64 lines
2.0 KiB
Ruby
64 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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# This abstract class is used for models which need to exist in multiple de-composed databases.
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class SharedModel < ActiveRecord::Base
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self.abstract_class = true
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# if shared model is used, this allows to limit connections
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# on which this model is being shared
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class_attribute :limit_connection_names, default: nil
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class << self
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def using_connection(connection)
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previous_connection = self.overriding_connection
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unless previous_connection.nil? || previous_connection.equal?(connection)
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raise "Cannot change connection for Gitlab::Database::SharedModel "\
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"from '#{Gitlab::Database.db_config_name(previous_connection)}' "\
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"to '#{Gitlab::Database.db_config_name(connection)}'"
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end
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# connection might not be yet adopted (returning nil, and no gitlab_schemas)
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# in such cases it is fine to ignore such connections
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gitlab_schemas = Gitlab::Database.gitlab_schemas_for_connection(connection)
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unless gitlab_schemas.nil? || gitlab_schemas.include?(:gitlab_shared)
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raise "Cannot set `SharedModel` to connection from `#{Gitlab::Database.db_config_name(connection)}` " \
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"since this connection does not include `:gitlab_shared` schema."
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end
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self.overriding_connection = connection
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yield
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ensure
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self.overriding_connection = previous_connection
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end
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def connection
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if connection = self.overriding_connection
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connection
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else
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super
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end
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end
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private
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def overriding_connection
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Thread.current[:overriding_connection]
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end
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def overriding_connection=(connection)
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Thread.current[:overriding_connection] = connection
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end
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end
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def connection_db_config
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self.class.connection_db_config
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end
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end
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end
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end
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