Module: DataMapper::Constraints

Includes:
DeleteConstraint
Defined in:
lib/dm-constraints.rb,
lib/dm-constraints/migrations.rb,
lib/dm-constraints/delete_constraint.rb,
lib/dm-constraints/adapters/dm-do-adapter.rb,
lib/dm-constraints/adapters/dm-mysql-adapter.rb,
lib/dm-constraints/adapters/dm-oracle-adapter.rb,
lib/dm-constraints/adapters/dm-sqlite-adapter.rb,
lib/dm-constraints/adapters/dm-abstract-adapter.rb,
lib/dm-constraints/adapters/dm-postgres-adapter.rb,
lib/dm-constraints/adapters/dm-sqlserver-adapter.rb

Defined Under Namespace

Modules: Adapters, ClassMethods, DeleteConstraint, Migrations

Class Method Summary collapse

Methods included from DeleteConstraint

#add_constraint_option

Class Method Details

.include_constraint_api ⇒ Object 



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# File 'lib/dm-constraints.rb', line 40

def self.include_constraint_api
  DataMapper::Adapters::AbstractAdapter.descendants.each do |adapter_class|
    DataMapper::Adapters.include_constraint_api(DataMapper::Inflector.demodulize(adapter_class.name))
  end
end

.included(model) ⇒ Object

Add before hooks to #has to check for proper constraint definitions Add before hooks to #destroy to properly constrain children



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# File 'lib/dm-constraints.rb', line 29

def self.included(model)
  model.extend(ClassMethods)
  model.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    before_class_method :has, :check_delete_constraint_type

    if instance_methods.any? { |m| m.to_sym == :destroy }
      before :destroy, :check_delete_constraints
    end
  RUBY
end