Craft GraphQL APIs in Elixir with Absinthe

Interface

Description

Represents a list of named fields and their arguments. GraphQL objects can then implement an interface, which guarantees that they will contain the specified fields.

Absinthe Macro

interface

Examples

In an Absinthe schema, defining the interface and mapping results to the associated GraphQL type:

@desc "A named object"
interface :named do
  field :name, :string
  # Other fields to be implemented
  resolve_type fn
    %Item{}, _ ->
      :item
    _, _ ->
      nil
  end
end

An object type implementing the interface:

@desc "An item"
object :item do
  interfaces [:named]
  field :name, :string
  # Other fields
end