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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');
exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions;
// We only want to operate on `Mdx` nodes. If we had content from a
// remote CMS we could also check to see if the parent node was a
// `File` node here
if (node.internal.type === 'Mdx') {
const value = createFilePath({ node, getNode });
createNodeField({
// Name of the field you are adding
name: 'slug',
// Individual MDX node
node,
// Generated value based on filepath with "blog" prefix. We
// don't need a separating "/" before the value because
// createFilePath returns a path with the leading "/".
value: `${value}`,
});
}
};
exports.createPages = async ({ graphql, actions, reporter }) => {
// Destructure the createPage function from the actions object
const { createPage } = actions;
const result = await graphql(`
query {
allMdx {
edges {
node {
id
fields {
slug
}
}
}
}
}
`);
if (result.errors) {
reporter.panicOnBuild('🚨 ERROR: Loading "createPages" query');
}
// Create blog post pages.
const posts = result.data.allMdx.edges;
// We'll call `createPage` for each result
posts.forEach(({ node }, index) => {
createPage({
// This is the slug we created before
// (or `node.frontmatter.slug`)
path: node.fields.slug,
// This component will wrap our MDX content
component: path.resolve(`./src/components/NewsLayout.js`),
// We can use the values in this context in
// our page layout component
context: { id: node.id },
});
});
};
exports.onCreateWebpackConfig = ({ actions }) => {
actions.setWebpackConfig({
resolve: {
modules: [path.resolve(__dirname, 'src'), 'node_modules'],
},
});
};