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Code Issues 32 Releases Wiki Activity

Massive migration optimiser improvements + RenameModel opn

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This commit is contained in:
Andrew Godwin
2013-11-06 13:47:58 +00:00
parent 8265323c91
commit 106b019dc9
7 changed files with 520 additions and 19 deletions
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39
django/db/migrations/operations/fields.py
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@@ -8,7 +8,7 @@ class AddField(Operation):
"""
def __init__(self, model_name, name, field):
self.model_name = model_name.lower()
self.model_name = model_name
self.name = name
self.field = field
@@ -33,10 +33,16 @@ class AddField(Operation):
return (
(self.__class__ == other.__class__) and
(self.name == other.name) and
(self.model_name == other.model_name) and
(self.model_name.lower() == other.model_name.lower()) and
(self.field.deconstruct()[1:] == other.field.deconstruct()[1:])
)
def references_model(self, name, app_label=None):
return name.lower() == self.model_name.lower()
def references_field(self, model_name, name, app_label=None):
return self.references_model(model_name) and name.lower() == self.name.lower()
class RemoveField(Operation):
"""
@@ -44,7 +50,7 @@ class RemoveField(Operation):
"""
def __init__(self, model_name, name):
self.model_name = model_name.lower()
self.model_name = model_name
self.name = name
def state_forwards(self, app_label, state):
@@ -68,6 +74,12 @@ class RemoveField(Operation):
def describe(self):
return "Remove field %s from %s" % (self.name, self.model_name)
def references_model(self, name, app_label=None):
return name.lower() == self.model_name.lower()
def references_field(self, model_name, name, app_label=None):
return self.references_model(model_name) and name.lower() == self.name.lower()
class AlterField(Operation):
"""
@@ -75,7 +87,7 @@ class AlterField(Operation):
"""
def __init__(self, model_name, name, field):
self.model_name = model_name.lower()
self.model_name = model_name
self.name = name
self.field = field
@@ -104,10 +116,16 @@ class AlterField(Operation):
return (
(self.__class__ == other.__class__) and
(self.name == other.name) and
(self.model_name == other.model_name) and
(self.model_name.lower() == other.model_name.lower()) and
(self.field.deconstruct()[1:] == other.field.deconstruct()[1:])
)
def references_model(self, name, app_label=None):
return name.lower() == self.model_name.lower()
def references_field(self, model_name, name, app_label=None):
return self.references_model(model_name) and name.lower() == self.name.lower()
class RenameField(Operation):
"""
@@ -115,7 +133,7 @@ class RenameField(Operation):
"""
def __init__(self, model_name, old_name, new_name):
self.model_name = model_name.lower()
self.model_name = model_name
self.old_name = old_name
self.new_name = new_name
@@ -146,3 +164,12 @@ class RenameField(Operation):
def describe(self):
return "Rename field %s on %s to %s" % (self.old_name, self.model_name, self.new_name)
def references_model(self, name, app_label=None):
return name.lower() == self.model_name.lower()
def references_field(self, model_name, name, app_label=None):
return self.references_model(model_name) and (
name.lower() == self.old_name.lower() or
name.lower() == self.new_name.lower()
)