Applies model generics on relational fields functions

[ropmyung]

Description

Applied generic syntax on relational fields functions for type hinting

ForeignKeyField
OneToOneField

[codspeed-hq]

Merging this PR will not alter performance

✅ 24 untouched benchmarks

---

_{Comparing ropmyung:develop (99c0c19) with develop (f89618d)}

[waketzheng]

Why do that? What's the benefit?

[ropmyung]

Why do that? What's the benefit?

Of course for type hint. Otherwise, It shows like Model, not the specific model class

[waketzheng]

Could you show a demo of how 'Model' raises a type issue, while 'MODEL' does not?

[ropmyung]

Could you show a demo of how 'Model' raises a type issue, while 'MODEL' does not?

class Test1(Model):
    id = fields.BigIntField(pk=True)


class Test2(Model):
    id = fields.BigIntField(pk=True)
    test1 = fields.ForeignKeyField(Test1)

[waketzheng]

OK, get it. Seems that the ManyToManyField function in line 587 should be changed as well.

[waketzheng]

The following lines should be changed also:
361
384
424
438
450
460
525

[waketzheng]

@ropmyung, would you like to introduce generic syntax for ManyToManyField in this PR, or leave it for a separate one?

[ropmyung]

Oops, sorry I was too busy because of university stuff. I'll be happy if anyone addresses that; otherwise let me try implementing the ManyToMany generics within this week.

[waketzheng]

@ropmyung Please fix lint issue, it can be:

+++ b/tests/migrations/test_schema_editor_sql.py
@@ -89,7 +89,9 @@ async def test_add_field_m2m_generates_table_sql() -> None:

     class WidgetWithTags(Model):
         id = fields.IntField(pk=True)
-        tags = fields.ManyToManyField("models.Tag", related_name="widgets")
+        tags: fields.ManyToManyRelation[Tag] = fields.ManyToManyField(
+            "models.Tag", related_name="widgets"
+        )

         class Meta:
             table = "widget"
diff --git a/tests/testmodels.py b/tests/testmodels.py
index 24ca2fa9..62b3b23f 100644
--- a/tests/testmodels.py
+++ b/tests/testmodels.py
@@ -1152,7 +1152,9 @@ class Flavor(Model):
 class Drink(Model):
     id = fields.IntField(pk=True)
     name = fields.CharField(max_length=100)
-    flavors = fields.ManyToManyField("models.Flavor", related_name="drinks", through="drink_flavor")
-    toppings = fields.ManyToManyField(
+    flavors: fields.ManyToManyRelation[Flavor] = fields.ManyToManyField(
+        "models.Flavor", related_name="drinks", through="drink_flavor"
+    )
+    toppings: fields.ManyToManyRelation[Flavor] = fields.ManyToManyField(
         "models.Flavor", related_name="topping_drinks", through="drink_topping"
     )

[waketzheng]

If you are using Linux/MacOS, run the following command to auto fix style issue:

make lint

And for Windows, you can do it by:

uv sync --reinstall-package tortoise-orm --frozen --all-groups --extra asyncpg --extra accel --extra psycopg --extra asyncodbc --extra aiomysql
uv run --frozen ruff format tortoise/ examples/ tests/ conftest.py
uv run --frozen ruff check --fix tortoise/ examples/ tests/ conftest.py
uv run --frozen mypy tortoise/ examples/ tests/ conftest.py
uv run --frozen bandit -c pyproject.toml -r tortoise

[waketzheng]

@ropmyung You can run ruff format or uvx ruff format to auto-fix the lint issue.