Represents a primitive value.

GraphQL responses take the form of a hierarchical tree; the leaves on these trees are scalars.

Also see Absinthe.Type.Object.

Built-In Scalars

The following built-in scalar types are defined:

• :boolean - Represents true or false. See the GraphQL Specification.
• :float - Represents signed double‐precision fractional values as specified by IEEE 754. See the GraphQL Specification.
• :id - Represents a unique identifier, often used to refetch an object or as key for a cache. The ID type is serialized in the same way as a String; however, it is not intended to be human‐readable. See the GraphQL Specification.
• :integer - Represents a signed 32‐bit numeric non‐fractional value, greater than or equal to -2^31 and less than 2^31. Note that Absinthe uses the full word :integer to identify this type, but its name (used by variables, for instance), is "Int". See the GraphQL Specification.
• :string - Represents textual data, represented as UTF‐8 character sequences. The String type is most often used by GraphQL to represent free‐form human‐readable text. See the GraphQL Specification.

Examples

Supporting a time format in ISOz format, using Timex:

use Absinthe.Field.Definitions
# Also loaded by `use Absinthe.Field.Schema`

@absinthe :type
def time do
  %Absinthe.Type.Scalar{
    description: "Time (in ISOz format)",
    parse: &Timex.DateFormat.parse(&1, "{ISOz}"),
    serialize: &Timex.DateFormat.format!(&1, "{ISOz}")
  }
end