Making Date and Numeric Fields Optional

PostgreSQL: ALTER TABLE books_book ALTER COLUMN publication_date DROP NOT NULL;

Sqlite Manage: Delete && Creat

	ALTER TABLE "main"."books_book" RENAME TO "oXHFcGcd04oXHFcGcd04_books_book"
	CREATE TABLE "main"."books_book" ("id" integer PRIMARY KEY  NOT NULL ,"title" varchar(100) NOT NULL ,"publisher_id" integer NOT NULL )
	INSERT INTO "main"."books_book" SELECT "id","title","publisher_id" FROM "main"."oXHFcGcd04oXHFcGcd04_books_book"
	DROP TABLE "main"."oXHFcGcd04oXHFcGcd04_books_book"
	ALTER TABLE "main"."books_book" ADD COLUMN "publication_date" DATETIME

http://localhost:8080/admin/books/book/add/
Customizing Field Labels

http://localhost:8080/admin/books/author/add/

first_name => First name:
last_name => Last name:
e-mail => E-mail:
Customizing admin change lists

http://localhost:8080/admin/books/author/