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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`)
exports.createPages = async ({ graphql, actions }) => {
const { createPage } = actions
const blogPost = path.resolve(`./src/templates/blog-post.js`)
const result = await graphql(
`
{
allMarkdownRemark(
sort: { fields: [frontmatter___date], order: DESC }
limit: 1000
) {
edges {
node {
fields {
slug
}
frontmatter {
title
tag
}
}
}
}
}
`
)
if (result.errors) {
throw result.errors
}
// Create blog posts pages.
const posts = result.data.allMarkdownRemark.edges
posts.forEach((post, index) => {
const previous = index === posts.length - 1 ? null : posts[index + 1].node
const next = index === 0 ? null : posts[index - 1].node
createPage({
path: post.node.fields.slug,
component: blogPost,
context: {
slug: post.node.fields.slug,
tag: post.node.frontmatter.tag,
previous,
next,
},
})
})
// Create blog post list pages
// const postsPerPage = 5
// const numPages = Math.ceil(posts.length / postsPerPage)
// Array.from({ length: numPages }).forEach((_, i) => {
// createPage({
// path: i === 0 ? `/` : `/${i + 1}`,
// component: path.resolve("./src/templates/blog-list.js"),
// context: {
// limit: postsPerPage,
// skip: i * postsPerPage,
// numPages,
// currentPage: i + 1,
// },
// })
// })
// 分类和专栏
const columnTags = Array.from(
new Set(posts.map(post => post.node.frontmatter.tag))
)
columnTags.forEach((tag, i) => {
createPage({
path: `/category/${tag}`,
component: path.resolve("./src/templates/blog-category.js"),
context: {
tag: tag,
},
})
})
}
exports.onCreateNode = ({ node, actions, getNode }) => {
const { createNodeField } = actions
if (node.internal.type === `MarkdownRemark`) {
const value = createFilePath({ node, getNode })
createNodeField({
name: `slug`,
node,
value,
})
}
}