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Contents
module Impressionist
module CounterCache
attr_reader :impressionable_class, :entity
private
# A valid impression must
# have a valid impressionable class
# be counter_caching
# have a record saved in the db
# then it should give it a try
def impressionable_counter_cache_updatable?
updatable? && impressionable_try
end
def updatable?
valid_impressionable_class? && impressionable_find
end
def valid_impressionable_class?
set_impressionable_class && counter_caching?
end
def set_impressionable_class
klass = self.impressionable_type || false
@impressionable_class = klass.
to_s.safe_constantize || false
end
def impressionist_log(str, mode=:error)
Rails.logger.send(mode.to_s, str)
end
# receives an entity(instance of a Model) and then tries to update
# counter_cache column
# entity is a impressionable instance model
def impressionable_try
entity.try(:update_impressionist_counter_cache)
end
def impressionable_find
exeception_rescuer {
@entity = impressionable_class.find(self.impressionable_id)
}
@entity
end
def counter_caching?
impressionable_class.
impressionist_counter_caching?
end
# Returns false, as it is only handling one exeception
# It would make updatable to fail thereafter it would not try
# to update cache_counter
def exeception_rescuer
begin
yield
rescue ActiveRecord::RecordNotFound
exeception_to_log
false
end
end
def exeception_to_log
impressionist_log("Couldn't find Widget with id=#{self.impressionable_id}")
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems