Multiple Unique Constraints with auto migrations #582
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northpowered
changed the title
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@northpowered Thanks for this, it looks promising! I think the linters are currently failing because of isort. |
Mb because we are using different linters |
piccolo/columns/constraints.py
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| ALTER TABLE foo_table ADD CONSTRAINT my_constraint_1 UNIQUE (foo_field, bar_field); | ||
| ALTER TABLE foo_table DROP IF EXIST CONSTRAINT my_constraint_1; | ||
| """ | ||
| def __init__(self, unique_columns: list[str]) -> None: |
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I think this is why the tests are failing.
We can't use this newer syntax yet, because we're keeping backwards compatibility with Python 3.7.
So it'll have to be typing.List[str] instead.
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Sorry, I used to Python3.10, so I forgot about older versions
piccolo/query/methods/alter.py
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| __slots__ = ("constraint_name","columns") | ||
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| constraint_name: str | ||
| columns: list[str] |
piccolo/query/methods/alter.py
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| @@ -433,6 +446,12 @@ def _get_constraint_name(self, column: t.Union[str, ForeignKey]) -> str: | |||
| tablename = self.table._meta.tablename | |||
| return f"{tablename}_{column_name}_fk" | |||
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| def add_unique_constraint(self, constraint_name: str, columns: list[str]): | |||
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@northpowered Sorry it has taken me so long - let's try and get these tests passing. |
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@dantownsend |
Full description is in pinned issue
ADDED:
IMPORTANT!
There`re no ALTER CONSTRAINT option, but will be added soon, I hope.
For changing constraint I recommend do it with 2 migrations: DROP->CREATE