gatsby-node.js

/**
 * Implement Gatsby's Node APIs in this file.
 *
 * See: https://www.gatsbyjs.org/docs/node-apis/
 */

// You can delete this file if you're not using it


const path = require("path")
const { createFilePath, createFileNode } = require(`gatsby-source-filesystem`)
exports.createPages = ({ actions, graphql }) => {
    const { createPage } = actions
    return new Promise((resolve, reject) => {
        resolve(graphql(`
    {
      allMarkdownRemark(sort: { order: ASC, fields: [frontmatter___title] } limit: 1000) {
        edges {
          node {
              fields{
                  slug
              }
            frontmatter {
              title
              subtitle
              abstract
              date
              keywords
            }
          }
        }
      }
    }
  `).then(result => {
                if (result.errors) {
                    console.log(result.errors)
                    return reject(result.errors)
                }
                const blogTemplate = path.resolve('./src/components/tutorials.js');
                result.data.allMarkdownRemark.edges.forEach(({ node }) => {
                    createPage({
                        path: node.fields.slug,
                        component: blogTemplate,
                        context: {
                            slug: node.fields.slug,
                        }, // additional data can be passed via context
                    })
                })
                return
            })
        )
    })
}

exports.onCreateNode = ({ node, getNode, actions }) => {
    const { createNodeField } = actions
    if (node.internal.type === `MarkdownRemark`) {
        const slug = createFilePath({ node, getNode, basePath: `pages` })
        createNodeField({
            node,
            name: `slug`,
            value: slug,
        })
    }
}