Run gatsby develop
and open up GraphiQL.
Execute a query like…
query {
allMdx(
filter: {frontmatter: {title: {eq: "First Post"}}}
) {
edges {
node {
id
}
}
}
allFile(
filter: {childMdx: {frontmatter: {title: {eq: "First Post"}}}}
) {
edges {
node {
id
}
}
}
}