ForeignKeyIterator iterates from or to a table by its foreign key constraints. This is a special type of SchemaIterator with the same interface, so it can be used in place of a SchemaIterator, but internally it functions very differently. Whereas a SchemaIterator is a real iterator that only gets the next schema object when called, a ForeignKeyIterator slurps the given SchemaIterator so it can discover foreign key constraints.
| ForeignKeyIterator | ForeignKeyIterator iterates from or to a table by its foreign key constraints. |
| Functions | |
| new | |
| next_schema_object | Return the next schema object or undef when no more schema objects. |
| reset | |
| _get_fk_refs | |
| _recurse_fk_references | |
| _d |
sub new
| %args | Arguments |
| db | Database of tbl. |
| tbl | Table to iterate from to its referenced tables. |
| Schema | Schema object. |
| SchemaIterator | SchemaIterator object created with Schema and keep_ddl=>true. |
| TableParser | TableParser object. |
| Quoter | Quoter object. |
| reverse | Iterate in reverse, from referenced tables to tbl. |
ForeignKeyIterator object
sub next_schema_object
Return the next schema object or undef when no more schema objects.
Hashref of schema object with at least a db and tbl keys, like
{
db => 'test',
tbl => 'a',
ddl => 'CREATE TABLE `a` ( ...',
tbl_struct => <TableParser::parse()> hashref of parsed ddl,
fk_struct => <TableParser::get_fks()> hashref of parsed fk constraints
}
sub new
Return the next schema object or undef when no more schema objects.
sub next_schema_object
sub reset
sub _get_fk_refs
sub _recurse_fk_references
sub _d