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Added full caching to all attributes on a per-object level. This speeds up attribute loading considerably.

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This commit is contained in:
Griatch 2012-04-26 21:39:16 +02:00
parent 9f9dadd4eb
commit 9d970ea7c5
1 changed files with 54 additions and 26 deletions
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80
src/typeclasses/models.py
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@ -1213,14 +1213,21 @@ class TypedObject(SharedMemoryModel):
# Helper methods for persistent attributes
_attribute_cache = {}
def has_attribute(self, attribute_name):
"""
See if we have an attribute set on the object.
attribute_name: (str) The attribute's name.
"""
return _GA(self, "_attribute_class").objects.filter(db_obj=self).filter(
db_key__iexact=attribute_name).count()
if attribute_name not in _GA(self, "_attribute_cache"):
attrib_obj = _GA(self, "_attribute_class").objects.filter(db_obj=self).filter(
db_key__iexact=attribute_name)
if attrib_obj:
_GA(self, "_attribute_cache")[attribute_name] = attrib_obj[0]
else:
return False
return True
def set_attribute(self, attribute_name, new_value=None):
"""
@ -1231,17 +1238,21 @@ class TypedObject(SharedMemoryModel):
new_value: (python obj) The value to set the attribute to. If this is not
a str, the object will be stored as a pickle.
"""
attrib_obj = None
attrclass = _GA(self, "_attribute_class")
try:
# use old attribute
attrib_obj = _GA(self, "_attribute_cache").get("attribute_name")
if not attrib_obj:
attrclass = _GA(self, "_attribute_class")
# check if attribute already exists.
attrib_obj = attrclass.objects.filter(
db_obj=self).filter(db_key__iexact=attribute_name)[0]
except IndexError:
db_obj=self).filter(db_key__iexact=attribute_name)
if attrib_obj:
# use old attribute
attrib_obj = attrib_obj[0]
else:
# no match; create new attribute
attrib_obj = attrclass(db_key=attribute_name, db_obj=self)
# re-set an old attribute value
attrib_obj.value = new_value
_GA(self,"_attribute_cache")[attribute_name] = attrib_obj
def get_attribute(self, attribute_name, default=None):
"""
@ -1252,12 +1263,14 @@ class TypedObject(SharedMemoryModel):
attribute_name: (str) The attribute's name.
default: What to return if no attribute is found
"""
attrib_obj = default
try:
attrib_obj = _GA(self,"_attribute_cache").get(attribute_name)
if not attrib_obj:
attrib_obj = _GA(self, "_attribute_class").objects.filter(
db_obj=self).filter(db_key__iexact=attribute_name)[0]
except IndexError:
return default
db_obj=self).filter(db_key__iexact=attribute_name)
if not attrib_obj:
return default
_GA(self,"_attribute_cache")[attribute_name] = attrib_obj[0] #query is first evaluated here
return _GA(self, "_attribute_cache")[attribute_name].value
return attrib_obj.value
def get_attribute_raise(self, attribute_name):
@ -1267,11 +1280,15 @@ class TypedObject(SharedMemoryModel):
attribute_name: (str) The attribute's name.
"""
try:
return _GA(self, "_attribute_class").objects.filter(
db_obj=self).filter(db_key__iexact=attribute_name)[0].value
except IndexError:
raise AttributeError
attrib_obj = _GA(self, "_attribute_cache.get")(attribute_name)
if not attrib_obj:
attrib_obj = _GA(self, "_attribute_class").objects.filter(
db_obj=self).filter(db_key__iexact=attribute_name)
if not attrib_obj:
raise AttributeError
_GA(self, "_attribute_cache")[attribute_name] = attrib_obj[0] #query is first evaluated here
return _GA(self, "_attribute_cache")[attribute_name].value
return attrib_obj.value
def del_attribute(self, attribute_name):
"""
@ -1279,11 +1296,16 @@ class TypedObject(SharedMemoryModel):
attribute_name: (str) The attribute's name.
"""
try:
_GA(self, "_attribute_class").objects.filter(
attr_obj = _GA(self, "_attribute_cache").get(attribute_name)
if attr_obj:
del _GA(self, "_attribute_cache")[attribute_name]
attr_obj.delete()
else:
try:
_GA(self, "_attribute_class").objects.filter(
db_obj=self).filter(db_key__iexact=attribute_name)[0].delete()
except IndexError:
pass
except IndexError:
pass
def del_attribute_raise(self, attribute_name):
"""
@ -1292,11 +1314,17 @@ class TypedObject(SharedMemoryModel):
attribute_name: (str) The attribute's name.
"""
try:
_GA(self, "_attribute_class").objects.filter(
attr_obj = _GA(self, "_attribute_cache").get(attribute_name)
if attr_obj:
del _GA(self, "_attribute_cache")[attribute_name]
attr_obj.delete()
else:
try:
_GA(self, "_attribute_class").objects.filter(
db_obj=self).filter(db_key__iexact=attribute_name)[0].delete()
except IndexError:
raise AttributeError
except IndexError:
pass
raise AttributeError
def get_all_attributes(self):
"""