Module: Quiver::Adapter::Memory

Includes:
HelpersHelpers
Defined in:
lib/quiver/adapter/memory_helpers.rb,
lib/quiver/adapter/memory_uuid_primary_key.rb

Defined Under Namespace

Modules: ClassMethods, UuidPrimaryKey

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(host) ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 8

def self.included(host)
  super

  host.adapter_type(:memory)
  host.send(:extend, ClassMethods)
end

Instance Method Details

#count ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 33

def count
  count = stores.get(store_key).count

  Quiver::Adapter::AdapterResult.new(count)
end

#create(attributes, transaction) ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 39

def create(attributes, transaction)
  primary_key = new_primary_key

  if attributes[:__type__]
    attributes = attributes.merge(
      primary_key_name => primary_key,
      attributes[:__type__][:name] => attributes[:__type__][:value]
    )

    attributes.delete(:__type__)
  else
    attributes = attributes.merge(
      primary_key_name => primary_key
    )
  end

  store[primary_key] = attributes

  Quiver::Adapter::AdapterResult.new(attributes.dup)
end

#find(primary_key) ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 22

def find(primary_key)
  Quiver::Adapter::AdapterResult.new do |errors|
    if store.key?(primary_key)
      load_additional([store[primary_key].dup]).first
    else
      errors << Quiver::Mapper::NotFoundError.new('record', 'not_found')
      nil
    end
  end
end

#hard_delete(attributes, transaction) ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 81

def hard_delete(attributes, transaction)
  store = stores.get(store_key)

  Quiver::Adapter::AdapterResult.new do |errors|
    object = store.delete(attributes[primary_key_name])

    if object
      {}
    else
      errors << Quiver::Mapper::NotFoundError.new('record', 'not_found')
      nil
    end
  end
end

#query(q = {}) ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 96

def query(q={})
  store = stores.get(store_key)

  filter_params = q[:filter] || {}
  sort_params = q[:sort] || {}
  pagination_params = q[:page] || {}

  objects = filter_klass.new(
    store.values,
    filter_params
  ).filter

  if sort_params.any?
    objects = objects.sort do |a, b|
      sort_params.reduce(0) do |memo, (attr, asc)|
        attr = attr.to_sym

        # A memo of 0 means either no sorting has happened yet,
        # or there has been a tie that might need breaking.
        if memo == 0
          sign = asc ? 1 : -1
          sign * (a[attr] <=> b[attr])
        else
          memo
        end
      end
    end
  end

  offset = pagination_params['offset'] || 0
  limit  = pagination_params['limit'] || -1
  total_count = objects.count

  if limit == -1
    range_end = -1
  else
    range_end = offset + limit - 1
  end
  objects = objects[offset..range_end]

  objects = load_additional(objects.map do |attrs|
    attrs.dup
  end)

  result = Quiver::Adapter::AdapterResult.new(objects)

  if pagination_params.any?
    result.data[:pagination_offset] = offset
    result.data[:pagination_limit] = limit
    result.data[:total_count] = total_count
  end

  result
end

#update(attributes, transaction) ⇒ Object 



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# File 'lib/quiver/adapter/memory_helpers.rb', line 60

def update(attributes, transaction)
  primary_key = attributes[primary_key_name]

  if attributes[:__type__]
    attributes = attributes.merge(
      attributes[:__type__][:name] => attributes[:__type__][:value]
    )

    attributes.delete(:__type__)
  end

  Quiver::Adapter::AdapterResult.new do |errors|
    if store.key?(primary_key)
      store[primary_key] = attributes.dup
    else
      errors << Quiver::Mapper::NotFoundError.new('record', 'does_not_exist')
      nil
    end
  end
end