Filter files based on parent dir

gatsby-config.js

@@ -20,6 +20,20 @@ module.exports = {
     ],
   },
   plugins: [
+    {
+      resolve: `gatsby-source-filesystem`,
+      options: {
+        name: `data`,
+        path: `${__dirname}/content/pages`,
+      },
+    },
+    {
+      resolve: `gatsby-transformer-remark`,
+      options: {
+        filter: node => node.sourceInstanceName === `data`,
+        type: `MarkdownPage`
+      }
+    },
     {
       resolve: `gatsby-source-filesystem`,
       options: {
@@ -27,11 +41,12 @@ module.exports = {
         path: `${__dirname}/content/posts/`,
       },
     },
-    `gatsby-plugin-react-helmet`,
     {
       resolve: `gatsby-transformer-remark`,
       options: {
-        excerpt_separator: `<!-- end -->`
+        filter: node => node.sourceInstanceName === `pages`,
+        excerpt_separator: `<!-- end -->`,
+        type: `BlogPost`
       }
     },
     {
@@ -43,6 +58,7 @@ module.exports = {
     },
     `gatsby-transformer-sharp`,
     `gatsby-plugin-sharp`,
+    `gatsby-plugin-react-helmet`,
     {
       resolve: `gatsby-plugin-manifest`,
       options: {

gatsby-node.js

@@ -5,11 +5,17 @@ exports.onCreateNode = ({ node, getNode, actions }) => {
   const { createNodeField } = actions
   if (node.internal.type === `MarkdownRemark`) {
     const slug = createFilePath({ node, getNode, basePath: `pages` })
+    const parent = getNode(node.parent)
     createNodeField({
       node,
       name: `slug`,
       value: slug,
     })
+    createNodeField({
+      node,
+      name: 'collection',
+      value: parent.sourceInstanceName,
+    })
   }
 }
 
@@ -19,7 +25,7 @@ exports.createPages = async ({ graphql, actions, reporter }) => {
     const result = await graphql(
       `
         {
-          allMarkdownRemark(filter: {frontmatter: {draft: {ne: true}}}) {
+          allMarkdownRemark(filter:{frontmatter: {draft: {ne: true}}, fields: {collection: {eq: "posts"}}}) {
             edges {
               node {
                 fields {
@@ -41,7 +47,6 @@ exports.createPages = async ({ graphql, actions, reporter }) => {
     // Create pages for each markdown file.
     const blogPostTemplate = path.resolve(`src/templates/blog-post.js`)
     result.data.allMarkdownRemark.edges.forEach(({ node }) => {
-      console.log(node);  
       createPage({
         path: `/posts${node.fields.slug}`,
         component: blogPostTemplate,

src/pages/blog.js

@@ -12,7 +12,7 @@ const IndexPage = () => {
     query {
       allMarkdownRemark(
           sort: { order: DESC, fields: [frontmatter___date] }
-          filter: {frontmatter: {draft: {ne: true}}}
+          filter: {frontmatter: {draft: {ne: true}}, fields: {collection: {eq: "posts"}}}
         ) {
         edges {
           node {