refactor "group by" to use embedded documents #168
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timgraham
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timgraham
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Oct 21, 2024
django_mongodb/compiler.py
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| # Unfold foreign fields. | ||
| if isinstance(expr, Col) and expr.alias != self.collection_name: | ||
| ids[self._unfold_column(expr)] = expr.as_mql(self, self.connection) | ||
| if expr.alias not in ids: |
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Use ids = defaultdict(dict) to avoid this?
timgraham
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Oct 21, 2024
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A new approach to compute group by using get project. This implementation simplifies group by, now it does not need GROUP_SEPARATOR and fold and unfold method.
Currently the foreign field are compute like:
'_id': {'T3___age': '$T3.age', 'age': '$age', 'name': '$name'}With this changes:
'_id': {'T3': {'age': '$T3.age'}, 'age': '$age', 'name': '$name'}