View Source Ash.Resource.Preparation behaviour (ash v2.15.0)

The behaviour for an action-specific query preparation.

init/1 is defined automatically by use Ash.Resource.Preparation, but can be implemented if you want to validate/transform any options passed to the module.

The main function is prepare/3. It takes the changeset, any options that were provided when this change was configured on a resource, and the context, which currently only has the actor.

To access any query arguments from within a preparation, make sure you are using Ash.Query.get_argument/2 as the argument keys may be strings or atoms.

Summary

Types

context()
ref()
t()

Callbacks

init(t)
prepare(query, t, context)

Types

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context()

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@type context() :: %{
  optional(:actor) => Ash.Resource.record(),
  optional(any()) => any()
}
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ref()

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@type ref() :: {module(), Keyword.t()} | module()
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t()

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@type t() :: %Ash.Resource.Preparation{preparation: term()}

Callbacks

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init(t)

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@callback init(Keyword.t()) :: {:ok, Keyword.t()} | {:error, term()}
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prepare(query, t, context)

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@callback prepare(query, Keyword.t(), context()) :: query when query: struct()