mirror of
https://github.com/ash-project/ash_postgres.git
synced 2024-09-20 13:33:50 +12:00
702 lines
19 KiB
Elixir
702 lines
19 KiB
Elixir
defmodule AshPostgres.MigrationGenerator.Operation do
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@moduledoc false
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defmodule Helper do
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@moduledoc false
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def join(list),
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do:
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list
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|> List.flatten()
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|> Enum.reject(&is_nil/1)
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|> Enum.join(", ")
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|> String.replace(", )", ")")
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def maybe_add_default("nil"), do: nil
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def maybe_add_default(value), do: "default: #{value}"
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def maybe_add_primary_key(true), do: "primary_key: true"
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def maybe_add_primary_key(_), do: nil
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def maybe_add_null(false), do: "null: false"
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def maybe_add_null(_), do: nil
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def on_delete(%{on_delete: on_delete}) when on_delete in [:delete, :nilify] do
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"on_delete: :#{on_delete}_all"
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end
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def on_delete(%{on_delete: on_delete}) when is_atom(on_delete) and not is_nil(on_delete) do
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"on_delete: :#{on_delete}"
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end
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def on_delete(_), do: nil
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def on_update(%{on_update: on_update}) when on_update in [:update, :nilify] do
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"on_update: :#{on_update}_all"
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end
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def on_update(%{on_update: on_update}) when is_atom(on_update) and not is_nil(on_update) do
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"on_update: :#{on_update}"
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end
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def on_update(_), do: nil
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def reference_type(
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%{type: :integer},
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%{destination_field_generated: true, destination_field_default: "nil"}
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) do
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:bigint
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end
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def reference_type(%{type: type}, _) do
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type
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end
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end
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defmodule CreateTable do
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@moduledoc false
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defstruct [:table, :multitenancy, :old_multitenancy]
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end
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defmodule AddAttribute do
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@moduledoc false
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defstruct [:attribute, :table, :multitenancy, :old_multitenancy]
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import Helper
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def up(%{
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multitenancy: %{strategy: :attribute, attribute: source_attribute},
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attribute:
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%{
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references:
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%{
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table: table,
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destination_field: destination_field,
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multitenancy: %{strategy: :attribute, attribute: destination_attribute}
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} = reference
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} = attribute
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}) do
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[
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"add #{inspect(attribute.name)}",
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"references(:#{table}",
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[
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"column: #{inspect(destination_field)}",
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"with: [#{source_attribute}: :#{destination_attribute}]",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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on_delete(reference),
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on_update(reference)
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],
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")",
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?),
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maybe_add_null(attribute.allow_nil?)
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]
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|> join()
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end
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def up(%{
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multitenancy: %{strategy: :context},
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attribute:
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%{
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references:
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%{
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table: table,
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destination_field: destination_field,
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multitenancy: %{strategy: :attribute}
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} = reference
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} = attribute
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}) do
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[
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"add #{inspect(attribute.name)}",
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"references(:#{table}",
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[
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"column: #{inspect(destination_field)}",
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"prefix: \"public\"",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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on_delete(reference),
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on_update(reference)
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],
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")",
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?),
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maybe_add_null(attribute.allow_nil?)
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]
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|> join()
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end
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def up(%{
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multitenancy: %{strategy: :attribute},
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attribute:
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%{
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references: %{
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multitenancy: %{strategy: :context}
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}
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} = attribute
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}) do
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[
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"add #{inspect(attribute.name)}",
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inspect(attribute.type),
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?),
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maybe_add_null(attribute.allow_nil?)
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]
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|> join()
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end
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def up(%{
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multitenancy: %{strategy: :context},
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attribute:
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%{
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references:
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%{
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multitenancy: %{strategy: :context},
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table: table,
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destination_field: destination_field
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} = reference
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} = attribute
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}) do
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[
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"add #{inspect(attribute.name)}",
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"references(:#{table}",
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[
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"column: #{inspect(destination_field)}",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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"prefix: prefix()",
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on_delete(reference),
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on_update(reference)
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],
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")",
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?),
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maybe_add_null(attribute.allow_nil?)
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]
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|> join()
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end
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def up(%{
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multitenancy: %{strategy: :context},
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attribute:
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%{
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references:
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%{
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table: table,
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destination_field: destination_field
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} = reference
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} = attribute
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}) do
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[
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"add #{inspect(attribute.name)}",
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"references(:#{table}",
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[
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"column: #{inspect(destination_field)}",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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"prefix: \"public\"",
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on_delete(reference),
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on_update(reference)
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],
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")",
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?),
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maybe_add_null(attribute.allow_nil?)
