mirror of
https://github.com/ash-project/ash_postgres.git
synced 2024-09-20 21:43:12 +12:00
401 lines
12 KiB
Elixir
401 lines
12 KiB
Elixir
defmodule AshPostgres.MigrationGenerator.Operation do
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@moduledoc false
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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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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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table: table,
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destination_field: destination_field,
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multitenancy: %{strategy: :attribute, attribute: destination_attribute}
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}
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} = attribute
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}) do
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"add #{inspect(attribute.name)}, references(#{inspect(table)}, type: #{
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inspect(attribute.type)
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}, column: #{inspect(destination_field)}, with: [#{source_attribute}: :#{
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destination_attribute
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}]), default: #{attribute.default}, primary_key: #{attribute.primary_key?}"
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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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table: table,
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destination_field: destination_field,
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multitenancy: %{strategy: :attribute}
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}
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} = attribute
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}) do
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"add #{inspect(attribute.name)}, references(#{inspect(table)}, type: #{
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inspect(attribute.type)
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}, column: #{inspect(destination_field)}, name: \"\#\{prefix\}_#{table}_#{attribute.name}_fkey\", prefix: \"public\"), default: #{
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attribute.default
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}, primary_key: #{attribute.primary_key?}"
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end
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def up(%{
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multitenancy: %{strategy: :attribute},
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table: current_table,
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attribute:
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%{
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references: %{
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table: table,
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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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Mix.shell().info("""
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table `#{current_table}` with attribute multitenancy refers to table `#{table}` with schema based multitenancy.
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This means that it is not possible to use a foreign key. This is not necessarily a problem, just something
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you should be aware of
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""")
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"add #{inspect(attribute.name)}, #{inspect(attribute.type)}, default: #{attribute.default}, primary_key: #{
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attribute.primary_key?
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}"
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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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%{references: %{table: table, destination_field: destination_field}} = attribute
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}) do
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"add #{inspect(attribute.name)}, references(#{inspect(table)}, type: #{
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inspect(attribute.type)
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}, column: #{inspect(destination_field)}, name: \"\#\{prefix\}_#{table}_#{attribute.name}_fkey\"), default: #{
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attribute.default
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}, primary_key: #{attribute.primary_key?}"
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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}} = attribute
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}) do
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"add #{inspect(attribute.name)}, references(#{inspect(table)}, type: #{
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inspect(attribute.type)
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}, column: #{inspect(destination_field)}), default: #{attribute.default}, primary_key: #{
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attribute.primary_key?
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}"
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end
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def up(%{attribute: attribute}) do
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"add #{inspect(attribute.name)}, #{inspect(attribute.type)}, null: #{attribute.allow_nil?}, default: #{
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attribute.default
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}, primary_key: #{attribute.primary_key?}"
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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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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(%{strategy: :context}, %{
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type: type,
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name: name,
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references: %{
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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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}
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}) do
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"references(#{inspect(table)}, type: #{inspect(type)}, column: #{inspect(destination_field)}, name: \"\#\{prefix\}_#{
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table
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}_#{name}_fkey\")"
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end
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defp reference(%{strategy: :attribute, attribute: source_attribute}, %{
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type: type,
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references: %{
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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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}
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}) do
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"references(#{inspect(table)}, type: #{inspect(type)}, column: #{inspect(destination_field)}, with: [#{
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source_attribute
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}: :#{destination_attribute}])"
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end
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defp reference(_, %{
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type: type,
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references: %{
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table: table,
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destination_field: destination_field
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}
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}) do
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"references(#{inspect(table)}, type: #{inspect(type)}, column: #{inspect(destination_field)})"
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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(%{attribute: attribute, table: table, multitenancy: multitenancy, direction: :up}) do
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if multitenancy && multitenancy.strategy == :context do
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"drop constraint(:#{table}, \"\#\{prefix\}_#{table}_#{attribute.name}_fkey\")"
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else
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"drop constraint(:#{table}, \"#{table}_#{attribute.name}_fkey\")"
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end
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end
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def up(_), do: ""
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def down(%{attribute: attribute, table: table, multitenancy: multitenancy, direction: :down}) do
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if multitenancy && multitenancy.strategy == :context do
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"drop constraint(:#{table}, \"\#\{prefix\}_#{table}_#{attribute.name}_fkey\")"
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else
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"drop constraint(:#{table}, \"#{table}_#{attribute.name}_fkey\")"
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end
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end
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def down(_), do: ""
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end
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defmodule RenameAttribute do
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@moduledoc false
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defstruct [:old_attribute, :new_attribute, :table, :multitenancy, :old_multitenancy]
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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},
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table: table,
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multitenancy: multitenancy
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}) do
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{name_prefix, keys} =
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case multitenancy.strategy do
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:context ->
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{"\#\{prefix\}_", keys}
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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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if base_filter do
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"create unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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name_prefix
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}#{table}_#{name}_unique_index\", 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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name_prefix
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}#{table}_#{name}_unique_index\")"
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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},
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table: table,
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multitenancy: multitenancy
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}) do
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{name_prefix, keys} =
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case multitenancy.strategy do
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:context ->
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{"\#\{prefix\}_", keys}
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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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"drop_if_exists unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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name_prefix
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}#{table}_#{name}_unique_index\")"
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end
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end
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defmodule RemoveUniqueIndex 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(%{identity: %{name: name, keys: keys}, table: table, old_multitenancy: multitenancy}) do
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{name_prefix, keys} =
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case multitenancy.strategy do
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:context ->
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{"\#\{prefix\}_", keys}
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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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"drop_if_exists unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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name_prefix
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}#{table}_#{name}_unique_index\")"
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end
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def down(%{
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identity: %{name: name, keys: keys, base_filter: base_filter},
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table: table,
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multitenancy: multitenancy
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}) do
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{name_prefix, keys} =
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case multitenancy.strategy do
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:context ->
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{"\#\{prefix\}_", keys}
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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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if base_filter do
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"create unique_index(:#{table}, [#{Enum.map_join(keys, ",", &inspect/1)}], name: \"#{
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name_prefix
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}#{table}_#{name}_unique_index\", 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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name_prefix
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}#{table}_#{name}_unique_index\")"
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end
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end
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end
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end
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