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Refs #26709 -- Added IndexOperation to avoid code duplication.

This commit is contained in:
Akshesh 2016-07-07 11:49:25 +05:30 committed by Tim Graham
parent b1e7d19d4c
commit f7e907115f
1 changed files with 17 additions and 9 deletions
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26
django/db/migrations/operations/models.py
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@ -744,7 +744,15 @@ class AlterModelManagers(ModelOptionOperation):
return "Change managers on %s" % (self.name, )
class AddIndex(Operation):
class IndexOperation(Operation):
option_name = 'indexes'
@cached_property
def model_name_lower(self):
return self.model_name.lower()
class AddIndex(IndexOperation):
"""
Add an index on a model.
"""
@ -759,9 +767,9 @@ class AddIndex(Operation):
self.index = index
def state_forwards(self, app_label, state):
model_state = state.models[app_label, self.model_name.lower()]
model_state = state.models[app_label, self.model_name_lower]
self.index.model = state.apps.get_model(app_label, self.model_name)
model_state.options['indexes'].append(self.index)
model_state.options[self.option_name].append(self.index)
def database_forwards(self, app_label, schema_editor, from_state, to_state):
schema_editor.add_index(self.index)
@ -787,7 +795,7 @@ class AddIndex(Operation):
)
class RemoveIndex(Operation):
class RemoveIndex(IndexOperation):
"""
Remove an index from a model.
"""
@ -797,17 +805,17 @@ class RemoveIndex(Operation):
self.name = name
def state_forwards(self, app_label, state):
model_state = state.models[app_label, self.model_name.lower()]
indexes = model_state.options['indexes']
model_state.options['indexes'] = [idx for idx in indexes if idx.name != self.name]
model_state = state.models[app_label, self.model_name_lower]
indexes = model_state.options[self.option_name]
model_state.options[self.option_name] = [idx for idx in indexes if idx.name != self.name]
def database_forwards(self, app_label, schema_editor, from_state, to_state):
from_model_state = from_state.models[app_label, self.model_name.lower()]
from_model_state = from_state.models[app_label, self.model_name_lower]
index = from_model_state.get_index_by_name(self.name)
schema_editor.remove_index(index)
def database_backwards(self, app_label, schema_editor, from_state, to_state):
to_model_state = to_state.models[app_label, self.model_name.lower()]
to_model_state = to_state.models[app_label, self.model_name_lower]
index = to_model_state.get_index_by_name(self.name)
schema_editor.add_index(index)