gatsby-node.js

const path = require("path")
exports.createPages = ({ graphql, boundActionCreators }) => {
  const { createPage } = boundActionCreators
  return new Promise((resolve, reject) => {
    const BlogPostTemplateDe = path.resolve("src/templates/blog-posts.de.js")
    const BlogPostTemplateEn = path.resolve("src/templates/blog-posts.en-US.js")
    resolve(
      graphql(`
        {
          allContentfulBlogPost {
            edges {
              node {
                slug
                node_locale
              }
            }
          }
        }
      `).then(result => {
        if (result.errors) {
          reject(result.errors)
        }
        result.data.allContentfulBlogPost.edges.forEach(edge => {
          edge.node.node_locale === "de"
            ? createPage({
                path: "/" + edge.node.slug,
                component: BlogPostTemplateDe,
                context: {
                  slug: edge.node.slug,
                  node_locale: edge.node.node_locale,
                },
              })
            : createPage({
                path: "/en-US/" + edge.node.slug,
                component: BlogPostTemplateEn,
                context: {
                  slug: edge.node.slug,
                  node_locale: edge.node.node_locale,
                },
              })
        })
        return
      })
    )
  }).then(result => {
    const serviceTemplateDe = path.resolve("src/templates/services.de.js")
    const serviceTemplateEn = path.resolve("src/templates/services.en-US.js")
    graphql(`
      {
        allContentfulServices {
          edges {
            node {
              slug
              node_locale
            }
          }
        }
      }
    `).then(result => {
      if (result.errors) {
        reject(result.errors)
      }
      result.data.allContentfulServices.edges.forEach(edge => {
        edge.node.node_locale === "de"
          ? createPage({
              path: "/services/" + edge.node.slug,
              component: serviceTemplateDe,
              context: {
                slug: edge.node.slug,
                node_locale: edge.node.node_locale,
              },
            })
          : createPage({
              path: "/en-US/services/" + edge.node.slug,
              component: serviceTemplateEn,
              context: {
                slug: edge.node.slug,
                node_locale: edge.node.node_locale,
              },
            })
      })
      return
    })
  })
}