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gatsby-node.js
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gatsby-node.js
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const _ = require('lodash');
const path = require('path');
const { createFilePath } = require('gatsby-source-filesystem');
const { fmImagesToRelative } = require('gatsby-remark-relative-images');
exports.createPages = ({ actions, graphql }) => {
const { createPage } = actions;
return graphql(`
{
allMarkdownRemark(limit: 1000) {
edges {
node {
id
fields {
slug
}
frontmatter {
tags
templateKey
}
}
}
}
}
`).then(result => {
if (result.errors) {
result.errors.forEach(e => console.error(e.toString()));
return Promise.reject(result.errors);
}
const posts = result.data.allMarkdownRemark.edges;
posts.forEach(edge => {
const id = edge.node.id;
createPage({
path: edge.node.fields.slug,
tags: edge.node.frontmatter.tags,
component: path.resolve(
`src/templates/${String(edge.node.frontmatter.templateKey)}.js`
),
// additional data can be passed via context
context: {
id
}
});
});
// Tag pages:
let tags = [];
// Iterate through each post, putting all found tags into `tags`
posts.forEach(edge => {
if (_.get(edge, `node.frontmatter.tags`)) {
tags = tags.concat(edge.node.frontmatter.tags);
}
});
// Eliminate duplicate tags
tags = _.uniq(tags);
// Make tag pages
tags.forEach(tag => {
const tagPath = `/tags/${_.kebabCase(tag)}/`;
createPage({
path: tagPath,
component: path.resolve(`src/templates/tags.js`),
context: {
tag
}
});
});
});
};
exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions;
fmImagesToRelative(node); // convert image paths for gatsby images
if (node.internal.type === `MarkdownRemark`) {
const value = createFilePath({ node, getNode });
createNodeField({
name: `slug`,
node,
value
});
}
};
// exports.createSchemaCustomization = ({ actions, schema }) => {
// const { createTypes } = actions;
// const typeDefs = [
// 'type MarkdownRemark implements Node { frontmatter: Frontmatter }',
// schema.buildObjectType({
// name: 'Frontmatter',
// fields: {
// filesList: {
// //type: ['MarkdownRemark'],
// resolve(source, args, context, info) {
// // For a more generic solution, you could pick the field value from
// // `source[info.fieldName]`
// const { filesList } = source;
// if (
// source.filesList == null ||
// (Array.isArray(filesList) && !filesList.length)
// ) {
// return [
// {
// title: null,
// file: null
// }
// ];
// }
// return filesList;
// }
// }
// }
// })
// ];
// createTypes(typeDefs);
// };