Module: NCore::Associations

Defined in:
lib/ncore/associations.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(assoc, class_name: nil) ⇒ Object 



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# File 'lib/ncore/associations.rb', line 84

def belongs_to(assoc, class_name: nil)
  assoc = assoc.to_s
  klass = class_name || "#{module_name}::#{assoc.camelize}"
  class_eval <<-M1, __FILE__, __LINE__+1
    attr :#{assoc}_id
    def #{assoc}(params={})
      return nil unless #{assoc}_id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      if params.except(:credentials, :request).empty?
        # only cache unfiltered, default api call
        @attribs[:#{assoc}] ||= #{klass}.find(#{assoc}_id, params)
      else
        #{klass}.find(#{assoc}_id, params)
      end
    end
  M1
  class_eval <<-M2, __FILE__, __LINE__+1
    def #{assoc}_id=(v)
      @attribs[:#{assoc}] = nil unless @attribs[:#{assoc}_id] == v
      @attribs[:#{assoc}_id] = v
    end
    private :#{assoc}_id=
  M2
end

#has_many(assoc, class_name: nil) ⇒ Object 



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# File 'lib/ncore/associations.rb', line 4

def has_many(assoc, class_name: nil)
  assoc = assoc.to_s
  klass = class_name || "#{module_name}::#{assoc.camelize.singularize}"
  key = "#{attrib_name}_id"
  class_eval <<-M1, __FILE__, __LINE__+1
    def #{assoc}(params={})
      return [] unless id
      reload = params.delete :reload
      cacheable = params.except(:credentials, :request).empty?
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      if cacheable
        # only cache unfiltered, default api call
        @attribs[:#{assoc}] = (!reload && @attribs[:#{assoc}]) || #{klass}.all(params)
      else
        #{klass}.all(params)
      end
    end
  M1
  class_eval <<-M2, __FILE__, __LINE__+1
    def find_#{assoc.singularize}(aid, params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.find(aid, params)
    end
  M2
  # will always return the object; check .errors? or .valid? to see how it went
  class_eval <<-M3, __FILE__, __LINE__+1
    def create_#{assoc.singularize}(params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.create(params)
    end
  M3
  # will always return the object; check .errors? or .valid? to see how it went
  class_eval <<-M4, __FILE__, __LINE__+1
    def update_#{assoc.singularize}(aid, params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.update(aid, params)
    end
  M4
  class_eval <<-M5, __FILE__, __LINE__+1
    def create_#{assoc.singularize}!(params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.create!(params)
    end
  M5
  class_eval <<-M6, __FILE__, __LINE__+1
    def update_#{assoc.singularize}!(aid, params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.update!(aid, params)
    end
  M6
  # will always return the object; check .errors? or .valid? to see how it went
  class_eval <<-M7, __FILE__, __LINE__+1
    def delete_#{assoc.singularize}(aid, params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.delete(aid, params)
    end
  M7
  class_eval <<-M8, __FILE__, __LINE__+1
    def delete_#{assoc.singularize}!(aid, params={})
      raise UnsavedObjectError unless id
      params = parse_request_params(params).reverse_merge credentials: api_creds
      params[:#{key}] = id
      #{klass}.delete!(aid, params)
    end
  M8
end