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# -*- encoding: utf-8 -*-
from __future__ import unicode_literals
import re
from unittest import skipUnless
from django.core.management import call_command
from django.db import connection
from django.test import TestCase, skipUnlessDBFeature
from django.utils.six import PY3, StringIO
from .models import ColumnTypes
class InspectDBTestCase(TestCase):
def test_stealth_table_name_filter_option(self):
out = StringIO()
# Lets limit the introspection to tables created for models of this
# application
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_'),
stdout=out)
error_message = "inspectdb has examined a table that should have been filtered out."
# contrib.contenttypes is one of the apps always installed when running
# the Django test suite, check that one of its tables hasn't been
# inspected
self.assertNotIn("class DjangoContentType(models.Model):", out.getvalue(), msg=error_message)
def make_field_type_asserter(self):
"""Call inspectdb and return a function to validate a field type in its output"""
out = StringIO()
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_columntypes'),
stdout=out)
output = out.getvalue()
def assertFieldType(name, definition):
out_def = re.search(r'^\s*%s = (models.*)$' % name, output, re.MULTILINE).groups()[0]
self.assertEqual(definition, out_def)
return assertFieldType
def test_field_types(self):
"""Test introspection of various Django field types"""
assertFieldType = self.make_field_type_asserter()
# Inspecting Oracle DB doesn't produce correct results (#19884):
# - it gets max_length wrong: it returns a number of bytes.
# - it reports fields as blank=True when they aren't.
if (connection.features.can_introspect_max_length and
not connection.features.interprets_empty_strings_as_nulls):
assertFieldType('char_field', "models.CharField(max_length=10)")
assertFieldType('null_char_field', "models.CharField(max_length=10, blank=True, null=True)")
assertFieldType('comma_separated_int_field', "models.CharField(max_length=99)")
assertFieldType('date_field', "models.DateField()")
assertFieldType('date_time_field', "models.DateTimeField()")
if (connection.features.can_introspect_max_length and
not connection.features.interprets_empty_strings_as_nulls):
assertFieldType('email_field', "models.CharField(max_length=254)")
assertFieldType('file_field', "models.CharField(max_length=100)")
assertFieldType('file_path_field', "models.CharField(max_length=100)")
if connection.features.can_introspect_ip_address_field:
assertFieldType('ip_address_field', "models.GenericIPAddressField()")
assertFieldType('gen_ip_adress_field', "models.GenericIPAddressField()")
elif (connection.features.can_introspect_max_length and
not connection.features.interprets_empty_strings_as_nulls):
assertFieldType('ip_address_field', "models.CharField(max_length=15)")
assertFieldType('gen_ip_adress_field', "models.CharField(max_length=39)")
if (connection.features.can_introspect_max_length and
not connection.features.interprets_empty_strings_as_nulls):
assertFieldType('slug_field', "models.CharField(max_length=50)")
if not connection.features.interprets_empty_strings_as_nulls:
assertFieldType('text_field', "models.TextField()")
if connection.features.can_introspect_time_field:
assertFieldType('time_field', "models.TimeField()")
if (connection.features.can_introspect_max_length and
not connection.features.interprets_empty_strings_as_nulls):
assertFieldType('url_field', "models.CharField(max_length=200)")
def test_number_field_types(self):
"""Test introspection of various Django field types"""
assertFieldType = self.make_field_type_asserter()
if not connection.features.can_introspect_autofield:
assertFieldType('id', "models.IntegerField(primary_key=True) # AutoField?")
if connection.features.can_introspect_big_integer_field:
assertFieldType('big_int_field', "models.BigIntegerField()")
else:
assertFieldType('big_int_field', "models.IntegerField()")
bool_field = ColumnTypes._meta.get_field('bool_field')
bool_field_type = connection.features.introspected_boolean_field_type(bool_field)
assertFieldType('bool_field', "models.{}()".format(bool_field_type))
null_bool_field = ColumnTypes._meta.get_field('null_bool_field')
null_bool_field_type = connection.features.introspected_boolean_field_type(null_bool_field)
if 'BooleanField' in null_bool_field_type:
assertFieldType('null_bool_field', "models.{}()".format(null_bool_field_type))
else:
if connection.features.can_introspect_null:
assertFieldType('null_bool_field', "models.{}(blank=True, null=True)".format(null_bool_field_type))
else:
assertFieldType('null_bool_field', "models.{}()".format(null_bool_field_type))
if connection.features.can_introspect_decimal_field:
assertFieldType('decimal_field', "models.DecimalField(max_digits=6, decimal_places=1)")
else: # Guessed arguments on SQLite, see #5014
assertFieldType('decimal_field', "models.DecimalField(max_digits=10, decimal_places=5) "
"# max_digits and decimal_places have been guessed, "
"as this database handles decimal fields as float")
assertFieldType('float_field', "models.FloatField()")
assertFieldType('int_field', "models.IntegerField()")
if connection.features.can_introspect_positive_integer_field:
assertFieldType('pos_int_field', "models.PositiveIntegerField()")
else:
assertFieldType('pos_int_field', "models.IntegerField()")
if connection.features.can_introspect_positive_integer_field:
if connection.features.can_introspect_small_integer_field:
