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gatsby-node.js
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gatsby-node.js
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const path = require('path');
/*This is a Node JS file where we aim to achieve the goal of extracting the filename from the markdown posts to form a URL */
//That is also called slug which can be extracted through the createNodeField function used below
module.exports.onCreateNode = ({ node, actions }) => {
const { createNodeField } = actions
if(node.internal.type === 'Mdx')
//console.log(JSON.stringify(node, undefined, 4)); is used to examin the object to extract all the following details
{
const slug = path.basename(node.fileAbsolutePath, '.md') //extracts the filename only from path like: gatsby, react
//so that URL could become ../gatsby or ../react
createNodeField({
node,
name: 'slug',
value: slug
})
//Use the slug in the graphql query of blog.js
}
}
/*API FOR GENERATING PAGE DYNAMICALLY (../Template/Blogpage.js) */
module.exports.createPages = async ({ graphql, actions }) => {
const { createPage } = actions
//the generated page will be render in Blogpage.js component
const blogTemplate = path.resolve('./src/Template/Blogpage.js');
const result = await graphql(`
query {
allMdx {
edges {
node {
fields {
slug
}
}
}
}
}
`)
//Generting the actual URL for the dynamic page
result.data.allMdx.edges.forEach((edge)=>{
createPage({
component: blogTemplate,
path: `/${edge.node.fields.slug}`,
context: {
slug: edge.node.fields.slug
}
})
})
}