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262 lines
10 KiB
Python
262 lines
10 KiB
Python
from __future__ import unicode_literals
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from datetime import date
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from django.db.models.query_utils import InvalidQuery
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from django.test import TestCase, skipUnlessDBFeature
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from .models import Author, Book, Coffee, FriendlyAuthor, Reviewer
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class RawQueryTests(TestCase):
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fixtures = ['raw_query_books.json']
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def assertSuccessfulRawQuery(self, model, query, expected_results,
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expected_annotations=(), params=[], translations=None):
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"""
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Execute the passed query against the passed model and check the output
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"""
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results = list(model.objects.raw(query, params=params, translations=translations))
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self.assertProcessed(model, results, expected_results, expected_annotations)
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self.assertAnnotations(results, expected_annotations)
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def assertProcessed(self, model, results, orig, expected_annotations=()):
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"""
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Compare the results of a raw query against expected results
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"""
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self.assertEqual(len(results), len(orig))
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for index, item in enumerate(results):
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orig_item = orig[index]
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for annotation in expected_annotations:
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setattr(orig_item, *annotation)
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for field in model._meta.fields:
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# Check that all values on the model are equal
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self.assertEqual(
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getattr(item, field.attname),
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getattr(orig_item, field.attname)
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)
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# This includes checking that they are the same type
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self.assertEqual(
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type(getattr(item, field.attname)),
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type(getattr(orig_item, field.attname))
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)
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def assertNoAnnotations(self, results):
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"""
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Check that the results of a raw query contain no annotations
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"""
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self.assertAnnotations(results, ())
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def assertAnnotations(self, results, expected_annotations):
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"""
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Check that the passed raw query results contain the expected
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annotations
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"""
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if expected_annotations:
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for index, result in enumerate(results):
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annotation, value = expected_annotations[index]
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self.assertTrue(hasattr(result, annotation))
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self.assertEqual(getattr(result, annotation), value)
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def test_simple_raw_query(self):
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"""
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Basic test of raw query with a simple database query
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"""
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query = "SELECT * FROM raw_query_author"
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authors = Author.objects.all()
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self.assertSuccessfulRawQuery(Author, query, authors)
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def test_raw_query_lazy(self):
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"""
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Raw queries are lazy: they aren't actually executed until they're
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iterated over.
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"""
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q = Author.objects.raw('SELECT * FROM raw_query_author')
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self.assertIsNone(q.query.cursor)
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list(q)
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self.assertIsNotNone(q.query.cursor)
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def test_FK_raw_query(self):
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"""
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Test of a simple raw query against a model containing a foreign key
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"""
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query = "SELECT * FROM raw_query_book"
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books = Book.objects.all()
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self.assertSuccessfulRawQuery(Book, query, books)
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def test_db_column_handler(self):
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"""
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Test of a simple raw query against a model containing a field with
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db_column defined.
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"""
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query = "SELECT * FROM raw_query_coffee"
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coffees = Coffee.objects.all()
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self.assertSuccessfulRawQuery(Coffee, query, coffees)
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def test_order_handler(self):
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"""
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Test of raw raw query's tolerance for columns being returned in any
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order
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"""
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selects = (
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('dob, last_name, first_name, id'),
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('last_name, dob, first_name, id'),
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('first_name, last_name, dob, id'),
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)
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for select in selects:
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query = "SELECT %s FROM raw_query_author" % select
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authors = Author.objects.all()
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self.assertSuccessfulRawQuery(Author, query, authors)
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def test_translations(self):
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"""
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Test of raw query's optional ability to translate unexpected result
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column names to specific model fields
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"""
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query = "SELECT first_name AS first, last_name AS last, dob, id FROM raw_query_author"
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translations = {'first': 'first_name', 'last': 'last_name'}
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authors = Author.objects.all()
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self.assertSuccessfulRawQuery(Author, query, authors, translations=translations)
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def test_params(self):
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"""
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Test passing optional query parameters
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"""
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query = "SELECT * FROM raw_query_author WHERE first_name = %s"
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author = Author.objects.all()[2]
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params = [author.first_name]
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qset = Author.objects.raw(query, params=params)
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results = list(qset)
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self.assertProcessed(Author, results, [author])
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self.assertNoAnnotations(results)
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self.assertEqual(len(results), 1)
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self.assertIsInstance(repr(qset), str)
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@skipUnlessDBFeature('supports_paramstyle_pyformat')
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def test_pyformat_params(self):
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"""
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Test passing optional query parameters
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"""
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query = "SELECT * FROM raw_query_author WHERE first_name = %(first)s"
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author = Author.objects.all()[2]
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params = {'first': author.first_name}
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qset = Author.objects.raw(query, params=params)
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results = list(qset)
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self.assertProcessed(Author, results, [author])
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self.assertNoAnnotations(results)
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self.assertEqual(len(results), 1)
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self.assertIsInstance(repr(qset), str)
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def test_query_representation(self):
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"""
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Test representation of raw query with parameters
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"""
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query = "SELECT * FROM raw_query_author WHERE last_name = %(last)s"
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qset = Author.objects.raw(query, {'last': 'foo'})
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self.assertEqual(repr(qset), "<RawQuerySet: SELECT * FROM raw_query_author WHERE last_name = foo>")
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self.assertEqual(repr(qset.query), "<RawQuery: SELECT * FROM raw_query_author WHERE last_name = foo>")
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query = "SELECT * FROM raw_query_author WHERE last_name = %s"
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qset = Author.objects.raw(query, {'foo'})
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self.assertEqual(repr(qset), "<RawQuerySet: SELECT * FROM raw_query_author WHERE last_name = foo>")
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self.assertEqual(repr(qset.query), "<RawQuery: SELECT * FROM raw_query_author WHERE last_name = foo>")
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def test_many_to_many(self):
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"""
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Test of a simple raw query against a model containing a m2m field
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"""
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query = "SELECT * FROM raw_query_reviewer"
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reviewers = Reviewer.objects.all()
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self.assertSuccessfulRawQuery(Reviewer, query, reviewers)
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def test_extra_conversions(self):
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"""
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Test to insure that extra translations are ignored.
