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gatsby-node.js
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gatsby-node.js
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const { createFilePath } = require(`gatsby-source-filesystem`);
const path = require('path');
const pathJoin = (targetPath) => path.join(__dirname, targetPath);
exports.createPages = async ({ graphql, actions }) => {
const { createPage } = actions;
const result = await graphql(`
{
allMarkdownRemark(
sort: { fields: [frontmatter___date], order: DESC }
limit: 1000
) {
edges {
node {
id
html
excerpt(pruneLength: 280)
fields {
slug
}
frontmatter {
title
thumbnail {
childImageSharp {
fluid(maxWidth: 800) {
src
}
}
}
draft
category
tags
date(formatString: "MMMM DD, YYYY")
}
}
}
}
}
`);
const postTemplatePath = pathJoin('./src/containers/post/index.tsx');
if (result.errors) {
throw result.errors;
}
if (result.data) {
const posts = result.data.allMarkdownRemark.edges.filter(
({ node }) => !node.frontmatter.draft && !!node.frontmatter.category,
);
posts.forEach(({ node }, index) => {
const previous = index === 0 ? null : posts[index - 1].node;
const next = index === posts.length - 1 ? null : posts[index + 1].node;
createPage({
path: node.fields.slug,
component: postTemplatePath,
context: {
next,
previous,
node,
},
});
});
}
};
exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions;
if (node.internal.type === `MarkdownRemark`) {
const value = createFilePath({ node, getNode });
createNodeField({
name: `slug`,
node,
value,
});
}
};