Gatsby tip on running multiple queries (GraphQL aliases)

2 min read

Gatsby tip on running multiple queries (GraphQL aliases)

Say you want to fetch specific data in one page based on an argument or a condition which can't be run using one query as you can't query the same field with different condition or argument. One way of doing that by using GraphQL aliases which you can use to rename the returned dataset to anything you want.

Example

1
export const query = graphql`
2
  query {
3
    post: allMarkdownRemark(
4
      limit: 3
5
      sort: { order: DESC, fields: [frontmatter___date] }
6
      filter: { frontmatter: { type: { ne: "portfolio" } } }
7
    ) {
8
      edges {
9
        node {
10
          timeToRead
11
          frontmatter {
12
            title
13
            path
14
            date(formatString: "DD MMMM YYYY")
15
            summary
16
            images
17
            tags
18
            type
19
          }
20
        }
21
      }
22
    }
23
    portfolio: allMarkdownRemark(
24
      sort: { order: DESC, fields: [frontmatter___date] }
25
      filter: { frontmatter: { type: { eq: "portfolio" } } }
26
    ) {
27
      edges {
28
        node {
29
          frontmatter {
30
            title
31
            path
32
            images
33
            tags
34
            type
35
          }
36
        }
37
      }
38
    }
39
    siteMetaData: site {
40
      siteMetadata {
41
        title
42
      }
43
    }
44
  }
45
`;

Looking at the above example, we can see the query I made will return multiple datasets by giving it an alias which allowed me to run multiple queries with different arguments and conditions to get the specific data object I needed as you can see in the screenshot.

graphql alias