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"""
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query = "SELECT * FROM raw_query_author"
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translations = {'something': 'else'}
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authors = Author.objects.all()
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self.assertSuccessfulRawQuery(Author, query, authors, translations=translations)
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def test_missing_fields(self):
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query = "SELECT id, first_name, dob FROM raw_query_author"
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for author in Author.objects.raw(query):
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self.assertNotEqual(author.first_name, None)
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# last_name isn't given, but it will be retrieved on demand
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self.assertNotEqual(author.last_name, None)
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def test_missing_fields_without_PK(self):
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query = "SELECT first_name, dob FROM raw_query_author"
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try:
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list(Author.objects.raw(query))
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self.fail('Query without primary key should fail')
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except InvalidQuery:
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pass
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def test_annotations(self):
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query = "SELECT a.*, count(b.id) as book_count FROM raw_query_author a LEFT JOIN raw_query_book b ON a.id = b.author_id GROUP BY a.id, a.first_name, a.last_name, a.dob ORDER BY a.id"
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expected_annotations = (
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('book_count', 3),
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('book_count', 0),
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('book_count', 1),
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('book_count', 0),
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)
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authors = Author.objects.all()
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self.assertSuccessfulRawQuery(Author, query, authors, expected_annotations)
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def test_white_space_query(self):
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query = " SELECT * FROM raw_query_author"
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authors = Author.objects.all()
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self.assertSuccessfulRawQuery(Author, query, authors)
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def test_multiple_iterations(self):
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query = "SELECT * FROM raw_query_author"
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normal_authors = Author.objects.all()
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raw_authors = Author.objects.raw(query)
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# First Iteration
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first_iterations = 0
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for index, raw_author in enumerate(raw_authors):
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self.assertEqual(normal_authors[index], raw_author)
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first_iterations += 1
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# Second Iteration
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second_iterations = 0
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for index, raw_author in enumerate(raw_authors):
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self.assertEqual(normal_authors[index], raw_author)
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second_iterations += 1
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self.assertEqual(first_iterations, second_iterations)
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def test_get_item(self):
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# Indexing on RawQuerySets
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query = "SELECT * FROM raw_query_author ORDER BY id ASC"
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third_author = Author.objects.raw(query)[2]
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self.assertEqual(third_author.first_name, 'Bob')
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first_two = Author.objects.raw(query)[0:2]
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self.assertEqual(len(first_two), 2)
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self.assertRaises(TypeError, lambda: Author.objects.raw(query)['test'])
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def test_inheritance(self):
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# date is the end of the Cuban Missile Crisis, I have no idea when
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# Wesley was born
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f = FriendlyAuthor.objects.create(first_name="Wesley", last_name="Chun",
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dob=date(1962, 10, 28))
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query = "SELECT * FROM raw_query_friendlyauthor"
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self.assertEqual(
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[o.pk for o in FriendlyAuthor.objects.raw(query)], [f.pk]
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)
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def test_query_count(self):
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self.assertNumQueries(1, list, Author.objects.raw("SELECT * FROM raw_query_author"))
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def test_subquery_in_raw_sql(self):
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try:
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list(Book.objects.raw('SELECT id FROM (SELECT * FROM raw_query_book WHERE paperback IS NOT NULL) sq'))
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except InvalidQuery:
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self.fail("Using a subquery in a RawQuerySet raised InvalidQuery")
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