foreign-keys

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Using ActiveRecord.create with belongs_to associations

I\'m using Rails 3.1 and have a simple transaction class that references a User model: class User < ActiveRecord::Base[详细]

2023-04-05 13:09 分类：问答
how to use foreign keys as primary key

i have a table with two foreign keys as composite key. ActivityTbl - (activityNbr(PK), supervisor(FK), status, type, startDate, endDate, location )[详细]

2023-04-05 12:15 分类：问答
Django auth.User in Admininterface: coercing to Unicode: need string or buffer, User found

I\'m pretty new to django. I try to use the auth.User object as a foreign key. My model: from django.contrib.auth.models import User[详细]

2023-04-04 16:54 分类：问答
Django Related Manager Add

I have an intermediate model which is as follows - class Link_Book_Course(models.Model): book = models.ForeignKey(Book)[详细]

2023-04-04 09:36 分类：问答
Update django foreign key field

I have a foreign key field called books (in the model Book) in an intermediate model called Link_Book_Courses.[详细]

2023-04-04 07:52 分类：问答
Entity Framework Code first - FOREIGN KEY constraint problem

I\'m new to EF code first principal and currently with no clue what to do.. I have 2 POCO classes.. public class Problem[详细]

2023-04-04 07:27 分类：问答
MySQL and Entity Framework 4.0 - Foreign Keys

When generating a model from database in VS2010, I get my tables as entities, but the problem is t开发者_运维知识库hat the foreign keys aren\'t created.[详细]

2023-04-04 05:31 分类：问答
Is it alright to create foreign keys that are not really foreign keys in a database?

I have this mock database: users: userid companies: company_id user_id franchises: franchise_id company_id stores:[详细]

2023-04-04 03:39 分类：问答
Introducing FOREIGN KEY constraint 'c_name' on table 't_name' may cause cycles or multiple cascade paths

I have a database table called Lesson: columns: [LessonID, LessonNumber, Description] ...plus some other columns[详细]

2023-04-04 02:02 分类：问答
GRAILS Multiple composite foreign keys sharing the same table field?

I\'m trying to use grails with an existing old style legacy db. I have composite keys everywhere (PK and FK) and... more FK sharing the same table column. An example:[详细]

2023-04-03 21:51 分类：问答

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foreign-keys

Using ActiveRecord.create with belongs_to associations

how to use foreign keys as primary key

Django auth.User in Admininterface: coercing to Unicode: need string or buffer, User found

Django Related Manager Add

Update django foreign key field

Entity Framework Code first - FOREIGN KEY constraint problem

MySQL and Entity Framework 4.0 - Foreign Keys

Is it alright to create foreign keys that are not really foreign keys in a database?

Introducing FOREIGN KEY constraint 'c_name' on table 't_name' may cause cycles or multiple cascade paths

GRAILS Multiple composite foreign keys sharing the same table field?

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