Class: BetterParams::ParamsDestroyInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/better_params/params_destroy_info.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.add(*args) ⇒ Object 



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# File 'lib/better_params/params_destroy_info.rb', line 3

def self.add(*args)
  new.add(*args)
end

Instance Method Details

#add(original_params, object, *keys) ⇒ Object

For all has_many relations from a keys array adds information about destroying objects by an algorythm: If a nested object doesn’t exists in a passed object it will be destroyed.



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# File 'lib/better_params/params_destroy_info.rb', line 10

def add(original_params, object, *keys)
  return original_params if object.nil?

  # Process every key and merge updated information to params
  prepare_keys(keys).reduce(original_params) do |params, (key, nested_keys)|
    # Don't needs to process key if params is not passed
    nested_params = params[key]
    next params if nested_params.nil?

    # Try to fetch relation value
    relation = object.public_send(relation_key(key))

    # Can't process key if a nested object doesn't exists
    next params if relation.nil?

    if relation.is_a? Enumerable
      # If a relation is a has_many, needs to add information about destroying
      nested_params = add_destroy_info(nested_params, relation)

      # Needs to go deeper to the every object in an array if has nested keys
      unless nested_keys.nil?
        nested_params = add_nested_destroy_info(
          nested_params, relation, nested_keys
        )
      end
    else
      # If a relation is a single object we needs to go deeper
      nested_params = add(nested_params, relation, *nested_keys)
    end

    next params.merge(key => nested_params)
  end
end