c740445ad3
There are currently two cops for this: * Migration/AddIndex: checks if indexes are added concurrently * Migration/ColumnWithDefault: checks if columns with default values are added in a concurrent manner Both cops are fairly simple and make no attempt at correcting the code as this is quite hard to do (e.g. modifications may need to be applied in various places in the same file). They however should provide enough to catch people ignoring the comments in generated migrations telling them to use add_concurrent_index or add_column_with_default.
46 lines
1.2 KiB
Ruby
46 lines
1.2 KiB
Ruby
module RuboCop
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module Cop
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module Migration
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# Cop that checks if indexes are added in a concurrent manner.
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class AddIndex < RuboCop::Cop::Cop
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include MigrationHelpers
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MSG = 'add_index requires downtime, use add_concurrent_index instead'
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def on_def(node)
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return unless in_migration?(node)
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new_tables = []
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node.each_descendant(:send) do |send_node|
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first_arg = first_argument(send_node)
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# The first argument of "create_table" / "add_index" is the table
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# name.
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new_tables << first_arg if create_table?(send_node)
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next if method_name(send_node) != :add_index
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# Using "add_index" is fine for newly created tables as there's no
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# data in these tables yet.
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next if new_tables.include?(first_arg)
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add_offense(send_node, :selector)
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end
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end
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def create_table?(node)
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method_name(node) == :create_table
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end
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def method_name(node)
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node.children[1]
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end
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def first_argument(node)
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node.children[2] ? node.children[0] : nil
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end
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end
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end
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end
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end
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