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# frozen_string_literal: true
require "active_record/scoping/default"
require "active_record/scoping/named"
module ActiveRecord
# This class is used to create a table that keeps track of values and keys such
# as which environment migrations were run in.
#
# This is enabled by default. To disable this functionality set
# `use_metadata_table` to false in your database configuration.
class InternalMetadata < ActiveRecord::Base # :nodoc:
self.record_timestamps = true
class << self
def enabled?
ActiveRecord::Base.connection.use_metadata_table?
end
def _internal?
true
end
def primary_key
"key"
end
def table_name
"#{table_name_prefix}#{internal_metadata_table_name}#{table_name_suffix}"
end
def []=(key, value)
return unless enabled?
find_or_initialize_by(key: key).update!(value: value)
end
def [](key)
return unless enabled?
where(key: key).pluck(:value).first
end
# Creates an internal metadata table with columns +key+ and +value+
def create_table
return unless enabled?
unless connection.table_exists?(table_name)
connection.create_table(table_name, id: false) do |t|
t.string :key, **connection.internal_string_options_for_primary_key
t.string :value
t.timestamps
end
end
end
def drop_table
return unless enabled?
connection.drop_table table_name, if_exists: true
end
end
end
end
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