Module: QueryDam

Defined in:
lib/query_dam.rb,
lib/query_dam/version.rb,
lib/query_dam/concerns/trackable.rb

Defined Under Namespace

Modules: Trackable

Constant Summary collapse

QUERY_EXPIRE = 
5.minutes
VERSION = 
'0.1.0'

Class Method Summary collapse

Class Method Details

.exclusions_set(key) ⇒ Object 



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# File 'lib/query_dam.rb', line 44

def exclusions_set(key)
  Redis::Set.new("#{key}-exclusions")
end

.get_updates(key) ⇒ Object 



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# File 'lib/query_dam.rb', line 23

def get_updates(key)
  query_hash = Redis::HashKey.new(key)
  return nil unless query_hash.exists?

  model = query_hash[:model].constantize

  result = {
    model: model,
    updates: model.where(id: updates_set(key).to_a),
    exclusions: exclusions_set(key).to_a.map(&:to_i) }

  updates_set(key).clear
  exclusions_set(key).clear

  result
end

.updates_set(key) ⇒ Object 



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# File 'lib/query_dam.rb', line 40

def updates_set(key)
  Redis::Set.new("#{key}-updates")
end

.watch_relation(relation) ⇒ Object 



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# File 'lib/query_dam.rb', line 13

def watch_relation(relation)
  key = SecureRandom.uuid
  query = relation.where("`#{relation.model.table_name}`.`id` = #{key}").to_sql
  query_hash = Redis::HashKey.new(key)
  query_hash.bulk_set(model: relation.model.name, query: query)
  query_hash.expire(QUERY_EXPIRE)
  Redis::Set.new(relation.model.name) << key
  key
end