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Make sqlmigrate ignore the RunPython operation

This commit is contained in:
Andrew Godwin 2013-09-25 14:37:44 +01:00
parent 3b810c5656
commit 8a3e543f26
3 changed files with 25 additions and 5 deletions
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4
django/db/migrations/executor.py
View File

@ -71,9 +71,9 @@ class MigrationExecutor(object):
with self.connection.schema_editor(collect_sql=True) as schema_editor:
project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
if not backwards:
migration.apply(project_state, schema_editor)
migration.apply(project_state, schema_editor, collect_sql=True)
else:
migration.unapply(project_state, schema_editor)
migration.unapply(project_state, schema_editor, collect_sql=True)
statements.extend(schema_editor.collected_sql)
return statements

23
django/db/migrations/migration.py
View File

@ -67,7 +67,7 @@ class Migration(object):
operation.state_forwards(self.app_label, new_state)
return new_state
def apply(self, project_state, schema_editor):
def apply(self, project_state, schema_editor, collect_sql=False):
"""
Takes a project_state representing all migrations prior to this one
and a schema_editor for a live database and applies the migration
@ -77,6 +77,14 @@ class Migration(object):
Migrations.
"""
for operation in self.operations:
# If this operation cannot be represented as SQL, place a comment
# there instead
if collect_sql and not operation.reduces_to_sql:
schema_editor.collected_sql.append("--")
schema_editor.collected_sql.append("-- MIGRATION NOW PERFORMS OPERATION THAT CANNOT BE WRITTEN AS SQL:")
schema_editor.collected_sql.append("-- %s" % operation.describe())
schema_editor.collected_sql.append("--")
continue
# Get the state after the operation has run
new_state = project_state.clone()
operation.state_forwards(self.app_label, new_state)
@ -86,7 +94,7 @@ class Migration(object):
project_state = new_state
return project_state
def unapply(self, project_state, schema_editor):
def unapply(self, project_state, schema_editor, collect_sql=False):
"""
Takes a project_state representing all migrations prior to this one
and a schema_editor for a live database and applies the migration
@ -95,8 +103,17 @@ class Migration(object):
# We need to pre-calculate the stack of project states
to_run = []
for operation in self.operations:
# If this operation cannot be represented as SQL, place a comment
# there instead
if collect_sql and not operation.reduces_to_sql:
schema_editor.collected_sql.append("--")
schema_editor.collected_sql.append("-- MIGRATION NOW PERFORMS OPERATION THAT CANNOT BE WRITTEN AS SQL:")
schema_editor.collected_sql.append("-- %s" % operation.describe())
schema_editor.collected_sql.append("--")
continue
# If it's irreversible, error out
if not operation.reversible:
raise Migration.IrreversibleError("Operation %s in %s is not reversible" % (operation, sekf))
raise Migration.IrreversibleError("Operation %s in %s is not reversible" % (operation, self))
new_state = project_state.clone()
operation.state_forwards(self.app_label, new_state)
to_run.append((operation, project_state, new_state))

3
django/db/migrations/operations/special.py
View File

@ -132,3 +132,6 @@ class RunPython(Operation):
def database_backwards(self, app_label, schema_editor, from_state, to_state):
raise NotImplementedError("You cannot reverse this operation")
def describe(self):
return "Raw Python operation"