GraphQL query fragments for every node type. By default, they will be saved in a graphcms-fragments directory at the root of your Gatsby project. This can be configured:

If using multiple instances of the source plugin, you must provide a value to prevent type and/or fragment conflicts.

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-source-graphcms',
      options: {
        endpoint: process.env.GRAPHCMS_ENDPOINT,
        fragmentsPath: 'my-query-fragments',
      },
    },
  ],
}

The generated fragments are then read from the project for subsequent builds. It is recommended that they are checked in to version control for your project.

Should you make any changes or additions to your GraphCMS schema, you will need to update the query fragments accrdingly. Alternatively they will be regnerated on a subsequent build after removing the directory from your project.

In some instances, you may need modify query fragments on a per type basis. This may involve:

• Removing unrequired fields
• Adding new fields with arguments as an aliased field

For example, adding a featuredCaseStudy field:

fragment Industry on Industry {
  featuredCaseStudy: caseStudies(where: { featured: true }, first: 1)
}

Field arguments cannot be read by Gatsby from the GraphCMS schema. Instead we must alias any required usages as aliased fields. In this example, the featuredCaseStudy field would then be available in our Gatsby queries:

{
  allGraphCmsIndustry {
    nodes {
      featuredCaseStudy {
        ...
      }
    }
  }
}