View Source Ash.Type.Struct (ash v3.4.46)

Represents a struct.

Use the instance_of constraint to specify that it must be an instance of a specific struct.

This cannot be loaded from a database unless the instance_of constraint is provided. If not, it can only be used to cast input, i.e for arguments.

Constraints

  • :instance_of (atom/0) - The module the struct should be an instance of

  • :preserve_nil_values? (boolean/0) - If set to true, when storing, nil values will be kept. Otherwise, nil values will be omitted. The default value is false.

  • :fields (keyword/0) - The types of the fields in the struct, and their constraints.
    For example:

    fields:  [
      amount: [
        type: :integer,
        constraints: [
          max: 10
        ]
      ],
      currency: [
        type: :string,
        allow_nil?: false,
        constraints: [
          max_length: 3
        ]
      ]
    ]  

    allow_nil? is true by default

    • :type (an Ash.Type) - Required.

    • :allow_nil? (boolean/0) - The default value is true.

    • :constraints (keyword/0) - The default value is [].

Summary

Functions

field_types(value)

handle_change?()

prepare_change?()