50 lines
		
	
	
	
		
			1.3 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
			
		
		
	
	
			50 lines
		
	
	
	
		
			1.3 KiB
		
	
	
	
		
			Elixir
		
	
	
	
	
	
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Repo do
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  use Ecto.Repo,
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    otp_app: :pleroma,
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    adapter: Ecto.Adapters.Postgres,
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    migration_timestamps: [type: :naive_datetime_usec]
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  defmodule Instrumenter do
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    use Prometheus.EctoInstrumenter
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  end
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  @doc """
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  Dynamically loads the repository url from the
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  DATABASE_URL environment variable.
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  """
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  def init(_, opts) do
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    {:ok, Keyword.put(opts, :url, System.get_env("DATABASE_URL"))}
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  end
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  @doc "find resource based on prepared query"
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  @spec find_resource(Ecto.Query.t()) :: {:ok, struct()} | {:error, :not_found}
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  def find_resource(%Ecto.Query{} = query) do
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    case __MODULE__.one(query) do
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      nil -> {:error, :not_found}
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      resource -> {:ok, resource}
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    end
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  end
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  def find_resource(_query), do: {:error, :not_found}
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  @doc """
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  Gets association from cache or loads if need
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  ## Examples
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    iex> Repo.get_assoc(token, :user)
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    %User{}
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  """
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  @spec get_assoc(struct(), atom()) :: {:ok, struct()} | {:error, :not_found}
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  def get_assoc(resource, association) do
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    case __MODULE__.preload(resource, association) do
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      %{^association => assoc} when not is_nil(assoc) -> {:ok, assoc}
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      _ -> {:error, :not_found}
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    end
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  end
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end
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