gatsby-node.js

//const { createFilePath } = require('gatsby-source-filesystem')
const path = require('path')



exports.createPages = ({ graphql, actions }) => {
    const { createPage } = actions

    const blogPost = path.resolve(`./src/templates/blog-post-contentful.js`)
    return graphql(
    `
        {
            allContentfulPost {
                edges {
                    node {
                        slug
                        title
                    }
                }
            }
        }
    `
    ).then(result => {
        if (result.errors) {
            throw result.errors
        }

        // Create blog posts pages
        const posts = result.data.allContentfulPost.edges

        posts.forEach((post, index) => {
            const previous = index === posts.length - 1 ? null : posts[index + 1].node
            const next = index === 0 ? null : posts[index - 1].node

            // TODO: Implement Previous and Next links in blog-post-contentful
            createPage({
                path: post.node.slug,
                component: blogPost,
                context: {
                    slug: post.node.slug,
                    previous,
                    next,
                },
            })
        })
    })
}