graphql duplicated documents error when retreiving multiple data types in Gatsby-node.js

Question

I have a simple Gatsby prototype that utilizes Kentico Cloud as a data source. Luckily for me, they have already built a source plugin that I'm utilizing to fetch a single data type called 'BlogPost'. This works as expected.

gatsby-node.js source

const path = require(`path`);

exports.createPages = ({graphql, actions}) => {
    const { createPage } = actions;
    return new Promise((resolve, reject) => {
        graphql(`
        {
            allKenticoCloudItemBlogPost {
              edges {
                node {
                  elements {
                    url_slug{
                      value
                    }
                  }
                }
              }
            }
          }
        `).then(result => {        
            console.log(result);
            result.data.allKenticoCloudItemBlogPost.edges.map(({node}) => {
                createPage({
                    path: `${node.elements.url_slug.value}`,
                    component: path.resolve(`./src/templates/blog-post.js`),
                    context: {
                        slug: node.elements.url_slug.value,
                    },
                })
            })
            resolve();
        })
    });

}

This works great, but I really want to add a second data type called 'Articles'

Following the Gatsby Kentico Starter Template Example, I've modified my gatsby-node.js file

const path = require(`path`);

exports.createPages = ({graphql, actions}) => {
    const { createPage } = actions;

    return new Promise((resolve, reject) => {
        graphql(`
        {
          allKenticoCloudItemBlogPost {
            edges {
              node {
                elements {
                  url_slug{
                    value
                  }
                }
              }
            }
          }
          allKenticoCloudItemArticle{
            edges{
              node{
                elements{
                  url_slug{
                    value
                  } 
                }
                internal{
                  type
                }
              }
            }
          }
        }
        `).then(result => {
            console.log('START HERE');        
            console.log(JSON.stringify(result));
            result.data.allKenticoCloudItemBlogPost.edges.map(({node}) => {
              createPage({
                  path: `${node.elements.url_slug.value}`,
                  component: path.resolve(`./src/templates/blog-post.js`),
                  context: {
                      slug: node.elements.url_slug.value,
                  },
              })
            });
            result.data.allKenticoCloudItemArticle.edges.map(({node}) => {
              createPage({
                path: `${node.elements.url_slug.value}`,
                component: path.resolve(`./src/templates/article.js`),
                context: {
                  slug: node.elements.url_slug.value,
                },
              })
            })
            resolve();
        })
    });
}

As you can see, I logged the results so I could see what they look like.

console.log(JSON.stringify(result));

Produces

{
  "data": {
    "allKenticoCloudItemBlogPost": {
      "edges": [
        {
          "node": { "elements": { "url_slug": { "value": "my-first-post" } } }
        },
        {
          "node": {
            "elements": { "url_slug": { "value": "my-second-blog-post" } }
          }
        },
        { "node": { "elements": { "url_slug": { "value": "3rd-blog-post" } } } }
      ]
    },
    "allKenticoCloudItemArticle": {
      "edges": [
        {
          "node": {
            "elements": { "url_slug": { "value": "article-1-example" } },
            "internal": { "type": "KenticoCloudItemArticle" }
          }
        },
        {
          "node": {
            "elements": { "url_slug": { "value": "article-2" } },
            "internal": { "type": "KenticoCloudItemArticle" }
          }
        }
      ]
    }
  }
}

So far, so good. I see what I expect to see.

And when I run gatsby develop it actually compiles successfully, but with a graphQL Error

error GraphQL Error There was an error while compiling your site's GraphQL queries. Error: RelayParser: Encountered duplicate defintitions for one or more documents: each document must have a unique name. Duplicated documents: - templateBuilder

I attempted to solve this by putting a comma after my first BlogPost query.

graphql(`
{
  allKenticoCloudItemBlogPost {
    edges {
      node {
        elements {
          url_slug{
            value
          }
        }
      }
    }
  },
  allKenticoCloudItemArticle{
    edges{
      node{
        elements{
          url_slug{
            value
          } 
        }
        internal{
          type
        }
      }
    }
  }
}

I attempted to put a new query in as a new promise but got a notification from my editor that it was unreachable code so I know that won't work.

It has to be something small as I've modeled my code after the Gatsby Kentico Source Plugin starter which uses the same technologies I am. I can download and run that project with no problem. So I'm not sure what I'm doing wrong.

EDIT

I solved this. The problem was in templates for each data type. I was naming both queries as templateBuilder. I changed the blog template to blogBuilder and the article template to articleBuilder. Works like a charm now.

article.js

export const query = graphql`
  query articleBuilder($slug: String!) {
    kenticoCloudItemArticle(elements: { url_slug: { value: { eq: $slug } } }) {
      elements {
        article_title {
          value
        }
        article_content {
          value
        }
        article_date {
          value
        }
        url_slug {
          value
        }
      }
    }
  }
`;

blog-post.js

export const query = graphql`
  query blogBuilder($slug: String!) {
    kenticoCloudItemBlogPost(elements: { url_slug: { value: { eq: $slug } } }) {
      elements {
        blog_title {
          value
        }
        blog_content {
          value
        }
        blog_date {
          value
        }
        url_slug {
          value
        }
      }
    }
  }
`;

graphql duplicated documents error when retreiving multiple data types in Gatsby-node.js

Answers (1)

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