Module: Card::Fetch::Retrieve

Included in:
Card::Fetch
Defined in:
card/lib/card/fetch/retrieve.rb

Overview

retrieval and instantiation methods for Card::Fetch

Instance Method Summary collapse

Instance Method Details

#id_from_mark ⇒ Object 



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# File 'card/lib/card/fetch/retrieve.rb', line 43

def id_from_mark
  mark_type == :id ? mark_value : Lexicon.id(mark_value)
end

#mark_type ⇒ Object

In both the cache and the db, ids and keys are used to retrieve card data. These methods identify the kind of mark to use and its value



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# File 'card/lib/card/fetch/retrieve.rb', line 49

def mark_type
  @mark_type ||= mark.is_a?(Integer) ? :id : :key
end

#mark_value ⇒ Object 



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# File 'card/lib/card/fetch/retrieve.rb', line 53

def mark_value
  @mark_value ||= mark.is_a?(Integer) ? mark : mark.key
end

#retrieval_from_db_query ⇒ Object 



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# File 'card/lib/card/fetch/retrieve.rb', line 28

def retrieval_from_db_query
  return unless (query = retrieval_from_db_query_base)

  query[:trash] = false unless look_in_trash?
  query
end

#retrieval_from_db_query_base ⇒ Object 



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# File 'card/lib/card/fetch/retrieve.rb', line 35

def retrieval_from_db_query_base
  if mark_type == :key && mark.simple?
    { key: mark_value }
  elsif (id = id_from_mark)
    { id: id }
  end
end

#retrieve_existing ⇒ Object

look for card in cache. if that doesn’t work, look in database



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# File 'card/lib/card/fetch/retrieve.rb', line 6

def retrieve_existing
  return unless mark.present?

  retrieve_from_cache || retrieve_from_db
end

#retrieve_from_cache ⇒ Object 



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# File 'card/lib/card/fetch/retrieve.rb', line 12

def retrieve_from_cache
  @card = Card.send "retrieve_from_cache_by_#{mark_type}",
                    mark_value, @opts[:local_only]
  @card = nil if card&.new? && look_in_trash?
  # don't return cached cards if looking in trash -
  # we want the db version
  card
end

#retrieve_from_db ⇒ Object 



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# File 'card/lib/card/fetch/retrieve.rb', line 21

def retrieve_from_db
  query = retrieval_from_db_query
  @card = query ? Card.where(query).take : nil
  @fresh_from_db = true if card.present? && !card.trash
  card
end