constraints

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A constraint that only allows one of two tables to reference a base table

I have 3 tables. A base table, call it Table A, and two tables that reference Table A, Call them Table X and Table Y. Both X and Y have a foreign key contraint that references Table A. The Foreign Key[详细]

2023-03-12 03:26 分类：问答
UPDATEing both referenced and referencing columns in a foreign key relationship

I have the following test case: DROP SCHEMA IF EXISTS test CASCADE; CREATE SCHEMA test; CREATE TABLE test.quz ([详细]

2023-03-11 21:14 分类：问答
Negative regex constraint in Rails 3 routes

I have some rental listings that I want to be accessible as RESTful resource, but also have the index be filtered through an :area parameter, which could be a neighborhood or region. Given the \'renta[详细]

2023-03-11 16:56 分类：问答
SQL uniqueness constraint when using wildcard values

Consider the following table, which specifies fruit that is forbidden on given days of the week. DayOfWeek is nullable, where a NULL signifies that this type of fruit is forbidden on all days of the w[详细]

2023-03-11 05:13 分类：问答
Column Constraint in SQL [duplicate]

This question already has answers here: Closed 11 years ago. Possible Dup开发者_C百科licate: SQL Server bit column constraint, 1 row = 1, all others 0[详细]

2023-03-10 17:54 分类：问答
Play! - max constraint doesn't work

I\'m having a problem with my application and @Max constraint annotation. My controller me开发者_如何学运维thod is defined like this:[详细]

2023-03-10 15:51 分类：问答
How do I define a generic class that implements an interface and constrains the type parameter?

class Sample<T> : IDisposable // case A { public 开发者_StackOverflowvoid Dispose() { throw new NotImplementedException();[详细]

2023-03-10 07:02 分类：问答
How to assert that collection contains only one element with given property value?

How do I assert that collection contains only one element with given property value? For example: class Node[详细]

2023-03-10 00:03 分类：问答
Dojo NumberTextBox : defining max constraint

I\'m having troubles with the NumberTextBox max constraint. If I use standard markup declaration and create the numbertextbox with default setting, e.g.[详细]

2023-03-09 23:51 分类：问答
test for generic method argument being a class

I have a generic method with this signature: private void MyGenericMethod<开发者_如何学C;T>(T arg) where T : class[详细]

2023-03-09 23:47 分类：问答