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import pytest
from .models import TestModel, TestM2MModel, TestModelWithCustomPK, TestM2MModelWithCustomPKOnM2M, \
TestModelWithoutM2MCheck, TestM2MModelWithoutM2MModeEnabled
@pytest.mark.django_db
def test_dirty_fields_on_m2m():
tm = TestM2MModel.objects.create()
tm2 = TestModel.objects.create()
tm.m2m_field.add(tm2)
assert tm._as_dict_m2m() == {'m2m_field': set([tm2.id])}
# m2m check should be explicit: you have to give the values you want to compare with db state.
# This first assertion means that m2m_field has one element of id tm2 in the database.
assert tm.get_dirty_fields(check_m2m={'m2m_field': set([tm2.id])}) == {}
# This second assertion means that I'm expecting a m2m_field that is related to an element with id 0
# As it differs, we return the previous saved elements.
assert tm.get_dirty_fields(check_m2m={'m2m_field': set([0])}) == {'m2m_field': set([tm2.id])}
assert tm.get_dirty_fields(check_m2m={'m2m_field': set([0, tm2.id])}) == {'m2m_field': set([tm2.id])}
@pytest.mark.django_db
def test_dirty_fields_on_m2m_not_possible_if_not_enabled():
tm = TestM2MModelWithoutM2MModeEnabled.objects.create()
tm2 = TestModel.objects.create()
tm.m2m_field.add(tm2)
with pytest.raises(ValueError):
assert tm.get_dirty_fields(check_m2m={'m2m_field': set([tm2.id])}) == {}
@pytest.mark.django_db
def test_m2m_check_with_custom_primary_key():
# test for bug: https://github.com/romgar/django-dirtyfields/issues/74
tm = TestModelWithCustomPK.objects.create(custom_primary_key='pk1')
m2m_model = TestM2MModelWithCustomPKOnM2M.objects.create()
# This line was triggering this error:
# AttributeError: 'TestModelWithCustomPK' object has no attribute 'id'
m2m_model.m2m_field.add(tm)
@pytest.mark.django_db
def test_m2m_disabled_does_not_allow_to_check_m2m_fields():
tm = TestModelWithoutM2MCheck.objects.create()
with pytest.raises(Exception):
assert tm.get_dirty_fields(check_m2m={'dummy': True})
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