Module: ExposeDB::Relations
- Included in:
- Model
- Defined in:
- lib/expose_db/model/relations.rb
Instance Method Summary collapse
- #belongs_to(name, options = {}) ⇒ Object
-
#constantize_class_from_name(camel_cased_word) ⇒ Object
Selected from ActiveSupport.
- #has_many(plural_name, options = {}) ⇒ Object
- #resolve_relation_class(class_name) ⇒ Object
- #resolved_relation_classes ⇒ Object
Instance Method Details
#belongs_to(name, options = {}) ⇒ Object
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# File 'lib/expose_db/model/relations.rb', line 3 def belongs_to(name, = {}) if .key?(:class_name) class_name = .fetch(:class_name).to_s else class_name = name.to_s.titleize end foreign_key = ([:foreign_key] || "#{name.to_s.underscore}_id").to_sym define_method(name) do found = instance_variable_get(:"@#{name}") return found if found if id = send(foreign_key) found = self.class.resolve_relation_class(class_name).find(id) instance_variable_set(:"@#{name}", found) end found end end |
#constantize_class_from_name(camel_cased_word) ⇒ Object
Selected from ActiveSupport
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# File 'lib/expose_db/model/relations.rb', line 59 def constantize_class_from_name(camel_cased_word) names = camel_cased_word.split('::') names.shift if names.empty? || names.first.empty? constant = Object names.each do |name| constant = constant.const_defined?(name) ? constant.const_get(name) : constant.const_missing(name) end constant end |
#has_many(plural_name, options = {}) ⇒ Object
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# File 'lib/expose_db/model/relations.rb', line 25 def has_many(plural_name, = {}) singular_name = plural_name.to_s.sub(/s\Z/, '') if .key?(:class_name) class_name = .fetch(:class_name).to_s else class_name = singular_name.titleize end primary_key = ([:primary_key] || :id).to_sym foreign_key = ([:foreign_key] || "#{singular_name.underscore}_id").to_sym define_method(plural_name) do found = instance_variable_get(:"@#{plural_name}") return found if found relation_class = self.class.resolve_relation_class(class_name) found = relation_class.filter("#{foreign_key} = ?", send(primary_key)) instance_variable_set(:"@#{plural_name}", found) found end end |
#resolve_relation_class(class_name) ⇒ Object
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# File 'lib/expose_db/model/relations.rb', line 50 def resolve_relation_class(class_name) resolved_relation_classes[class_name] ||= constantize_class_from_name(class_name) end |
#resolved_relation_classes ⇒ Object
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# File 'lib/expose_db/model/relations.rb', line 54 def resolved_relation_classes @resolved_relation_classes ||= {} end |