author | Lennard de Rijk <ljvderijk@gmail.com> |
Sat, 29 Nov 2008 14:41:43 +0000 | |
changeset 609 | 45bc26f48090 |
parent 54 | 03e267d67478 |
permissions | -rw-r--r-- |
54
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
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""" |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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Make sure that the content type cache (see ContentTypeManager) works correctly. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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Lookups for a particular content type -- by model or by ID -- should hit the |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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database only on the first lookup. |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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|
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Major reorganization of the soc svn repo, to merge into a single App Engine
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First, let's make sure we're dealing with a blank slate (and that DEBUG is on so |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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that queries get logged):: |
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|
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Major reorganization of the soc svn repo, to merge into a single App Engine
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>>> from django.conf import settings |
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>>> settings.DEBUG = True |
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|
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>>> from django.contrib.contenttypes.models import ContentType |
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>>> ContentType.objects.clear_cache() |
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|
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>>> from django import db |
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>>> db.reset_queries() |
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At this point, a lookup for a ContentType should hit the DB:: |
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>>> ContentType.objects.get_for_model(ContentType) |
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<ContentType: content type> |
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|
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>>> len(db.connection.queries) |
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1 |
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A second hit, though, won't hit the DB, nor will a lookup by ID:: |
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|
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>>> ct = ContentType.objects.get_for_model(ContentType) |
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>>> len(db.connection.queries) |
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1 |
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>>> ContentType.objects.get_for_id(ct.id) |
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<ContentType: content type> |
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>>> len(db.connection.queries) |
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1 |
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Major reorganization of the soc svn repo, to merge into a single App Engine
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Once we clear the cache, another lookup will again hit the DB:: |
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03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
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>>> ContentType.objects.clear_cache() |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
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>>> ContentType.objects.get_for_model(ContentType) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
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<ContentType: content type> |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
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>>> len(db.connection.queries) |
03e267d67478
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2 |
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03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
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Don't forget to reset DEBUG! |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
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Major reorganization of the soc svn repo, to merge into a single App Engine
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>>> settings.DEBUG = False |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
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""" |