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RSpec.describe ActiveRecord::Schema do
it "uses type `bigint` for primary and foreign keys" do
expect('db/schema.rb').to use_bigint_keys
end
end
RSpec::Matchers.define :use_bigint_keys do
match do |filename|
@non_bigint_primary_keys = []
@non_bigint_foreign_keys = []
File.open(filename, 'r') do |f|
@non_bigint_primary_keys = f
.grep(/create_table /)
.grep_v(/id: (:bigserial|false)/)
f.rewind
@non_bigint_foreign_keys = f
.grep(/t\.integer +"\w+_id"/)
.grep_v(/limit: 8/)
end
@non_bigint_primary_keys.empty? && @non_bigint_foreign_keys.empty?
end
failure_message do |filename|
<<~EOS
expected #{filename.inspect} to use bigint keys
Diff: #{diff}
EOS
end
def diff
RSpec::Support::Differ.new(
color: RSpec::Matchers.configuration.color?
).diff(@non_bigint_primary_keys + @non_bigint_foreign_keys, [])
end
end
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