infi.clickhouse_orm/tests/test_materialized_fields.py

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import unittest
from datetime import date
from infi.clickhouse_orm.database import Database
from infi.clickhouse_orm.models import Model, NO_VALUE
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from infi.clickhouse_orm.fields import *
from infi.clickhouse_orm.engines import *
from infi.clickhouse_orm.funcs import F
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class MaterializedFieldsTest(unittest.TestCase):
def setUp(self):
self.database = Database('test-db', log_statements=True)
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self.database.create_table(ModelWithMaterializedFields)
def tearDown(self):
self.database.drop_database()
def test_insert_and_select(self):
instance = ModelWithMaterializedFields(
date_time_field='2016-08-30 11:00:00',
int_field=-10,
str_field='TEST'
)
self.database.insert([instance])
# We can't select * from table, as it doesn't select materialized and alias fields
query = 'SELECT date_time_field, int_field, str_field, mat_int, mat_date, mat_str, mat_func' \
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' FROM $db.%s ORDER BY mat_date' % ModelWithMaterializedFields.table_name()
for model_cls in (ModelWithMaterializedFields, None):
results = list(self.database.select(query, model_cls))
self.assertEqual(len(results), 1)
self.assertEqual(results[0].date_time_field, instance.date_time_field)
self.assertEqual(results[0].int_field, instance.int_field)
self.assertEqual(results[0].str_field, instance.str_field)
self.assertEqual(results[0].mat_int, abs(instance.int_field))
self.assertEqual(results[0].mat_str, instance.str_field.lower())
self.assertEqual(results[0].mat_date, instance.date_time_field.date())
self.assertEqual(results[0].mat_func, instance.str_field.lower())
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def test_assignment_error(self):
# I can't prevent assigning at all, in case db.select statements with model provided sets model fields.
instance = ModelWithMaterializedFields()
for value in ('x', [date.today()], ['aaa'], [None]):
with self.assertRaises(ValueError):
instance.mat_date = value
def test_wrong_field(self):
with self.assertRaises(AssertionError):
StringField(materialized=123)
def test_duplicate_default(self):
with self.assertRaises(AssertionError):
StringField(materialized='str_field', default='with default')
with self.assertRaises(AssertionError):
StringField(materialized='str_field', alias='str_field')
def test_default_value(self):
instance = ModelWithMaterializedFields()
self.assertEqual(instance.mat_str, NO_VALUE)
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class ModelWithMaterializedFields(Model):
int_field = Int32Field()
date_time_field = DateTimeField()
str_field = StringField()
mat_str = StringField(materialized='lower(str_field)')
mat_int = Int32Field(materialized='abs(int_field)')
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mat_date = DateField(materialized=u'toDate(date_time_field)')
mat_func = StringField(materialized=F.lower(str_field))
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engine = MergeTree('mat_date', ('mat_date',))