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The PostgreSQL data layer for Ash Framework
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Files
lib/migration_generator/phase.ex
# SPDX-FileCopyrightText: 2019 ash_postgres contributors <https://github.com/ash-project/ash_postgres/graphs.contributors>
#
# SPDX-License-Identifier: MIT
defmodule AshPostgres.MigrationGenerator.Phase do
@moduledoc false
defmodule Create do
@moduledoc false
defstruct [:table, :schema, :multitenancy, :repo, operations: [], commented?: false]
import AshPostgres.MigrationGenerator.Operation.Helper, only: [as_atom: 1]
def up(%{
schema: schema,
table: table,
operations: operations,
multitenancy: multitenancy,
repo: repo
}) do
if multitenancy.strategy == :context do
"create table(:#{as_atom(table)}, primary_key: false, prefix: prefix()) do\n" <>
Enum.map_join(operations, "\n", fn operation -> operation.__struct__.up(operation) end) <>
"\nend"
else
pre_create =
if schema && repo.create_schemas_in_migrations?() do
"execute(\"CREATE SCHEMA IF NOT EXISTS #{schema}\")" <> "\n\n"
else
""
end
opts =
if schema do
", prefix: \"#{schema}\""
else
""
end
pre_create <>
"create table(:#{as_atom(table)}, primary_key: false#{opts}) do\n" <>
Enum.map_join(operations, "\n", fn operation -> operation.__struct__.up(operation) end) <>
"\nend"
end
end
def down(%{schema: schema, table: table, multitenancy: multitenancy}) do
if multitenancy.strategy == :context do
"drop table(:#{as_atom(table)}, prefix: prefix())"
else
opts =
if schema do
", prefix: \"#{schema}\""
else
""
end
"drop table(:#{as_atom(table)}#{opts})"
end
end
end
defmodule Alter do
@moduledoc false
defstruct [:schema, :table, :multitenancy, operations: [], commented?: false]
import AshPostgres.MigrationGenerator.Operation.Helper, only: [as_atom: 1]
def up(%{table: table, schema: schema, operations: operations, multitenancy: multitenancy}) do
body =
operations
|> Enum.map_join("\n", fn operation -> operation.__struct__.up(operation) end)
|> String.trim()
if body == "" do
""
else
if multitenancy.strategy == :context do
"alter table(:#{as_atom(table)}, prefix: prefix()) do\n" <>
body <>
"\nend"
else
opts =
if schema do
", prefix: \"#{schema}\""
else
""
end
"alter table(:#{as_atom(table)}#{opts}) do\n" <>
body <>
"\nend"
end
end
end
def down(%{table: table, schema: schema, operations: operations, multitenancy: multitenancy}) do
body =
operations
|> Enum.reverse()
|> Enum.map_join("\n", fn operation -> operation.__struct__.down(operation) end)
|> String.trim()
if body == "" do
""
else
if multitenancy.strategy == :context do
"alter table(:#{as_atom(table)}, prefix: prefix()) do\n" <>
body <>
"\nend"
else
opts =
if schema do
", prefix: \"#{schema}\""
else
""
end
"alter table(:#{as_atom(table)}#{opts}) do\n" <>
body <>
"\nend"
end
end
end
end
end