django创建数据库表方法

catcher:mysite catcher$ python manage.py makemigrations books
Migrations for 'books':
  0001_initial.py:
    - Create model Author
    - Create model Book
    - Create model Publisher
    - Add field publisher to book
catcher:mysite catcher$ python manage.py sqlmigrate books 0001
BEGIN;
--
-- Create model Author
--
CREATE TABLE "books_author" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "first_name" varchar(30) NOT NULL, "last_name" varchar(40) NOT NULL, "email" varchar(254) NOT NULL);
--
-- Create model Book
--
CREATE TABLE "books_book" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "title" varchar(100) NOT NULL, "publication_date" date NOT NULL);
CREATE TABLE "books_book_authors" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "book_id" integer NOT NULL REFERENCES "books_book" ("id"), "author_id" integer NOT NULL REFERENCES "books_author" ("id"));
--
-- Create model Publisher
--
CREATE TABLE "books_publisher" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "name" varchar(30) NOT NULL, "address" varchar(50) NOT NULL, "city" varchar(60) NOT NULL, "state_province" varchar(30) NOT NULL, "country" varchar(50) NOT NULL, "website" varchar(200) NOT NULL);
--
-- Add field publisher to book
--
ALTER TABLE "books_book" RENAME TO "books_book__old";
CREATE TABLE "books_book" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "title" varchar(100) NOT NULL, "publication_date" date NOT NULL, "publisher_id" integer NOT NULL REFERENCES "books_publisher" ("id"));
INSERT INTO "books_book" ("publication_date", "publisher_id", "id", "title") SELECT "publication_date", NULL, "id", "title" FROM "books_book__old";
DROP TABLE "books_book__old";
CREATE INDEX "books_book_2604cbea" ON "books_book" ("publisher_id");

COMMIT;
catcher:mysite catcher$ 

catcher:mysite catcher$ sudo python manage.py migrate
Password:
Operations to perform:
  Apply all migrations: admin, contenttypes, books, auth, sessions
Running migrations:
  Rendering model states... DONE
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying books.0001_initial... OK
  Applying sessions.0001_initial... OK
catcher:mysite catcher$