1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
from __future__ import unicode_literals
from django.db import connection
from django.test import TestCase, skipUnlessDBFeature
from .models import Reporter, Article
class IntrospectionTests(TestCase):
def test_table_names(self):
tl = connection.introspection.table_names()
self.assertEqual(tl, sorted(tl))
self.assertTrue(Reporter._meta.db_table in tl,
"'%s' isn't in table_list()." % Reporter._meta.db_table)
self.assertTrue(Article._meta.db_table in tl,
"'%s' isn't in table_list()." % Article._meta.db_table)
def test_django_table_names(self):
with connection.cursor() as cursor:
cursor.execute('CREATE TABLE django_ixn_test_table (id INTEGER);')
tl = connection.introspection.django_table_names()
cursor.execute("DROP TABLE django_ixn_test_table;")
self.assertTrue('django_ixn_testcase_table' not in tl,
"django_table_names() returned a non-Django table")
def test_django_table_names_retval_type(self):
# Ticket #15216
with connection.cursor() as cursor:
cursor.execute('CREATE TABLE django_ixn_test_table (id INTEGER);')
tl = connection.introspection.django_table_names(only_existing=True)
self.assertIs(type(tl), list)
tl = connection.introspection.django_table_names(only_existing=False)
self.assertIs(type(tl), list)
def test_installed_models(self):
tables = [Article._meta.db_table, Reporter._meta.db_table]
models = connection.introspection.installed_models(tables)
self.assertEqual(models, set([Article, Reporter]))
def test_sequence_list(self):
sequences = connection.introspection.sequence_list()
expected = {'table': Reporter._meta.db_table, 'column': 'id'}
self.assertTrue(expected in sequences,
'Reporter sequence not found in sequence_list()')
def test_get_table_description_names(self):
with connection.cursor() as cursor:
desc = connection.introspection.get_table_description(cursor, Reporter._meta.db_table)
self.assertEqual([r[0] for r in desc],
[f.column for f in Reporter._meta.fields])
def test_get_table_description_types(self):
with connection.cursor() as cursor:
desc = connection.introspection.get_table_description(cursor, Reporter._meta.db_table)
self.assertEqual(
[datatype(r[1], r) for r in desc],
['AutoField' if connection.features.can_introspect_autofield else 'IntegerField',
'CharField', 'CharField', 'CharField',
'BigIntegerField' if connection.features.can_introspect_big_integer_field else 'IntegerField',
'BinaryField' if connection.features.can_introspect_binary_field else 'TextField']
)
# The following test fails on Oracle due to #17202 (can't correctly
# inspect the length of character columns).
@skipUnlessDBFeature('can_introspect_max_length')
def test_get_table_description_col_lengths(self):
with connection.cursor() as cursor:
desc = connection.introspection.get_table_description(cursor, Reporter._meta.db_table)
self.assertEqual(
[r[3] for r in desc if datatype(r[1], r) == 'CharField'],
[30, 30, 75]
)
@skipUnlessDBFeature('can_introspect_null')
def test_get_table_description_nullable(self):
with connection.cursor() as cursor:
desc = connection.introspection.get_table_description(cursor, Reporter._meta.db_table)
nullable_by_backend = connection.features.interprets_empty_strings_as_nulls
self.assertEqual(
[r[6] for r in desc],
[False, nullable_by_backend, nullable_by_backend, nullable_by_backend, True, True]
)
# Regression test for #9991 - 'real' types in postgres
@skipUnlessDBFeature('has_real_datatype')
def test_postgresql_real_type(self):
with connection.cursor() as cursor:
cursor.execute("CREATE TABLE django_ixn_real_test_table (number REAL);")
desc = connection.introspection.get_table_description(cursor, 'django_ixn_real_test_table')
cursor.execute('DROP TABLE django_ixn_real_test_table;')
self.assertEqual(datatype(desc[0][1], desc[0]), 'FloatField')
def test_get_relations(self):
with connection.cursor() as cursor:
relations = connection.introspection.get_relations(cursor, Article._meta.db_table)
# Older versions of MySQL don't have the chops to report on this stuff,
# so just skip it if no relations come back. If they do, though, we
# should test that the response is correct.
if relations:
# That's {field_index: (field_index_other_table, other_table)}
self.assertEqual(relations, {3: (0, Reporter._meta.db_table),
4: (0, Article._meta.db_table)})
@skipUnlessDBFeature('can_introspect_foreign_keys')
def test_get_key_columns(self):
with connection.cursor() as cursor:
key_columns = connection.introspection.get_key_columns(cursor, Article._meta.db_table)
self.assertEqual(
set(key_columns),
set([('reporter_id', Reporter._meta.db_table, 'id'),
('response_to_id', Article._meta.db_table, 'id')]))
def test_get_primary_key_column(self):
with connection.cursor() as cursor:
primary_key_column = connection.introspection.get_primary_key_column(cursor, Article._meta.db_table)
self.assertEqual(primary_key_column, 'id')
def test_get_indexes(self):
with connection.cursor() as cursor:
indexes = connection.introspection.get_indexes(cursor, Article._meta.db_table)
self.assertEqual(indexes['reporter_id'], {'unique': False, 'primary_key': False})
def test_get_indexes_multicol(self):
"""
Test that multicolumn indexes are not included in the introspection
results.
"""
with connection.cursor() as cursor:
indexes = connection.introspection.get_indexes(cursor, Reporter._meta.db_table)
self.assertNotIn('first_name', indexes)
self.assertIn('id', indexes)
def datatype(dbtype, description):
"""Helper to convert a data type into a string."""
dt = connection.introspection.get_field_type(dbtype, description)
if type(dt) is tuple:
return dt[0]
else:
return dt
|
