Class: ROM::SQL::Associations::ManyToMany
- Inherits:
-
Associations::ManyToMany
- Object
- Associations::ManyToMany
- ROM::SQL::Associations::ManyToMany
- Defined in:
- lib/rom/sql/associations/many_to_many.rb
Direct Known Subclasses
Instance Method Summary collapse
- #call(target: self.target) ⇒ Object
- #join(type, source = self.source, target = self.target) ⇒ Object
- #join_keys ⇒ Object
- #persist(children, parents) ⇒ Object private
- #target_attr ⇒ Object
Methods included from SelfRef
Methods included from Core
Instance Method Details
#call(target: self.target) ⇒ Object
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# File 'lib/rom/sql/associations/many_to_many.rb', line 13 def call(target: self.target) left = join_assoc.(target: target) schema = if left.schema.key?(foreign_key) if target != self.target target.schema.merge(join_schema) else left.schema.project(*columns) end else target_schema end.qualified relation = left.join(source_table, join_keys) if view apply_view(schema, relation) else schema.(relation) end end |
#join(type, source = self.source, target = self.target) ⇒ Object
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# File 'lib/rom/sql/associations/many_to_many.rb', line 37 def join(type, source = self.source, target = self.target) through_assoc = source.associations[through] joined = through_assoc.join(type, source) joined.__send__(type, target.name.dataset, join_keys).qualified end |
#join_keys ⇒ Object
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# File 'lib/rom/sql/associations/many_to_many.rb', line 44 def join_keys { source_attr => target_attr } end |
#persist(children, parents) ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
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# File 'lib/rom/sql/associations/many_to_many.rb', line 54 def persist(children, parents) join_tuples = associate(children, parents) join_relation.multi_insert(join_tuples) end |
#target_attr ⇒ Object
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# File 'lib/rom/sql/associations/many_to_many.rb', line 49 def target_attr join_relation[target_key].qualified end |