identity

问题 I've been trying to insert row in the table having an identity column RequestID (which is primary key as well) HelpdeskLog logEntry = new HelpdeskLog { RequestBody = message.Body }; if (attachment != null) logEntry.Attachments = Helper.StreamToByteArray(attachment.ContentStream); Database.HelpdeskLogs.InsertOnSubmit(logEntry); But my code inevitably throws following error Can't perform Create, Update or Delete operations on Table because it has no primary key. despite primary key column

问题 Someone tell me I should first do configure SCEP using IPCU,so I set a SCEP sever in Windows sever 2008.Then set the URL in the SCEP payload. but I can't install the Configuration Profile with MDM Payload. And someone tell me I should add in a p12 file/certificate as a 'Credential' in iPCU and pick this from the list in the MDM view.But I don't success. Is any a p12 file/certificate useful ? Thank someone for the help. I need the answer for next step. Thank you! 回答1: If you are using self

问题 In SQL Server (in my case, 2005) how can I add the identity property to an existing table column using T-SQL? Something like: alter table tblFoo alter column bar identity(1,1) 回答1: I don't beleive you can do that. Your best bet is to create a new identity column and copy the data over using an identity insert command (if you indeed want to keep the old values). Here is a decent article describing the process in detail: http://www.mssqltips.com/tip.asp?tip=1397 回答2: The solution posted by

问题 In Ruby 1.9.2 on Rails 3.0.3 , I'm attempting to test for object equality between two Friend (class inherits from ActiveRecord::Base ) objects. The objects are equal, but the test fails: Failure/Error: Friend.new(name: 'Bob').should eql(Friend.new(name: 'Bob')) expected #<Friend id: nil, event_id: nil, name: 'Bob', created_at: nil, updated_at: nil> got #<Friend id: nil, event_id: nil, name: 'Bob', created_at: nil, updated_at: nil> (compared using eql?) Just for grins, I also test for object

问题 In Ruby 1.9.2 on Rails 3.0.3 , I'm attempting to test for object equality between two Friend (class inherits from ActiveRecord::Base ) objects. The objects are equal, but the test fails: Failure/Error: Friend.new(name: 'Bob').should eql(Friend.new(name: 'Bob')) expected #<Friend id: nil, event_id: nil, name: 'Bob', created_at: nil, updated_at: nil> got #<Friend id: nil, event_id: nil, name: 'Bob', created_at: nil, updated_at: nil> (compared using eql?) Just for grins, I also test for object

问题 This question already has answers here : About the changing id of an immutable string (5 answers) Closed last year . Why does "hello" is "hello" produce True in Python? I read the following here: If two string literals are equal, they have been put to same memory location. A string is an immutable entity. No harm can be done. So there is one and only one place in memory for every Python string? Sounds pretty strange. What's going on here? 回答1: Python (like Java, C, C++, .NET) uses string

问题 I have a model as below : public class BaseModel { public DateTime? CrDate { get; set; } [ForeignKey("CrUser")] public ApplicationUser UserCr { get; set; } public string CrUser { get; set; } public DateTime? MdDate { get; set; } [ForeignKey("MdUser")] public ApplicationUser UserMd { get; set; } public string MdUser { get; set; } public bool IsDeleted { get; set; } public void LogWhatever() { this.CrDate = System.DateTime.Now; this.CrUser = ????? } } How can i get the logged userID from model

问题 I'm considering using the functions of WSO2 IS. However, I already have WSO2 ESB deployed in a production environment, so I'd prefer to add IS features to the already existent ESB environment. I was able to start with the IS 4.1.0 bundle, add the Carbon 4.0.5 P2 repository (ESB 4.6.0 is built upon that version of Carbon) and install ESB 4.6.0 features, but I cannot seem to be able to do the opposite, since as far as I can tell WSO2 IS is based on Carbon 4.0.6, but there's no P2 repo for it.

问题 Updated: Thanks for responding on my post. I am very sorry, as of today these were the requirement details. However, I can elaborate more on what I understand. I some idea on WIF, where I can write my own STS, RP and publish policies. Couple of queries here. Do we need to have an IdP and should we connect STS to IdP. if not, can we go without IdP. I will have to use claim base authentication and federated identity mgmt in the application.we do not depend on AD/LDAP integration. Imp

问题 I want to create a column with identity property and I want to specify its max value. For example: CREATE TABLE tbl ( ID int PRIMARY KEY identity(1,1) ) I want to specify 20000 as a max value for ID. 回答1: alter table tbl add constraint CHK_TBL_MAX_ID check (id <= 2000) Example at SQL Fiddle. 来源： https://stackoverflow.com/questions/17652741/sql-server-set-identity-max-value