I\'m writing routines to inspect an instance and find all its relations (e.g. using instance._meta.get_all_related_objects()) but I can\'t find a way to get relations involving a OneToOneFie开发者_如何
I have this ER model Message 0..1 <--> 0..1 MessageDetail PK:ID_MESSAGEPK: ID_DETA开发者_Python百科IL
Suppose you have two tables that are in a one-to-one relationship; i.e. the primary key of the child table is also the foreign key that links it to the parent table. Suppose also that the primary key
I have two classes, Foo and Bar, in a Django app (on AppEngine if that matters). There\'s a one to one relationship between them.
How can I make an one-to-one relationship between 2 subclasses wh开发者_JAVA百科en they do not have the ID property? Because each of them was inherited the Id property from superclass so I cannot put
how can I define a data model (including 2 classes A and B, B is contained in A) that satisfy the B\'s id is the same with A\'s id (because I want to make 开发者_开发百科an one-to-one relationship bet
I\'m working on a project with Hibernate and MySQL, use annotation for mapping database to data object model. I need to mapping one-to-one between superclass and subclass on ID primary key of their cl
Is it possible to map a subclas开发者_开发知识库s to its superclass by OneToOne relationship base on their primary key properties in Hibernate? How can I implement this?You can do it with the JOINED i
When sending mass mails with PHP, is it better to send each subscriber an e-mail (running 开发者_运维技巧a for loop through all the e-mail addresses) or is it better to just add all in BCC in a comma
I\'m new to Hibernate, and I can\'t get @OneToOne to function in our code. After much reading, I\'ve constructed an isolates example, and thought to ask the help of the community.
加载中,请稍侯......