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module SmartProxyHostExtensions
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extend ActiveSupport::Concern
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module ClassMethods
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# registers a reference to a proxy
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def smart_proxy_reference(hash)
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ProxyReferenceRegistry.add_smart_proxy_reference hash
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end
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def smart_proxy_ids(hosts_scope = Host::Managed.where(nil))
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hosts_scope.eager_load(proxy_join_tables).pluck(proxy_column_list).flatten.uniq.compact
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end
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# table names containing reference to a proxy
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def proxy_join_tables
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proxy_join_references.map(&:join_relation)
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end
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# list of db column names that are used as a reference to a proxy
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def proxy_column_list
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columns = proxy_reference_groups_by_table.map do |table_name, reference_group|
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reference_group.flat_map.with_index do |ref, idx|
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ref.map_column_names idx
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end
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end
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columns.flatten.concat(proxy_self_columns).join(',')
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end
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private
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def proxy_self_columns
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proxy_self_references.map(&:columns_to_s)
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end
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def proxy_reference_groups_by_table
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proxy_join_references_with_reflection.group_by(&:table_name).with_indifferent_access
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end
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def proxy_join_references_with_reflection
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proxy_join_references.select(&:valid?)
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end
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def proxy_join_references
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ProxyReferenceRegistry.smart_proxy_references.select(&:join?)
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end
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def proxy_self_references
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ProxyReferenceRegistry.smart_proxy_references.reject(&:join?)
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end
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end
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end
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