Module: DeclareSchema::Model::ClassMethods

Defined in:
lib/declare_schema/model.rb

Instance Method Summary collapse

Instance Method Details

#attr_type(name) ⇒ Object

Returns the type (a class) for a given field or association. If the association is a collection (has_many or habtm) return the AssociationReflection instead



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# File 'lib/declare_schema/model.rb', line 214

public \
def attr_type(name)
  if attr_types.nil? && self != self.name.constantize
    raise "attr_types called on a stale class object (#{self.name}). Avoid storing persistent references to classes"
  end

  attr_types[name] ||
    if (refl = reflections[name.to_s])
      if refl.macro.in?([:has_one, :belongs_to]) && !refl.options[:polymorphic]
        refl.klass
      else
        refl
      end
    end ||
    if (col = column(name.to_s))
      DeclareSchema::PLAIN_TYPES[col.type] || col.klass
    end
end

#constraint(fkey, options = {}) ⇒ Object 



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# File 'lib/declare_schema/model.rb', line 63

def constraint(fkey, options = {})
  fkey_s = fkey.to_s
  unless constraint_specs.any? { |constraint_spec| constraint_spec.foreign_key == fkey_s }
    constraint_specs << DeclareSchema::Model::ForeignKeySpec.new(self, fkey, options)
  end
end

#declare_field(name, type, *args) ⇒ Object

Declare named field with a type and an arbitrary set of arguments. The arguments are forwarded to the #field_added callback, allowing custom metadata to be added to field declarations.



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# File 'lib/declare_schema/model.rb', line 80

def declare_field(name, type, *args)
  options = args.extract_options!
  field_added(name, type, args, options) if respond_to?(:field_added)
  add_formatting_for_field(name, type, args)
  add_validations_for_field(name, type, args, options)
  add_index_for_field(name, args, options)
  field_specs[name] = ::DeclareSchema::Model::FieldSpec.new(self, name, type, options)
  attr_order << name unless name.in?(attr_order)
end

#ignore_index(index_name) ⇒ Object

tell the migration generator to ignore the named index. Useful for existing indexes, or for indexes that can't be automatically generated (for example: an prefix index in MySQL)



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# File 'lib/declare_schema/model.rb', line 72

def ignore_index(index_name)
  ignore_indexes << index_name.to_s
end

#index(fields, options = {}) ⇒ Object 



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# File 'lib/declare_schema/model.rb', line 51

def index(fields, options = {})
  # don't double-index fields
  index_fields_s = Array.wrap(fields).map(&:to_s)
  unless index_specs.any? { |index_spec| index_spec.fields == index_fields_s }
    index_specs << ::DeclareSchema::Model::IndexSpec.new(self, fields, options)
  end
end

#index_specs_with_primary_key ⇒ Object 



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# File 'lib/declare_schema/model.rb', line 90

def index_specs_with_primary_key
  if index_specs.any?(&:primary_key?)
    index_specs
  else
    index_specs + [rails_default_primary_key]
  end
end

#primary_key ⇒ Object 



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# File 'lib/declare_schema/model.rb', line 98

def primary_key
  super || 'id'
end

#primary_key_index(*fields) ⇒ Object 



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# File 'lib/declare_schema/model.rb', line 59

def primary_key_index(*fields)
  index(fields.flatten, unique: true, name: "PRIMARY_KEY")
end