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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`);
// REVIEW: Not sure where node, getNode, actions come from
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
});
}
};
// REVIEW: Not sure where graphql and actions come from
exports.createPages = ({ graphql, actions }) => {
const { createPage } = actions;
return new Promise((resolve, reject) => {
graphql(`
{
allMarkdownRemark {
edges {
node {
fields {
slug
}
}
}
}
}
`).then(result => {
result.data.allMarkdownRemark.edges.forEach(({ node }) => {
createPage({
path: node.fields.slug,
// REVIEW: Not sure why the resolve this is needed.
component: path.resolve(`./src/templates/blog-post.js`),
context: {
// REVIEW: Data passed to context is available
// in page queries as GraphQL variables.
slug: node.fields.slug
}
});
});
resolve();
});
});
};