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48 lines
1.3 KiB
Elixir
48 lines
1.3 KiB
Elixir
defmodule AshPostgres.Repo do
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@moduledoc """
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Resources that use the `AshPostgres` data layer use a `Repo` to access the database.
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This repo is a slightly modified version of an `Ecto.Repo`.
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You can use `Ecto.Repo`'s `init/2` to configure your repo like normal, but
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instead of returning `{:ok, config}`, use `super(config)` to pass the
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configuration to the `AshPostgres.Repo` implementation.
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Currently the only additional configuration supported is `installed_extensions`,
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and the only extension that ash_postgres reacts to is `"pg_trgm"`. If this extension
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is installed, then the `AshPostgres.Predicates.Trigram` custom predicate will be
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available.
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```
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def installed_extensions() do
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["pg_trgm"]
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end
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```
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"""
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@doc "Use this to inform the data layer about what extensions are installed"
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@callback installed_extensions() :: [String.t()]
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defmacro __using__(opts) do
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quote bind_quoted: [opts: opts] do
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otp_app = opts[:otp_app] || raise("Must configure OTP app")
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use Ecto.Repo,
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adapter: Ecto.Adapters.Postgres,
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otp_app: otp_app
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def installed_extensions do
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[]
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end
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def init(_, config) do
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new_config = Keyword.put(config, :installed_extensions, installed_extensions())
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{:ok, new_config}
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end
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defoverridable installed_extensions: 0
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end
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end
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end
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