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Fixed #24550 -- Added migration operation description to sqlmigrate output 

Thanks Tim Graham for the review.
This commit is contained in:
Markus Holtermann 2015-03-29 16:59:35 +02:00
parent dc27f3ee0c
commit c5cc332bf2
6 changed files with 83 additions and 21 deletions
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17
django/db/migrations/migration.py
View File

@ -91,12 +91,15 @@ class Migration(object):
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:
if collect_sql:
schema_editor.collected_sql.append("--")
schema_editor.collected_sql.append("-- MIGRATION NOW PERFORMS OPERATION THAT CANNOT BE "
"WRITTEN AS SQL:")
if not operation.reduces_to_sql:
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("--")
if not operation.reduces_to_sql:
continue
# Save the state before the operation has run
old_state = project_state.clone()
@ -142,12 +145,14 @@ class Migration(object):
# Phase 2
for operation, to_state, from_state in to_run:
if collect_sql:
if 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:")
if not operation.reduces_to_sql:
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("--")
if not operation.reduces_to_sql:
continue
if not schema_editor.connection.features.can_rollback_ddl and operation.atomic:
# We're forcing a transaction on a non-transactional-DDL backend

11
docs/intro/tutorial01.txt
View File

@ -446,8 +446,8 @@ You should see something similar to the following:
Migrations for 'polls':
0001_initial.py:
- Create model Question
- Create model Choice
- Create model Question
- Add field question to choice
By running ``makemigrations``, you're telling Django that you've made
@ -476,16 +476,25 @@ readability):
.. code-block:: sql
BEGIN;
--
-- Create model Choice
--
CREATE TABLE "polls_choice" (
"id" serial NOT NULL PRIMARY KEY,
"choice_text" varchar(200) NOT NULL,
"votes" integer NOT NULL
);
--
-- Create model Question
--
CREATE TABLE "polls_question" (
"id" serial NOT NULL PRIMARY KEY,
"question_text" varchar(200) NOT NULL,
"pub_date" timestamp with time zone NOT NULL
);
--
-- Add field question to choice
--
ALTER TABLE "polls_choice" ADD COLUMN "question_id" integer NOT NULL;
ALTER TABLE "polls_choice" ALTER COLUMN "question_id" DROP DEFAULT;
CREATE INDEX "polls_choice_7aa0f6ee" ON "polls_choice" ("question_id");

3
docs/ref/contrib/gis/tutorial.txt
View File

@ -286,6 +286,9 @@ This command should produce the following output:
.. code-block:: sql
BEGIN;
--
-- Create model WorldBorder
--
CREATE TABLE "world_worldborder" (
"id" serial NOT NULL PRIMARY KEY,
"name" varchar(50) NOT NULL,

6
docs/ref/django-admin.txt
View File

@ -984,6 +984,12 @@ By default, the SQL created is for running the migration in the forwards
direction. Pass ``--backwards`` to generate the SQL for
unapplying the migration instead.
.. versionchanged:: 1.9
To increase the readability of the overall SQL output the SQL code
generated for each migration operation is preceded by the operation's
description.
sqlsequencereset <app_label app_label ...>
------------------------------------------

4
docs/releases/1.9.txt
View File

@ -152,6 +152,10 @@ Management Commands
* The new :djadmin:`sendtestemail` command lets you send a test email to
easily confirm that email sending through Django is working.
* To increase the readability of the SQL code generated by
:djadmin:`sqlmigrate`, the SQL code generated for each migration operation is
preceded by the operation's description.
Models
^^^^^^

57
tests/migrations/test_commands.py
View File

@ -289,29 +289,64 @@ class MigrateTests(MigrationTestBase):
)
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
def test_sqlmigrate(self):
def test_sqlmigrate_forwards(self):
"""
Makes sure that sqlmigrate does something.
"""
# Make sure the output is wrapped in a transaction
out = six.StringIO()
call_command("sqlmigrate", "migrations", "0001", stdout=out)
output = out.getvalue()
self.assertIn(connection.ops.start_transaction_sql(), output)
self.assertIn(connection.ops.end_transaction_sql(), output)
output = out.getvalue().lower()
# Test forwards. All the databases agree on CREATE TABLE, at least.
out = six.StringIO()
call_command("sqlmigrate", "migrations", "0001", stdout=out)
self.assertIn("create table", out.getvalue().lower())
index_tx_start = output.find(connection.ops.start_transaction_sql().lower())
index_op_desc_author = output.find('-- create model author')
index_create_table = output.find('create table')
index_op_desc_tribble = output.find('-- create model tribble')
index_op_desc_unique_together = output.find('-- alter unique_together')
index_tx_end = output.find(connection.ops.end_transaction_sql().lower())
self.assertGreater(index_tx_start, -1, "Transaction start not found")
self.assertGreater(index_op_desc_author, index_tx_start,
"Operation description (author) not found or found before transaction start")
self.assertGreater(index_create_table, index_op_desc_author,
"CREATE TABLE not found or found before operation description (author)")
self.assertGreater(index_op_desc_tribble, index_create_table,
"Operation description (tribble) not found or found before CREATE TABLE (author)")
self.assertGreater(index_op_desc_unique_together, index_op_desc_tribble,
"Operation description (unique_together) not found or found before operation description (tribble)")
self.assertGreater(index_tx_end, index_op_desc_unique_together,
"Transaction end not found or found before operation description (unique_together)")
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations"})
def test_sqlmigrate_backwards(self):
"""
Makes sure that sqlmigrate does something.
"""
# Cannot generate the reverse SQL unless we've applied the migration.
call_command("migrate", "migrations", verbosity=0)
# And backwards is a DROP TABLE
out = six.StringIO()
call_command("sqlmigrate", "migrations", "0001", stdout=out, backwards=True)
self.assertIn("drop table", out.getvalue().lower())
output = out.getvalue().lower()
index_tx_start = output.find(connection.ops.start_transaction_sql().lower())
index_op_desc_unique_together = output.find('-- alter unique_together')
index_op_desc_tribble = output.find('-- create model tribble')
index_op_desc_author = output.find('-- create model author')
index_drop_table = output.rfind('drop table')
index_tx_end = output.find(connection.ops.end_transaction_sql().lower())
self.assertGreater(index_tx_start, -1, "Transaction start not found")
self.assertGreater(index_op_desc_unique_together, index_tx_start,
"Operation description (unique_together) not found or found before transaction start")
self.assertGreater(index_op_desc_tribble, index_op_desc_unique_together,
"Operation description (tribble) not found or found before operation description (unique_together)")
self.assertGreater(index_op_desc_author, index_op_desc_tribble,
"Operation description (author) not found or found before operation description (tribble)")
self.assertGreater(index_drop_table, index_op_desc_author,
"DROP TABLE not found or found before operation description (author)")
self.assertGreater(index_tx_end, index_op_desc_unique_together,
"Transaction end not found or found before DROP TABLE")
# Cleanup by unmigrating everything
call_command("migrate", "migrations", "zero", verbosity=0)