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gatsby-node.js
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gatsby-node.js
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const path = require(`path`);
exports.createPages = async ({ actions, graphql, reporter }) => {
const { createPage } = actions;
/* Use allFile and sourceInstanceName (defined in gatsby-config.js) as this
is more performant than using regex and pathname to filter only articles.
See more in README.md */
const result = await graphql(
`
{
allFile(
filter: {
sourceInstanceName: { eq: "articles" }
extension: { eq: "md" }
}
) {
nodes {
id
relativeDirectory
childMarkdownRemark {
frontmatter {
author
}
}
}
}
}
`
);
if (result.errors) {
reporter.panicOnBuild("Error loading Markdown result", result.errors);
}
const articleTemplate = path.resolve(`./src/templates/article/index.js`);
result.data.allFile.nodes.forEach((node) => {
createPage({
path: `/articles/${node.relativeDirectory}`,
component: articleTemplate,
context: {
id: node.id,
authorName: node.childMarkdownRemark.frontmatter.author,
},
});
});
};
/* Even if an .md file doesn't have the contactInfo field, Gatsby won't throw an
* error because, with the schema typing, it now understands that the field can be optional.
*/
exports.createSchemaCustomization = ({ actions }) => {
const { createTypes } = actions;
createTypes(`
type MarkdownRemarkFrontmatter {
contactInfo: [ContactInfo]
series_title: String
series_number: Int
}
type ContactInfo {
platform: String
url: String
}
`);
};