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gatsby-node.js
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gatsby-node.js
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const path = require('path');
const { createFilePath } = require('gatsby-source-filesystem');
module.exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions;
if (node.internal.type === 'MarkdownRemark') {
const slug = path.basename(node.fileAbsolutePath, '.md');
createNodeField({
node,
name: 'slug',
value: slug,
});
}
};
module.exports.createPages = async ({ graphql, actions }) => {
const { createPage } = actions;
const blogTemplate = path.resolve('./src/templates/blog.js');
const res = await graphql(`
query {
allMarkdownRemark {
edges {
node {
fields {
slug
}
}
}
}
}
`);
if (res.errors) {
reporter.panicOnBuild(`Error while running GraphQL query.`);
return;
}
// Create blog-list pages
const posts = res.data.allMarkdownRemark.edges;
const postsPerPage = 6;
const numPages = Math.ceil(posts.length / postsPerPage);
Array.from({ length: numPages }).forEach((_, i) => {
createPage({
path: i === 0 ? `/blog` : `/blog/${i + 1}`,
component: path.resolve('./src/templates/blogList.js'),
context: {
limit: postsPerPage,
skip: i * postsPerPage,
numPages,
currentPage: i + 1,
},
});
});
res.data.allMarkdownRemark.edges.forEach((edge) => {
createPage({
component: blogTemplate,
path: `/blog/${edge.node.fields.slug}`,
context: {
slug: edge.node.fields.slug,
},
});
});
};