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gatsby-node.js
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gatsby-node.js
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/**
* Implement Gatsby's Node APIs in this file.
*
* See: https://www.gatsbyjs.org/docs/node-apis/
*/
// add all markdown content to gatsby graphQL from src/data with correct paths
exports.onCreateNode = ({ node, getNode, actions }) => {
const { createNodeField } = actions
if (
node.internal.mediaType !== 'text/markdown' &&
node.internal.type === 'File'
) {
console.log(node)
}
// BLOG POSTS
if (
node.internal.type === `MarkdownRemark` &&
node.frontmatter.layout === 'post'
) {
const fileNode = getNode(node.parent)
// relative path structure: YYYY-MM-DD-blog-post-title.md
const fragments = fileNode.relativePath.split('-')
const folderName = fragments
.slice(0, 3)
.join('')
.slice(2) // => YYMMDD
const fileName = fragments
.slice(3)
.join('-')
.replace('.md', '') // => blog-post-title
createNodeField({
node,
name: `path`,
value: `/${folderName}/${fileName}`,
})
}
// COMICS
if (
node.internal.type === `MarkdownRemark` &&
node.frontmatter.layout === 'comic'
) {
const fileNode = getNode(node.parent)
// relative path structure: comic-title.md
const fileName = fileNode.relativePath.replace('.md', '') // => comic-title
createNodeField({
node,
name: `path`,
value: `/${fileName}`,
})
}
}
const path = require('path')
exports.createPages = async ({ actions, graphql }) => {
const { createPage } = actions
const blogPostTemplate = path.resolve(`src/templates/blogTemplate.js`)
// create blog post pages
await graphql(`
{
allMarkdownRemark(
filter: { frontmatter: { layout: { eq: "post" } } }
sort: { order: DESC, fields: [frontmatter___date] }
limit: 10000
) {
edges {
next {
fields {
path
}
}
node {
fields {
path
}
}
previous {
fields {
path
}
}
}
}
}
`).then((result) => {
if (result.errors) {
return Promise.reject(result.errors)
}
result.data.allMarkdownRemark.edges.forEach(({ node, next, previous }) => {
createPage({
path: node.fields.path,
component: blogPostTemplate,
context: {
nextPostPath: next && next.fields && next.fields.path,
previousPostPath: previous && previous.fields && previous.fields.path,
}, // additional data can be passed via context
})
})
})
// create comics pages
await graphql(`
{
allMarkdownRemark(
filter: { frontmatter: { layout: { eq: "comic" } } }
limit: 10000
) {
edges {
node {
fields {
path
}
}
}
}
}
`).then((result) => {
if (result.errors) {
return Promise.reject(result.errors)
}
result.data.allMarkdownRemark.edges.forEach(({ node, next, previous }) => {
createPage({
path: node.fields.path,
component: blogPostTemplate,
context: {}, // additional data can be passed via context
})
})
})
}