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]
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|> join()
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end
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def up(%{
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attribute:
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%{references: %{table: table, destination_field: destination_field} = reference} =
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attribute
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}) do
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[
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"add #{inspect(attribute.name)}",
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"references(:#{table}",
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[
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"column: #{inspect(destination_field)}",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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on_delete(reference),
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on_update(reference)
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],
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")",
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?),
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maybe_add_null(attribute.allow_nil?)
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]
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|> join()
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end
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def up(%{attribute: %{type: :bigint, default: "nil", generated?: true} = attribute}) do
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[
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"add #{inspect(attribute.name)}",
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":bigserial",
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maybe_add_null(attribute.allow_nil?),
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maybe_add_primary_key(attribute.primary_key?)
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]
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|> join()
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end
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def up(%{attribute: %{type: :integer, default: "nil", generated?: true} = attribute}) do
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[
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"add #{inspect(attribute.name)}",
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":serial",
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maybe_add_null(attribute.allow_nil?),
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maybe_add_primary_key(attribute.primary_key?)
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]
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|> join()
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end
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def up(%{attribute: attribute}) do
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[
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"add #{inspect(attribute.name)}",
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"#{inspect(attribute.type)}",
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maybe_add_null(attribute.allow_nil?),
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maybe_add_default(attribute.default),
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maybe_add_primary_key(attribute.primary_key?)
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]
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|> join()
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end
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def down(
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%{
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attribute: attribute,
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table: table,
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multitenancy: multitenancy
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} = op
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) do
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AshPostgres.MigrationGenerator.Operation.RemoveAttribute.up(%{
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op
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| attribute: attribute,
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table: table,
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multitenancy: multitenancy
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})
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end
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end
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defmodule AlterAttribute do
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@moduledoc false
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defstruct [:old_attribute, :new_attribute, :table, :multitenancy, :old_multitenancy]
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import Helper
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defp alter_opts(attribute, old_attribute) do
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primary_key =
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if attribute.primary_key? and !old_attribute.primary_key? do
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", primary_key: true"
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end
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default =
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if attribute.default != old_attribute.default do
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if is_nil(attribute.default) do
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", default: nil"
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else
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", default: #{attribute.default}"
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end
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end
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null =
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if attribute.allow_nil? != old_attribute.allow_nil? do
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", null: #{attribute.allow_nil?}"
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end
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"#{null}#{default}#{primary_key}"
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end
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def up(%{
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multitenancy: multitenancy,
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old_attribute: old_attribute,
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new_attribute: attribute
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}) do
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type_or_reference =
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if AshPostgres.MigrationGenerator.has_reference?(multitenancy, attribute) and
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Map.get(old_attribute, :references) != Map.get(attribute, :references) do
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reference(multitenancy, attribute)
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else
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inspect(attribute.type)
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end
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"modify #{inspect(attribute.name)}, #{type_or_reference}#{
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alter_opts(attribute, old_attribute)
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}"
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end
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defp reference(
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%{strategy: :context},
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%{
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references:
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%{
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multitenancy: %{strategy: :context},
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table: table,
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destination_field: destination_field
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} = reference
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} = attribute
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) do
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join([
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"references(:#{table}, column: #{inspect(destination_field)}",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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"prefix: prefix()",
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on_delete(reference),
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on_update(reference),
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")"
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])
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end
