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|
"""
Schema Evolution Tests
"""
from django.db import models
from django.conf import settings
GENDER_CHOICES = (
('M', 'Male'),
('F', 'Female'),
)
class Person(models.Model):
name = models.CharField(maxlength=20)
gender = models.CharField(maxlength=1, choices=GENDER_CHOICES)
gender2 = models.CharField(maxlength=1, choices=GENDER_CHOICES, aka='gender_old')
def __unicode__(self):
return self.name
class Meta:
aka = ('PersonOld', 'OtherBadName')
__test__ = {'API_TESTS':"""
>>> import django
>>> from django.core import management
>>> from django.db import backend, models
>>> from django.db import connection, get_introspection_module
>>> app = models.get_apps()[-1]
>>> cursor = connection.cursor()
"""}
if settings.DATABASE_ENGINE == 'mysql':
__test__['API_TESTS'] += """
# the table as it is supposed to be
>>> create_table_sql = management.get_sql_all(app)
>>> print create_table_sql
['CREATE TABLE `schema_evolution_person` (\\n `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\\n `name` varchar(20) NOT NULL,\\n `gender` varchar(1) NOT NULL,\\n `gender2` varchar(1) NOT NULL\\n)\\n;']
# make sure we don't evolve an unedited table
>>> management.get_sql_evolution(app)
[]
# delete a column, so it looks like we've recently added a field
>>> sql = backend.get_drop_column_sql( 'schema_evolution_person', 'gender' )
>>> print sql
['ALTER TABLE `schema_evolution_person` DROP COLUMN `gender`;']
>>> for s in sql: cursor.execute(s)
0L
>>> management.get_sql_evolution(app)
['ALTER TABLE `schema_evolution_person` ADD COLUMN `gender` varchar(1) NOT NULL;']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;'); cursor.execute(create_table_sql[0])
0L\n0L
# add a column, so it looks like we've recently deleted a field
>>> cursor.execute('ALTER TABLE `schema_evolution_person` ADD COLUMN `gender_nothere` varchar(1) NOT NULL;')
0L
>>> management.get_sql_evolution(app)
['-- warning: the following may cause data loss', u'ALTER TABLE `schema_evolution_person` DROP COLUMN `gender_nothere`;', '-- end warning']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;'); cursor.execute(create_table_sql[0])
0L\n0L
# rename column, so it looks like we've recently renamed a field
>>> cursor.execute('ALTER TABLE `schema_evolution_person` CHANGE COLUMN `gender2` `gender_old` varchar(1) NOT NULL;')
0L
>>> management.get_sql_evolution(app)
['ALTER TABLE `schema_evolution_person` CHANGE COLUMN `gender_old` `gender2` varchar(1) NOT NULL;']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;'); cursor.execute(create_table_sql[0])
0L\n0L
# rename table, so it looks like we've recently renamed a model
>>> cursor.execute('ALTER TABLE `schema_evolution_person` RENAME TO `schema_evolution_personold`')
0L
>>> management.get_sql_evolution(app)
['ALTER TABLE `schema_evolution_personold` RENAME TO `schema_evolution_person`;']
# reset the db
>>> cursor.execute(create_table_sql[0])
0L
# change column flags, so it looks like we've recently changed a column flag
>>> cursor.execute('ALTER TABLE `schema_evolution_person` MODIFY COLUMN `name` varchar(10) NULL;')
0L
>>> management.get_sql_evolution(app)
['ALTER TABLE `schema_evolution_person` MODIFY COLUMN `name` varchar(20) NOT NULL;']
"""
if settings.DATABASE_ENGINE == 'postgresql':
__test__['API_TESTS'] += """
# the table as it is supposed to be
>>> create_table_sql = management.get_sql_all(app)
>>> print create_table_sql
['CREATE TABLE "schema_evolution_person" (\\n "id" serial NOT NULL PRIMARY KEY,\\n "name" varchar(20) NOT NULL,\\n "gender" varchar(1) NOT NULL,\\n "gender2" varchar(1) NOT NULL\\n)\\n;']
# make sure we don't evolve an unedited table
>>> management.get_sql_evolution(app)
[]
# delete a column, so it looks like we've recently added a field
>>> for sql in backend.get_drop_column_sql( 'schema_evolution_person', 'gender' ): cursor.execute(sql)
>>> management.get_sql_evolution(app)
['ALTER TABLE "schema_evolution_person" ADD COLUMN "gender" varchar(1);', 'ALTER TABLE "schema_evolution_person" ALTER COLUMN "gender" SET NOT NULL;']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;'); cursor.execute(create_table_sql[0])
