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POCorrect way to unit test Django models without transaction errors
 

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  1. POCorrect way to unit test Django models without transaction errors
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    <p>I'm writing some models with constraints like <code>unique=True</code> and <code>blank=False</code> and <code>null=False</code>. I'm trying to write tests for the models with nose. However, if I write a test like this:</p> <pre><code>from job_sites.models import Site, SiteType @raises(IntegrityError) def test_empty_site(): s = Site() s.save() @raises(IntegrityError) def test_empty_site_type(): st = SiteType() st.save() </code></pre> <p>I get a DatabaseError like this: <code>DatabaseError: current transaction is aborted, commands ignored until end of transaction block</code> after it runs the first test.</p> <p>What is the correct way to run DJango model tests when I'm expecting errors?</p> <p>For reference, the models look like this:</p> <pre><code>class SiteType(models.Model): site_type_id = models.AutoField(primary_key=True) site_type = models.CharField(max_length=32, unique=True, blank=False, null=False, default=None) site_type_abbrev = models.CharField(max_length=32, blank=True) class Meta: db_table = u'site_types' class Site(models.Model): site_id = models.AutoField(primary_key=True, blank=False, null=False, db_index=True) site_name = models.CharField(max_length=128, blank=False, null=False, db_index=True) site_type = models.ForeignKey(SiteType, blank=True, null=True) date_entered = models.DateTimeField(auto_now_add=True) class Meta: db_table = u'sites' </code></pre> <p>My constraints and defaults look like this:</p> <pre><code>ALTER TABLE site_types ADD CONSTRAINT site_types_site_type_name_minlen CHECK (char_length(site_type) &gt; 0); ALTER TABLE sites ALTER COLUMN date_entered SET DEFAULT now(); ALTER TABLE sites ADD CONSTRAINT sites_site_name_minlen CHECK (char_length(site_name) &gt; 0); </code></pre>
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