46 lines
1.2 KiB
Ruby
46 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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# Checks which `ignored_columns` can be safely removed by scanning
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# the current schema for all `ApplicationRecord` descendants.
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class ObsoleteIgnoredColumns
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def initialize(base = ApplicationRecord)
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@base = base
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end
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def execute
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@base.descendants.map do |klass|
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next if klass.abstract_class?
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safe_to_remove = ignored_columns_safe_to_remove_for(klass)
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next if safe_to_remove.empty?
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[klass.name, safe_to_remove]
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end.compact.sort_by(&:first)
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end
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private
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def ignored_columns_safe_to_remove_for(klass)
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ignores = ignored_and_not_present(klass).each_with_object({}) do |col, h|
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h[col] = klass.ignored_columns_details[col.to_sym]
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end
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ignores.select { |_, i| i&.safe_to_remove? }
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end
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def ignored_and_not_present(klass)
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ignored = klass.ignored_columns.map(&:to_s)
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return [] if ignored.empty?
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schema = klass.connection.schema_cache.columns_hash(klass.table_name)
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existing = schema.values.map(&:name)
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used = ignored & existing
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ignored - used
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end
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end
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end
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end
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