# add a column, so it looks like we've recently deleted a field
>>> for sql in backend.get_add_column_sql( 'schema_evolution_person', 'gender_nothere', 'varchar(1)', True, False, False ): cursor.execute(sql)
>>> management.get_sql_evolution(app)
['-- warning: the following may cause data loss', u'ALTER TABLE "schema_evolution_person" DROP COLUMN "gender_nothere";', '-- end warning']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;'); cursor.execute(create_table_sql[0])
# rename column, so it looks like we've recently renamed a field
>>> for sql in backend.get_change_column_name_sql( 'schema_evolution_person', {}, 'gender2', 'gender_old', 'varchar(1)' ): cursor.execute(sql)
>>> management.get_sql_evolution(app)
['ALTER TABLE "schema_evolution_person" RENAME COLUMN "gender_old" TO "gender2";']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;'); cursor.execute(create_table_sql[0])
# rename table, so it looks like we've recently renamed a model
>>> for sql in backend.get_change_table_name_sql( 'schema_evolution_personold', 'schema_evolution_person' ): cursor.execute(sql)
>>> management.get_sql_evolution(app)
['ALTER TABLE "schema_evolution_personold" RENAME TO "schema_evolution_person";']
# reset the db
>>> cursor.execute(create_table_sql[0])
# change column flags, so it looks like we've recently changed a column flag
>>> for sql in backend.get_change_column_def_sql( 'schema_evolution_person', 'name', 'varchar(10)', True, False, False ): cursor.execute(sql)
>>> management.get_sql_evolution(app)
['ALTER TABLE "schema_evolution_person" ADD COLUMN "name_tmp" varchar(20);', 'UPDATE "schema_evolution_person" SET "name_tmp" = "name";', 'ALTER TABLE "schema_evolution_person" DROP COLUMN "name";', 'ALTER TABLE "schema_evolution_person" RENAME COLUMN "name_tmp" TO "name";', 'ALTER TABLE "schema_evolution_person" ALTER COLUMN "name" SET NOT NULL;']
"""
if settings.DATABASE_ENGINE == 'sqlite3':
__test__['API_TESTS'] += """
# the table as it is supposed to be
>>> create_table_sql = management.get_sql_all(app)
>>> print create_table_sql
['CREATE TABLE "schema_evolution_person" (\\n "id" integer NOT NULL UNIQUE PRIMARY KEY,\\n "name" varchar(20) NOT NULL,\\n "gender" varchar(1) NOT NULL,\\n "gender2" varchar(1) NOT NULL\\n)\\n;']
# make sure we don't evolve an unedited table
>>> management.get_sql_evolution(app)
[]
# delete a column, so it looks like we've recently added a field
>>> cursor.execute( 'DROP TABLE "schema_evolution_person";' ).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute( 'CREATE TABLE "schema_evolution_person" ( "id" integer NOT NULL UNIQUE PRIMARY KEY, "name" varchar(20) NOT NULL, "gender" varchar(1) NOT NULL );' ).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> management.get_sql_evolution(app)
['ALTER TABLE "schema_evolution_person" ADD COLUMN "gender2" varchar(1) NOT NULL;']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute(create_table_sql[0]).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
# add a column, so it looks like we've recently deleted a field
>>> cursor.execute( 'DROP TABLE "schema_evolution_person";' ).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute( 'CREATE TABLE "schema_evolution_person" ( "id" integer NOT NULL UNIQUE PRIMARY KEY, "name" varchar(20) NOT NULL, "gender" varchar(1) NOT NULL, "gender2" varchar(1) NOT NULL, "gender_new" varchar(1) NOT NULL );' ).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute( 'insert into "schema_evolution_person" values (1,2,3,4,5);' ).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> sql = management.get_sql_evolution(app)
>>> print sql
