Craft GraphQL APIs in Elixir with Absinthe

Special Types

Lists (Collection Type)

Description

Lists are ordered sequences of values.

Examples

In an Absinthe schema, use the list_of/1 macro to declare the type as a list of a given type:

object :person do
  field :pets, list_of(:pets)
  # Other fields
end

Non-Null (Constraint)

Description

To declare a type that disallows null values, the GraphQL NonNull type can be used. This type wraps an underlying type, and this type acts identically to that wrapped type, with the exception that null values are not valid responses for the wrapping type.

Examples

In an Absinthe schema, use the non_null/1 macro to declare the type as non-nullable:

input_object :contact_input do
  field :name, non_null(:string)
  # Other fields
end

Null ...