45 lines
972 B
Ruby
45 lines
972 B
Ruby
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# Base class for services that count a single resource such as the number of
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# issues for a project.
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class BaseCountService
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def relation_for_count
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raise(
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NotImplementedError,
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'"relation_for_count" must be implemented and return an ActiveRecord::Relation'
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)
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end
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def count
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Rails.cache.fetch(cache_key, cache_options) { uncached_count }.to_i
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end
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def count_stored?
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Rails.cache.read(cache_key).present?
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end
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def refresh_cache(&block)
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Rails.cache.write(cache_key, block_given? ? yield : uncached_count, raw: raw?)
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end
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def uncached_count
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relation_for_count.count
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end
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def delete_cache
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Rails.cache.delete(cache_key)
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end
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def raw?
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false
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end
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def cache_key
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raise NotImplementedError, 'cache_key must be implemented and return a String'
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end
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# subclasses can override to add any specific options, such as
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# super.merge({ expires_in: 5.minutes })
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def cache_options
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{ raw: raw? }
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end
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end
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