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defp reference(
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%{strategy: :attribute, attribute: source_attribute},
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%{
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references:
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%{
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multitenancy: %{strategy: :attribute, attribute: destination_attribute},
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table: table,
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destination_field: destination_field
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} = reference
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} = attribute
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) do
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join([
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"references(:#{table}, column: #{inspect(destination_field)}, with: [#{source_attribute}: :#{
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destination_attribute
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}]",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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on_delete(reference),
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on_update(reference),
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")"
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])
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end
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defp reference(
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%{strategy: :context},
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%{
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references:
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%{
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table: table,
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destination_field: destination_field
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} = reference
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} = attribute
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) do
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join([
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"references(:#{table}, column: #{inspect(destination_field)}, prefix: \"public\"",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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on_delete(reference),
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on_update(reference),
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")"
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])
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end
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defp reference(
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_,
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%{
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references:
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%{
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table: table,
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destination_field: destination_field
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} = reference
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} = attribute
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) do
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join([
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"references(:#{table}, column: #{inspect(destination_field)}",
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"name: #{inspect(reference.name)}",
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"type: #{inspect(reference_type(attribute, reference))}",
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on_delete(reference),
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on_update(reference),
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")"
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])
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end
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def down(op) do
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up(%{
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op
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| old_attribute: op.new_attribute,
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new_attribute: op.old_attribute,
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old_multitenancy: op.multitenancy,
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multitenancy: op.old_multitenancy
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})
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end
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end
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defmodule DropForeignKey do
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@moduledoc false
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# We only run this migration in one direction, based on the input
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# This is because the creation of a foreign key is handled by `references/3`
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# We only need to drop it before altering an attribute with `references/3`
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defstruct [:attribute, :table, :multitenancy, :direction, no_phase: true]
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def up(%{table: table, attribute: %{references: reference}, direction: :up}) do
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"drop constraint(:#{table}, #{inspect(reference.name)})"
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end
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def up(_) do
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""
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end
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def down(%{table: table, attribute: %{references: reference}, direction: :down}) do
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"drop constraint(:#{table}, #{inspect(reference.name)})"
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end
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def down(_) do
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""
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end
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end
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defmodule RenameAttribute do
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@moduledoc false
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defstruct [
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:old_attribute,
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:new_attribute,
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:table,
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:multitenancy,
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:old_multitenancy,
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no_phase: true
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]
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def up(%{old_attribute: old_attribute, new_attribute: new_attribute, table: table}) do
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"rename table(:#{table}), #{inspect(old_attribute.name)}, to: #{inspect(new_attribute.name)}"
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end
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def down(%{new_attribute: old_attribute, old_attribute: new_attribute, table: table}) do
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"rename table(:#{table}), #{inspect(old_attribute.name)}, to: #{inspect(new_attribute.name)}"
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end
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end
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defmodule RemoveAttribute do
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@moduledoc false
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defstruct [:attribute, :table, :multitenancy, :old_multitenancy, commented?: true]
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def up(%{attribute: attribute, commented?: true}) do
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"""
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# Attribute removal has been commented out to avoid data loss. See the migration generator documentation for more
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# If you uncomment this, be sure to also uncomment the corresponding attribute *addition* in the `down` migration
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# remove #{inspect(attribute.name)}
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"""
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end
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def up(%{attribute: attribute}) do
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"remove #{inspect(attribute.name)}"
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end
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def down(%{attribute: attribute, multitenancy: multitenancy, commented?: true}) do
