dangerdawson/dryer

Set of small libraries to give ruby a bit of DI love

dryer's Issues

Custom args

So say we have the following situation:

class Variant
  cast: stock_check, class_name: StockCheck
end

class StockCheck
  cast: update_products, class_name: UpdateProduct

  def call
    update_products.call  
  end
end

class UpdateProduct
  def call
    variant.in_stock_cache = true
  end
end

The question I have is how do we get variant down to UpdateProduct, as it will be passed the caster object ( I have renamed the sender object to caster )

We could do this:
1.

class UpdateProduct
  include Dryer::Cast::Target
  def call
    caster.variant.in_stock_cache = true
  end
end

or
2.

class UpdateProduct
  include Dryer::Cast::Target
  delegate :variant to :caster
  def call
    variant.in_stock_cache = true
  end
end

or
3.

class UpdateProduct
  include Dryer::Cast.target(:variant)
  def call
    variant.in_stock_cache = true
  end
end

In the first 2 we would have to make sure that the object we sent to UpdateProduct.new() responded to variant, for option 3 we would have to call UpdateProduct.new with variant as a param

Hence for all of them we would need the framework to do some magic on the caster side e.g

class StockCheck
  cast: update_products, class_name: UpdateProduct, with: [:variant]

  def call
    update_products.call  
  end

  private

  def variant
    caster.variant
  end
end

Do you see the problem?

TODOS

• ~~ change dryer_delegate to cast ~~
• ~~change Dryer::Delegate to ``Dryer::Cast~~
• Find better names for Dryer::Delegate::Send and Dryer::DelegateTarget
• Make sure Dryer::Delegate::Send can be included without arguments
• We need a way to retrieve cast methods eg: .cast_targets || .cast_methods
• Add method ```cast_private```

see [(https://github.com//pull/4)]

Allow nested casts

cast_private :product_parts_updater, class_name: "StockCheck::InStockCache::Update" do
  cast_private :model, class_name: "InStockCache::ProductPart"
end