['-- warning: the following may cause data loss', u'-- FYI: sqlite does not support deleting columns, so we create a new "gender_new" and delete the old (ie, this could take a while)', 'ALTER TABLE "schema_evolution_person" RENAME TO "schema_evolution_person_1337_TMP";', 'CREATE TABLE "schema_evolution_person" (\\n "id" integer NOT NULL UNIQUE PRIMARY KEY,\\n "name" varchar(20) NOT NULL,\\n "gender" varchar(1) NOT NULL,\\n "gender2" varchar(1) NOT NULL\\n)\\n;', 'INSERT INTO "schema_evolution_person" SELECT "id","name","gender","gender2" FROM "schema_evolution_person_1337_TMP";', 'DROP TABLE "schema_evolution_person_1337_TMP";', '-- end warning']
>>> for s in sql: cursor.execute(s).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute('select * from "schema_evolution_person";').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.fetchall()[0]
(1, u'2', u'3', u'4')
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute(create_table_sql[0]).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
# rename column, so it looks like we've recently renamed a field
>>> cursor.execute('DROP TABLE "schema_evolution_person"').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute('').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute('CREATE TABLE "schema_evolution_person" ("id" integer NOT NULL UNIQUE PRIMARY KEY, "name" varchar(20) NOT NULL, "gender" varchar(1) NOT NULL, "gender_old" varchar(1) NOT NULL );').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute( 'insert into "schema_evolution_person" values (1,2,3,4);' ).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> sql = management.get_sql_evolution(app)
>>> print sql
['-- FYI: sqlite does not support renaming columns, so we create a new "schema_evolution_person" and delete the old (ie, this could take a while)', 'ALTER TABLE "schema_evolution_person" RENAME TO "schema_evolution_person_1337_TMP";', 'CREATE TABLE "schema_evolution_person" (\\n "id" integer NOT NULL UNIQUE PRIMARY KEY,\\n "name" varchar(20) NOT NULL,\\n "gender" varchar(1) NOT NULL,\\n "gender2" varchar(1) NOT NULL\\n)\\n;', 'INSERT INTO "schema_evolution_person" SELECT "id","name","gender","gender_old" FROM "schema_evolution_person_1337_TMP";', 'DROP TABLE "schema_evolution_person_1337_TMP";']
>>> for s in sql: cursor.execute(s).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute('select * from "schema_evolution_person";').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.fetchall()[0]
(1, u'2', u'3', u'4')
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_person;').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute(create_table_sql[0]).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
# rename table, so it looks like we've recently renamed a model
>>> for sql in backend.get_change_table_name_sql( 'schema_evolution_personold', 'schema_evolution_person' ): cursor.execute(sql).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> management.get_sql_evolution(app)
['ALTER TABLE "schema_evolution_personold" RENAME TO "schema_evolution_person";']
# reset the db
>>> cursor.execute('DROP TABLE schema_evolution_personold;').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute(create_table_sql[0]).__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
# change column flags, so it looks like we've recently changed a column flag
>>> cursor.execute('DROP TABLE "schema_evolution_person";').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> cursor.execute('CREATE TABLE "schema_evolution_person" ( "id" integer NOT NULL UNIQUE PRIMARY KEY, "name" varchar(20) NOT NULL, "gender" varchar(1) NOT NULL, "gender2" varchar(1) NULL);').__class__
<class 'django.db.backends.sqlite3.base.SQLiteCursorWrapper'>
>>> management.get_sql_evolution(app)
['-- FYI: sqlite does not support changing columns, so we create a new "schema_evolution_person" and delete the old (ie, this could take a while)', 'ALTER TABLE "schema_evolution_person" RENAME TO "schema_evolution_person_1337_TMP";', 'CREATE TABLE "schema_evolution_person" (\\n "id" integer NOT NULL UNIQUE PRIMARY KEY,\\n "name" varchar(20) NOT NULL,\\n "gender" varchar(1) NOT NULL,\\n "gender2" varchar(1) NOT NULL\\n)\\n;', 'INSERT INTO "schema_evolution_person" SELECT "id","name","gender","gender2" FROM "schema_evolution_person_1337_TMP";', 'DROP TABLE "schema_evolution_person_1337_TMP";']
"""
|
