61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
"""
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Tests for forcing insert and update queries (instead of Django's normal
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automatic behaviour).
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"""
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from django.db import models, transaction
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class Counter(models.Model):
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name = models.CharField(max_length = 10)
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value = models.IntegerField()
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class WithCustomPK(models.Model):
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name = models.IntegerField(primary_key=True)
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value = models.IntegerField()
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__test__ = {"API_TESTS": """
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>>> c = Counter.objects.create(name="one", value=1)
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# The normal case
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>>> c.value = 2
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>>> c.save()
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# Same thing, via an update
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>>> c.value = 3
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>>> c.save(force_update=True)
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# Won't work because force_update and force_insert are mutually exclusive
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>>> c.value = 4
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>>> c.save(force_insert=True, force_update=True)
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Traceback (most recent call last):
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...
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ValueError: Cannot force both insert and updating in model saving.
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# Try to update something that doesn't have a primary key in the first place.
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>>> c1 = Counter(name="two", value=2)
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>>> c1.save(force_update=True)
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Traceback (most recent call last):
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...
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ValueError: Cannot force an update in save() with no primary key.
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>>> c1.save(force_insert=True)
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# Won't work because we can't insert a pk of the same value.
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>>> sid = transaction.savepoint()
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>>> c.value = 5
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>>> c.save(force_insert=True)
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Traceback (most recent call last):
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...
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IntegrityError: ...
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>>> transaction.savepoint_rollback(sid)
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# Trying to update should still fail, even with manual primary keys, if the
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# data isn't in the database already.
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>>> obj = WithCustomPK(name=1, value=1)
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>>> obj.save(force_update=True)
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Traceback (most recent call last):
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...
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DatabaseError: ...
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"""
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}
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