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gatsby-node.js
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gatsby-node.js
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const path = require(`path`)
exports.createPages = ({ graphql, actions }) => {
const { createPage } = actions
const blogPostTemplate = path.resolve(
`${__dirname}/src/components/blog/BlogPostTemplateWithPageContext.jsx`
)
return graphql(`
{
defaultImage: allFile(
filter: {
sourceInstanceName: { eq: "blogPostHeaderImages" }
name: { eq: "genau-logo" }
}
) {
edges {
node {
name
childImageSharp {
fixed(width: 150, height: 150) {
base64
tracedSVG
aspectRatio
width
height
src
srcSet
srcWebp
srcSetWebp
originalName
}
}
}
}
}
images: allFile(
filter: { sourceInstanceName: { eq: "blogPostHeaderImages" } }
) {
edges {
node {
name
childImageSharp {
fixed(width: 150, height: 150) {
base64
tracedSVG
aspectRatio
width
height
src
srcSet
srcWebp
srcSetWebp
originalName
}
}
}
}
}
blogPosts: allFile(
filter: {
sourceInstanceName: { eq: "blogPosts" }
extension: { eq: "md" }
}
) {
edges {
node {
name
childMarkdownRemark {
excerpt(truncate: true, pruneLength: 140)
html
frontmatter {
title
date
author
slug
}
}
}
}
}
}
`).then(results => {
if (results.errors) {
throw results.erros
}
const defaultImageFixed =
results.data.defaultImage.edges[0].node.childImageSharp.fixed
results.data.blogPosts.edges.forEach(edge => {
let postImageFixed = results.data.images.edges
.filter(imageEdge => imageEdge.node.name === edge.node.name)
.map(imageEdge => imageEdge.node.childImageSharp.fixed)
if (postImageFixed.length === 0) {
postImageFixed = defaultImageFixed
} else {
postImageFixed = postImageFixed[0]
}
createPage({
path: `blog/${edge.node.childMarkdownRemark.frontmatter.slug}`,
component: blogPostTemplate,
context: {
postImageFixed,
postRemark: edge.node.childMarkdownRemark,
},
})
})
})
}