I have two t开发者_StackOverflowables : VOTE with fields pk:id, fk:uid, date and SUBMISSION with fields pk:id, ....
I\'m having an issue with cascade deletion of dependent objects with composite keys.Specifically, the emitted SQL instructions by EF tries to delete the principle entity before the dependent entity.
So I 开发者_开发技巧am just wondering what it means for a foreign key relationship. I have two tables. Courses and Schools. One school can have many courses. So does the following relationship make se
I have two MySQL tables A and B. Table A has a member ref which is a ForeignKey reference to B.id. This makes for a 1:many association between B and A.
I\'m trying to get some understanding of how Wordpress works and while inspecting the database I found that, in a multisite ins开发者_如何学运维tallation, there is a table called wp_site that seemsalw
There seems to be hardly any examples out there so here goes: Here are my three structures but it doesn\'t seem to create the tables properly and when I call the following line it says Id is not reco
A bit frustrated over here. I\'m trying to find a way to support update cascading with the entity framework, and there doesn\'t seem to be a built-in way. Research on the net basically shows everyone
I have this strange problem. In a J2ee webapp with spring, smartgwt and hibernate, it happens that I have a class A wich has a set of class B, both of them mapped to table A and table B.
I\'m working on a small blog engine. There are the following tables: Blog and Message. Blog has a foreign key: last_message_id, so I access the last message in the blog by calling blog.last_message
I have a django model like so: class Profile_Tag(models.Model): profile = models.ForeignKey(Profile) tag = models.ForeignKey(Tag)
加载中,请稍侯......