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Add "one_to_many", "one_to_one", "many_to_many," and "many_to_one" attributes to Field base class (#449)

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* Add "_to_many" and "_to_one" bool attributes to Field base class.

* Remove unused import from test case.
This commit is contained in:
James Perretta
2020-08-24 16:09:15 -04:00
committed by GitHub
parent 6ef2cf0331
commit 95252cde60
2 changed files with 30 additions and 0 deletions
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26
test-data/typecheck/db/models/test_init.yml Normal file
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@@ -0,0 +1,26 @@
- case: field_to_many_and_to_one_attrs_bool_or_none_in_field_base_class
main: |
from django.db.models import Field
field: Field
my_bool: bool
my_bool = field.one_to_many
my_bool = field.one_to_one
my_bool = field.many_to_many
my_bool = field.many_to_one
# Narrowing the types should give us bool
assert field.one_to_many is not None
my_bool = field.one_to_many
assert field.one_to_one is not None
my_bool = field.one_to_one
assert field.many_to_many is not None
my_bool = field.many_to_many
assert field.many_to_one is not None
my_bool = field.many_to_one
out: |
main:6: error: Incompatible types in assignment (expression has type "Optional[bool]", variable has type "bool")
main:7: error: Incompatible types in assignment (expression has type "Optional[bool]", variable has type "bool")
main:8: error: Incompatible types in assignment (expression has type "Optional[bool]", variable has type "bool")
main:9: error: Incompatible types in assignment (expression has type "Optional[bool]", variable has type "bool")