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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/
*/
const nodePath = require("path");
const { createFilePath } = require(`gatsby-source-filesystem`);
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
});
}
};
// Implement the Gatsby API “createPages”. This is called once the
// data layer is bootstrapped to let plugins create pages from data.
exports.createPages = ({ graphql, actions }) => {
const { createPage } = actions;
return new Promise((resolve, reject) => {
const projectTemplate = nodePath.resolve(`src/templates/project.js`);
// Query for markdown nodes to use in creating pages.
resolve(
graphql(
`
{
allMarkdownRemark(limit: 1000) {
edges {
node {
fields {
slug
}
}
}
}
}
`
).then((result) => {
if (result.errors) {
reject(result.errors);
}
// Create pages for each markdown file.
result.data.allMarkdownRemark.edges.forEach(({ node }) => {
const { slug } = node.fields;
const template = projectTemplate;
createPage({
component: template,
path: slug,
// In your blog post template's graphql query, you can use path
// as a GraphQL variable to query for data from the markdown file.
context: {
slug: node.fields.slug
}
});
});
})
);
});
};