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The PostgreSQL data layer for Ash Framework
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lib/reference.ex
# SPDX-FileCopyrightText: 2019 ash_postgres contributors <https://github.com/ash-project/ash_postgres/graphs/contributors>
#
# SPDX-License-Identifier: MIT
defmodule AshPostgres.Reference do
@moduledoc "Represents the configuration of a reference (i.e foreign key)."
defstruct [
:relationship,
:on_delete,
:on_update,
:name,
:match_with,
:match_type,
:deferrable,
:index?,
:__spark_metadata__,
ignore?: false
]
def schema do
[
relationship: [
type: :atom,
required: true,
doc: "The relationship to be configured"
],
ignore?: [
type: :boolean,
doc:
"If set to true, no reference is created for the given relationship. This is useful if you need to define it in some custom way"
],
on_delete: [
type:
{:or,
[
{:one_of, [:delete, :nilify, :nothing, :restrict]},
{:tagged_tuple, :nilify, {:wrap_list, :atom}}
]},
doc: """
What should happen to records of this resource when the referenced record of the *destination* resource is deleted.
"""
],
on_update: [
type: {:one_of, [:update, :nilify, :nothing, :restrict]},
doc: """
What should happen to records of this resource when the referenced destination_attribute of the *destination* record is update.
"""
],
deferrable: [
type: {:one_of, [false, true, :initially]},
default: false,
doc: """
Whether or not the constraint is deferrable. This only affects the migration generator.
"""
],
name: [
type: :string,
doc:
"The name of the foreign key to generate in the database. Defaults to <table>_<source_attribute>_fkey"
],
match_with: [
type: :non_empty_keyword_list,
doc:
"Defines additional keys to the foreign key in order to build a composite foreign key. The key should be the name of the source attribute (in the current resource), the value the name of the destination attribute."
],
match_type: [
type: {:one_of, [:simple, :partial, :full]},
doc: "select if the match is `:simple`, `:partial`, or `:full`"
],
index?: [
type: :boolean,
default: false,
doc: "Whether to create or not a corresponding index"
]
]
end
end