assertFieldType('pos_small_int_field', "models.PositiveSmallIntegerField()")
else:
assertFieldType('pos_small_int_field', "models.PositiveIntegerField()")
else:
if connection.features.can_introspect_small_integer_field:
assertFieldType('pos_small_int_field', "models.SmallIntegerField()")
else:
assertFieldType('pos_small_int_field', "models.IntegerField()")
if connection.features.can_introspect_small_integer_field:
assertFieldType('small_int_field', "models.SmallIntegerField()")
else:
assertFieldType('small_int_field', "models.IntegerField()")
@skipUnlessDBFeature('can_introspect_foreign_keys')
def test_attribute_name_not_python_keyword(self):
out = StringIO()
# Lets limit the introspection to tables created for models of this
# application
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_'),
stdout=out)
output = out.getvalue()
error_message = "inspectdb generated an attribute name which is a python keyword"
# Recursive foreign keys should be set to 'self'
self.assertIn("parent = models.ForeignKey('self')", output)
self.assertNotIn("from = models.ForeignKey(InspectdbPeople)", output, msg=error_message)
# As InspectdbPeople model is defined after InspectdbMessage, it should be quoted
self.assertIn("from_field = models.ForeignKey('InspectdbPeople', db_column='from_id')",
output)
self.assertIn("people_pk = models.ForeignKey(InspectdbPeople, primary_key=True)",
output)
self.assertIn("people_unique = models.ForeignKey(InspectdbPeople, unique=True)",
output)
def test_digits_column_name_introspection(self):
"""Introspection of column names consist/start with digits (#16536/#17676)"""
out = StringIO()
# Lets limit the introspection to tables created for models of this
# application
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_'),
stdout=out)
output = out.getvalue()
error_message = "inspectdb generated a model field name which is a number"
self.assertNotIn(" 123 = models.CharField", output, msg=error_message)
self.assertIn("number_123 = models.CharField", output)
error_message = "inspectdb generated a model field name which starts with a digit"
self.assertNotIn(" 4extra = models.CharField", output, msg=error_message)
self.assertIn("number_4extra = models.CharField", output)
self.assertNotIn(" 45extra = models.CharField", output, msg=error_message)
self.assertIn("number_45extra = models.CharField", output)
def test_special_column_name_introspection(self):
"""
Introspection of column names containing special characters,
unsuitable for Python identifiers
"""
out = StringIO()
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_'),
stdout=out)
output = out.getvalue()
base_name = 'Field' if not connection.features.uppercases_column_names else 'field'
self.assertIn("field = models.IntegerField()", output)
self.assertIn("field_field = models.IntegerField(db_column='%s_')" % base_name, output)
self.assertIn("field_field_0 = models.IntegerField(db_column='%s__')" % base_name, output)
self.assertIn("field_field_1 = models.IntegerField(db_column='__field')", output)
self.assertIn("prc_x = models.IntegerField(db_column='prc(%) x')", output)
if PY3:
# Python 3 allows non-ASCII identifiers
self.assertIn("tamaño = models.IntegerField()", output)
else:
self.assertIn("tama_o = models.IntegerField(db_column='tama\\xf1o')", output)
def test_table_name_introspection(self):
"""
Introspection of table names containing special characters,
unsuitable for Python identifiers
"""
out = StringIO()
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_'),
stdout=out)
output = out.getvalue()
self.assertIn("class InspectdbSpecialTableName(models.Model):", output)
def test_managed_models(self):
"""Test that by default the command generates models with `Meta.managed = False` (#14305)"""
out = StringIO()
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_columntypes'),
stdout=out)
output = out.getvalue()
self.longMessage = False
self.assertIn(" managed = False", output, msg='inspectdb should generate unmanaged models.')
def test_unique_together_meta(self):
out = StringIO()
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_uniquetogether'),
stdout=out)
output = out.getvalue()
unique_re = re.compile(r'.*unique_together = \((.+),\).*')
unique_together_match = re.findall(unique_re, output)
# There should be one unique_together tuple.
self.assertEqual(len(unique_together_match), 1)
fields = unique_together_match[0]
# Fields with db_column = field name.
self.assertIn("('field1', 'field2')", fields)
# Fields from columns whose names are Python keywords.
self.assertIn("('field1', 'field2')", fields)
# Fields whose names normalize to the same Python field name and hence
# are given an integer suffix.
self.assertIn("('non_unique_column', 'non_unique_column_0')", fields)
@skipUnless(connection.vendor == 'sqlite',
"Only patched sqlite's DatabaseIntrospection.data_types_reverse for this test")
def test_custom_fields(self):
"""
Introspection of columns with a custom field (#21090)
"""
out = StringIO()
orig_data_types_reverse = connection.introspection.data_types_reverse
try:
connection.introspection.data_types_reverse = {
'text': 'myfields.TextField',
'bigint': 'BigIntegerField',
}
call_command('inspectdb',
table_name_filter=lambda tn: tn.startswith('inspectdb_columntypes'),
stdout=out)
output = out.getvalue()
self.assertIn("text_field = myfields.TextField()", output)
self.assertIn("big_int_field = models.BigIntegerField()", output)
finally:
connection.introspection.data_types_reverse = orig_data_types_reverse
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