one-to-one
Check if OneToOneField is None in Django
I have two models like this: class Type1Profile(models.Model): 开发者_JS百科user = models.OneToOneField(User, unique=True)[详细]
2023-01-10 23:58 分类:问答Why hibernate perform two queries for eager load a @OneToOne bidirectional association?
i have entity A that has-a 开发者_运维问答B entity, and B has-a A with @OneToOne bidirectional association.[详细]
2023-01-09 13:57 分类:问答One to one relationship in Sql Server and LINQ
I have a Users table and a profile table.The reason they are separate is because infor开发者_如何学Pythonmation about the user can be put in before they are registered for the site.The problem I\'m ru[详细]
2023-01-06 03:23 分类:问答In a One to One relationship should i drop one of the table's id column?
I have the following 2 tables in MySQ开发者_开发百科L: Customer(Id, Firstname, Lastname...) Bonus(Id, CustomerId, Value, ...)[详细]
2023-01-03 10:36 分类:问答How to do this Unidirectional NHibernate one-to-one mapping?
This is a problem of unidirectional one-to-one mapping in NHibernate. Student.cs public class Student { public int ID { get; set; }[详细]
2023-01-02 19:26 分类:问答@OneToOne annotoation problem (i think...)
im new in hibernate and JPA and i have some problems with annotations. My target is to create this table in db (PERSON_TABLE with personal-details)[详细]
2023-01-02 03:55 分类:问答How do map 1-to-1 relationship in grails to just 1 table under the covers?
Let\'s say I have a UserAccount domain class that has a UserPreferences domain class. I do this to sepa开发者_如何学编程rate the fields for organization purposes. Is there a way to tell grails/gorm th[详细]
2023-01-01 10:06 分类:问答Nhibernate One-to-one mapping issue with child object insert error
i\'ve being banging my head against the desk all day with the following Nhibernate problem. Each bank account has one (and only one) set of rates associated with it. The primary key of the bank accou[详细]
2022-12-30 04:27 分类:问答In SQL / MySQL, are there reasons not to put one-to-one relationship in the same table?
One-to-one relationship could usually be stored in the same table.Are there reasons not to store them in the same t开发者_JS百科able?Number and type of columns. There is a limit on the size of the col[详细]
2022-12-28 10:44 分类:问答NHibernate - I have many, but I only want one!
I have a User which can have many Emails. This is mapped through a List collection (exposed by IEnumerable Emails on the User).[详细]
2022-12-26 18:54 分类:问答