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gatsby-node.js
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gatsby-node.js
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//This onCreateNode function will be called by Gatsby whenever a new node is created (or updated).
const path = 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,
})
}
}
exports.createPages = async ({ graphql, actions }) => {
const { createPage } = actions
// **Note:** The graphql function call returns a Promise
// see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise for more info
const result = await graphql(`
query {
allMarkdownRemark {
edges {
node {
fields {
slug
}
}
}
}
}
`)
// use a templete to crete page
result.data.allMarkdownRemark.edges.forEach(({ node }) => {
createPage({
path: node.fields.slug,
component: path.resolve(`./src/templates/blog-post.js`),
context: {
// Data passed to context is available
// in page queries as GraphQL variables.
slug: node.fields.slug,
},
})
})
}