Class: DataMapper::Associations::OneToMany::Proxy

Inherits:
Object
  • Object
show all
Includes:
DataMapper::Assertions
Defined in:
lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb

Overview

TODO: look at making this inherit from Collection. The API is almost identical, and it would make more sense for the relationship.get_children method to return a Proxy than a Collection that is wrapped in a Proxy.

Direct Known Subclasses

ManyToMany::Proxy

Instance Method Summary collapse

Methods included from DataMapper::Assertions

#assert_kind_of

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object (private) 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 308

def method_missing(method, *args, &block)
  results = children.__send__(method, *args, &block) if children.respond_to?(method)

  return self if LazyArray::RETURN_SELF.include?(method) && results.kind_of?(Array)

  results
end

Instance Method Details

#<<(resource) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 92

def <<(resource)
  assert_mutable
  return self if !resource.new_record? && self.include?(resource)
  super
  relate_resource(resource)
  self
end

#all(query = {}) ⇒ Object

FIXME: remove when RelationshipChain#get_children can return a Collection



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 78

def all(query = {})
  query.empty? ? self : @relationship.get_children(@parent, query)
end

#build(attributes = {}) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 152

def build(attributes = {})
  assert_mutable
  attributes = default_attributes.merge(attributes)
  resource = children.respond_to?(:build) ? super(attributes) : new_child(attributes)
  resource
end

#clear ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 145

def clear
  assert_mutable
  each { |resource| orphan_resource(resource) }
  super
  self
end

#create(attributes = {}) ⇒ Object

Raises:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 168

def create(attributes = {})
  assert_mutable
  raise UnsavedParentError, 'You cannot create until the parent is saved' if @parent.new_record?
  attributes = default_attributes.merge(attributes)
  resource = children.respond_to?(:create) ? super(attributes) : @relationship.child_model.create(attributes)
  self << resource
  resource
end

#delete(resource) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 135

def delete(resource)
  assert_mutable
  orphan_resource(super)
end

#delete_at(index) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 140

def delete_at(index)
  assert_mutable
  orphan_resource(super)
end

#destroy ⇒ Object

Raises:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 189

def destroy
  assert_mutable
  raise UnsavedParentError, 'You cannot mass-delete until the parent is saved' if @parent.new_record?
  super
end

#destroy! ⇒ Object

Raises:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 195

def destroy!
  assert_mutable
  raise UnsavedParentError, 'You cannot mass-delete without validations until the parent is saved' if @parent.new_record?
  super
end

#first(*args) ⇒ Object

FIXME: remove when RelationshipChain#get_children can return a Collection



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 83

def first(*args)
  if args.last.respond_to?(:merge)
    query = args.pop
    @relationship.get_children(@parent, query, :first, *args)
  else
    super
  end
end

#kind_of?(klass) ⇒ Boolean

Returns:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 231

def kind_of?(klass)
  super || children.kind_of?(klass)
end

#new(attributes = {}) ⇒ Object

Raises:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 159

def new(attributes = {})
  assert_mutable
  raise UnsavedParentError, 'You cannot intialize until the parent is saved' if @parent.new_record?
  attributes = default_attributes.merge(attributes)
  resource = children.respond_to?(:new) ? super(attributes) : @relationship.child_model.new(attributes)
  self << resource
  resource
end

#pop ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 125

def pop
  assert_mutable
  orphan_resource(super)
end

#push(*resources) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 100

def push(*resources)
  assert_mutable
  resources.reject { |resource| !resource.new_record? && self.include?(resource) }
  super
  resources.each { |resource| relate_resource(resource) }
  self
end

#reload ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 201

def reload
  @children = nil
  self
end

#replace(other) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 116

def replace(other)
  assert_mutable
  each { |resource| orphan_resource(resource) }
  other = other.map { |resource| resource.kind_of?(Hash) ? new_child(resource) : resource }
  super
  other.each { |resource| relate_resource(resource) }
  self
end

#respond_to?(method, include_private = false) ⇒ Boolean

Returns:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 235

def respond_to?(method, include_private = false)
  super || children.respond_to?(method, include_private)
end

#save ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 206

def save
  return true if children.frozen?

  # save every resource in the collection
  each { |resource| save_resource(resource) }

  # save orphan resources
  @orphans.each do |resource|
    begin
      save_resource(resource, nil)
    rescue
      children << resource unless children.frozen? || children.include?(resource)
      raise
    end
  end

  # FIXME: remove when RelationshipChain#get_children can return a Collection
  # place the children into a Collection if not already
  if children.kind_of?(Array) && !children.frozen?
    @children = @relationship.get_children(@parent).replace(children)
  end

  true
end

#shift ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 130

def shift
  assert_mutable
  orphan_resource(super)
end

#unshift(*resources) ⇒ Object 



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 108

def unshift(*resources)
  assert_mutable
  resources.reject { |resource| !resource.new_record? && self.include?(resource) }
  super
  resources.each { |resource| relate_resource(resource) }
  self
end

#update(attributes = {}) ⇒ Object

Raises:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 177

def update(attributes = {})
  assert_mutable
  raise UnsavedParentError, 'You cannot mass-update until the parent is saved' if @parent.new_record?
  super
end

#update!(attributes = {}) ⇒ Object

Raises:



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# File 'lib/gems/dm-core-0.9.7/lib/dm-core/associations/one_to_many.rb', line 183

def update!(attributes = {})
  assert_mutable
  raise UnsavedParentError, 'You cannot mass-update without validations until the parent is saved' if @parent.new_record?
  super
end