Kevin McConnell
19 lines
616 B
Ruby
19 lines
616 B
Ruby
module Deployment
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class DatabaseResolver < ActiveRecord::Middleware::DatabaseSelector::Resolver
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def self.in_primary_datacenter?
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ENV["PRIMARY_DATACENTER"].present? || Rails.env.local?
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end
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def reading_request?(request)
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# Disables writes (and so primary-DB stickiness) in non-primary datacenters
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super || !DatabaseResolver.in_primary_datacenter?
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end
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private
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def read_from_primary?
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# Only the primary datacenter can read from the primary database, non-primary DCs have local DB replicas
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super && DatabaseResolver.in_primary_datacenter?
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end
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end
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end
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