In order to use Custom Taxonomies with WPGraphQL, you must configure the Taxonomy to
show_in_graphql using the following fields:
- show_in_graphql (boolean): true or false
- graphql_single_name (string): camel case string with no punctuation or spaces. Needs to start with a letter (not a number). Important to be different than the plural name.
- graphql_plural_name (string): camel case string with no punctuation or spaces. Needs to start with a letter (not a number). Important to be different than the single name.
This is an example of registering a new “document_tag” Taxonomy to be connected to the “docs” Custom Post Type and enabling GraphQL support.
If you want to expose a Taxonomy that you don’t control the registration for, such as a taxonomy registered by a third-party plugin, you can filter the Taxonomy registration like so:
Querying terms of Custom Taxonomies is nearly identical to querying Categories and Tags. The difference being the name assigned by
Assuming the taxonomy was registered as shown above, with
graphql_plural_name set to
documentTags, you would be able to query like so:
And because the taxonomy was registered in relation to the
docs Post Type, you’d be able to query the connected nodes like so:
And you’d be able to query a single `documentTag` like so:
Mutating Custom Taxonomy terms is nearly identical to mutation Categories and Tags.