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prefix = """
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# This is the `down` migration of the statement:
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#
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# remove #{inspect(attribute.name)}
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#
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"""
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contents =
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%AshPostgres.MigrationGenerator.Operation.AddAttribute{
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attribute: attribute,
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multitenancy: multitenancy
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}
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|> AshPostgres.MigrationGenerator.Operation.AddAttribute.up()
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|> String.split("\n")
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|> Enum.map(&"# #{&1}")
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|> Enum.join("\n")
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prefix <> "\n" <> contents
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end
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def down(%{attribute: attribute, multitenancy: multitenancy}) do
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AshPostgres.MigrationGenerator.Operation.AddAttribute.up(
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%AshPostgres.MigrationGenerator.Operation.AddAttribute{
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attribute: attribute,
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multitenancy: multitenancy
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}
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)
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end
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end
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defmodule AddUniqueIndex do
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@moduledoc false
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defstruct [:identity, :table, :multitenancy, :old_multitenancy, no_phase: true]
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def up(%{
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identity: %{name: name, keys: keys, base_filter: base_filter, index_name: index_name},
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table: table,
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multitenancy: multitenancy
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}) do
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keys =
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case multitenancy.strategy do
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:attribute ->
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[multitenancy.attribute | keys]
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_ ->
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keys
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end
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index_name = index_name || "#{table}_#{name}_index"
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if base_filter do
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"create unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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index_name
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}\", where: \"#{base_filter}\")"
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else
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"create unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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index_name
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}\")"
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end
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end
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def down(%{
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identity: %{name: name, keys: keys, index_name: index_name},
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table: table,
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multitenancy: multitenancy
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}) do
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keys =
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case multitenancy.strategy do
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:attribute ->
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[multitenancy.attribute | keys]
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_ ->
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keys
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end
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index_name = index_name || "#{table}_#{name}_index"
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|
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"drop_if_exists unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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index_name
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}\")"
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end
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end
|
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|
|
defmodule RenameUniqueIndex do
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|
@moduledoc false
|
|
defstruct [
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:new_identity,
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:old_identity,
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:table,
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:multitenancy,
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:old_multitenancy,
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no_phase: true
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]
|
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|
|
def up(%{
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old_identity: %{index_name: old_index_name, name: old_name},
|
|
new_identity: %{index_name: new_index_name},
|
|
table: table
|
|
}) do
|
|
old_index_name = old_index_name || "#{table}_#{old_name}_index"
|
|
|
|
"execute(\"ALTER INDEX #{old_index_name} " <>
|
|
"RENAME TO #{new_index_name}\")\n"
|
|
end
|
|
|
|
def down(%{
|
|
old_identity: %{index_name: old_index_name, name: old_name},
|
|
new_identity: %{index_name: new_index_name},
|
|
table: table
|
|
}) do
|
|
old_index_name = old_index_name || "#{table}_#{old_name}_index"
|
|
|
|
"execute(\"ALTER INDEX #{new_index_name} " <>
|
|
"RENAME TO #{old_index_name}\")\n"
|
|
end
|
|
end
|
|
|
|
defmodule RemoveUniqueIndex do
|
|
@moduledoc false
|
|
defstruct [:identity, :table, :multitenancy, :old_multitenancy, no_phase: true]
|
|
|
|
def up(%{
|
|
identity: %{name: name, keys: keys, index_name: index_name},
|
|
table: table,
|
|
old_multitenancy: multitenancy
|
|
}) do
|
|
keys =
|
|
case multitenancy.strategy do
|
|
:attribute ->
|
|
[multitenancy.attribute | keys]
|
|
|
|
_ ->
|
|
keys
|
|
end
|
|
|
|
index_name = index_name || "#{table}_#{name}_index"
|
|
|
|
"drop_if_exists unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
|
|
index_name
|
|
}\")"
|
|
end
|
|
|
|
def down(%{
|
|
identity: %{name: name, keys: keys, base_filter: base_filter, index_name: index_name},
|
|
table: table,
|
|
multitenancy: multitenancy
|
|
}) do
|
|
keys =
|
|
case multitenancy.strategy do
|
|
:attribute ->
|
|
[multitenancy.attribute | keys]
|
|
|
|
_ ->
|
|
keys
|
|
end
|
|
|
|
index_name = index_name || "#{table}_#{name}_index"
|
|
|
|
if base_filter do
|
|
"create unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
|
|
index_name
|
|
}\", where: \"#{base_filter}\")"
|
|
else
|
|
"create unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
|
|
index_name
|
|
}\")"
|
|
end
|
|
end
|
|
end
|
|
|
|
defmodule AddCheckConstraint do
|
|
@moduledoc false
|
|
defstruct [:table, :constraint, :multitenancy, :old_multitenancy, no_phase: true]
|
|
|
|
def up(%{
|
|
constraint: %{
|
|
name: name,
|
|
check: check,
|
|
base_filter: base_filter
|
|
},
|
|
table: table
|
|
}) do
|
|
if base_filter do
|
|
"create constraint(:#{table}, :#{name}, check: \"#{base_filter} AND #{check}\")"
|
|
else
|
|
"create constraint(:#{table}, :#{name}, check: \"#{check}\")"
|
|
end
|
|
end
|
|
|
|
def down(%{
|
|
constraint: %{name: name},
|
|
table: table
|
|
}) do
|
|
"drop_if_exists constraint(:#{table}, :#{name})"
|
|
end
|
|
end
|
|
|
|
defmodule RemoveCheckConstraint do
|
|
@moduledoc false
|
|
defstruct [:table, :constraint, :multitenancy, :old_multitenancy, no_phase: true]
|
|
|
|
def up(%{constraint: %{name: name}, table: table}) do
|
|
"drop_if_exists constraint(:#{table}, :#{name})"
|
|
end
|
|
|
|
def down(%{
|
|
constraint: %{
|
|
name: name,
|
|
check: check,
|
|
base_filter: base_filter
|
|
},
|
|
table: table
|
|
}) do
|
|
if base_filter do
|
|
"create constraint(:#{table}, :#{name}, check: \"#{base_filter} AND #{check}\")"
|
|
else
|
|
"create constraint(:#{table}, :#{name}, check: \"#{check}\")"
|
|
end
|
|
end
|
|
end
|
|
end
|