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Cached ForeignObject.(local/foreign/reverse)_related_fields properties.

This commit is contained in:
Adam Johnson 2020-01-17 12:44:37 +00:00 committed by Mariusz Felisiak
parent e7d62e97eb
commit c1b24718e0
1 changed files with 5 additions and 7 deletions
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12
django/db/models/fields/related.py
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@ -616,21 +616,19 @@ class ForeignObject(RelatedField):
related_fields.append((from_field, to_field)) related_fields.append((from_field, to_field))
return related_fields return related_fields
@property @cached_property
def related_fields(self): def related_fields(self):
if not hasattr(self, '_related_fields'): return self.resolve_related_fields()
self._related_fields = self.resolve_related_fields()
return self._related_fields
@property @cached_property
def reverse_related_fields(self): def reverse_related_fields(self):
return [(rhs_field, lhs_field) for lhs_field, rhs_field in self.related_fields] return [(rhs_field, lhs_field) for lhs_field, rhs_field in self.related_fields]
@property @cached_property
def local_related_fields(self): def local_related_fields(self):
return tuple(lhs_field for lhs_field, rhs_field in self.related_fields) return tuple(lhs_field for lhs_field, rhs_field in self.related_fields)
@property @cached_property
def foreign_related_fields(self): def foreign_related_fields(self):
return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field) return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field)