ef-model-first

EF Model First with Stored Procedures

淺唱寂寞╮ 提交于 2019-12-03 21:52:58
问题 I'm using EF 4 with model-first...I generate the database from the model. How would I be able to use stored-procedures in that scenario? They should also be auto-generated with the database..? 回答1: You don't have any stored procedures with model first and there will not be generated. How could they be? Stored procedure is logic defined in the database and EF has no knowledge of that procedure so it cannot create them for you. If you want to use stored procedures create your database from

How to seed data when using Model First approach?

自古美人都是妖i 提交于 2019-12-03 08:40:18
问题 So I am learning MVC3 and EF4. I tried the code first method but it was too confusing for me.. I can create the classes no problem, but the hard part comes when dealing with foreign keys and the relationships between each other. But I've gone with model first. This way I can visually design it and see where the relationships are. After my model is create, it creates a SQL for me which I execute against my SQL Express database. Done, and done. Now I want data in my tables. Of course I can just

How to seed data when using Model First approach?

不问归期 提交于 2019-12-03 00:09:28
So I am learning MVC3 and EF4. I tried the code first method but it was too confusing for me.. I can create the classes no problem, but the hard part comes when dealing with foreign keys and the relationships between each other. But I've gone with model first. This way I can visually design it and see where the relationships are. After my model is create, it creates a SQL for me which I execute against my SQL Express database. Done, and done. Now I want data in my tables. Of course I can just add them in using server explorer, but most likely I will be making changes to my model as I go along.

1:1 relationship problems with EF Model First

↘锁芯ラ 提交于 2019-12-02 08:04:47
I'm trying to develop an application as Model-First with EF. I tried everything to accomplish a table-splitting pattern and a 1:1 relationship but looks like EF just doesn't let me. Assuming I do use Model-First - is there a way to put a 1:1 relationship without messing with the generated files and EF giving that annoying: Multiplicity is not valid in Role 'Blablalah' in relationship 'Blabalbala'. Because the Dependent Role properties are not the key properties, the upper bound of the multiplicity of the Dependent Role must be *. I already tried to set my FK's as Primary Keys on destination

Get entity facets and other metadata on runtime

你说的曾经没有我的故事 提交于 2019-12-02 03:46:54
I have .NET 4.0 WinForms Application, and I use Entity Framework 5 with Model First Approach. In VS EF Designer, I have created a dozen or so entities with a lot of scalar properties of String type, then in Properties Toolbar I have configured parameters (i.e. General parameters, Facets Parameters) for them, to fit DB requirements. In BL layer I am able to validate entity object in purpose to check whether it contains correct values, for example by using DbContext.Entry(Of T)(entity).GetValidationResult() method. But I need to develop also GUI layer input fields validation for WinForms. I

EF Model First with Stored Procedures

≡放荡痞女 提交于 2019-12-01 00:45:29
I'm using EF 4 with model-first...I generate the database from the model. How would I be able to use stored-procedures in that scenario? They should also be auto-generated with the database..? You don't have any stored procedures with model first and there will not be generated. How could they be? Stored procedure is logic defined in the database and EF has no knowledge of that procedure so it cannot create them for you. If you want to use stored procedures create your database from model and swap to database first. Then you can manually define your procedures and map them to the model. Once

EF4 Generate Database

丶灬走出姿态 提交于 2019-11-30 23:08:40
I am trying my hardest to find the simplest way to create a basic "model first" entity framework example. However I am struggling with the actually generation of the database, particularly the running of the SQL against the database. Tools Visual Studio 2010 SQL Server 2008 Express Process Create a new class project Add a new Server-Database item (mdf) named "Database1.mdf" to the project Add an empty ADO.net Entity Model Create a simple entity (Person: Id, Name) Generate the Script selecting the Database1 connection created for me by visual studio Right click the script editor and select the

Allow null foreign key GUID

拜拜、爱过 提交于 2019-11-30 17:01:50
问题 I want to create a nullable foreign key with type GUID like this [ForeignKey("CreatedBy")] [Display(Name = "Created by")] public Guid? CreatedById { get; set; } public virtual User CreatedBy { get; set; } But when I add migration and update the database it doesn't make it allow null in table design in SQL. Is there another way to make it allow null through model first ? 回答1: Not sure why yours doesn't work or if you figured it out. We have pretty much the same design and we get nullable

Migration using model first approach in entity framework

岁酱吖の 提交于 2019-11-30 13:49:48
问题 I have setup a system where I have taken the model first approach as it made more logical sense for me. Now when even I have some changes in the model currently what I do is - Use the Generate database from model feature of entity framework. I create a dummy database and apply those scripts. which deletes all my data and tables first and then updates the database with the latest sql file which is generated by entity framework. Now I use the Visual Studio's schema compare feature and generate

Using EF4 migration tool with model-first approach

与世无争的帅哥 提交于 2019-11-30 12:45:03
EF migration utility seems quite nice when using code first. Based on this blog post , I tried setting it in my project where we use model-first. When running Enable-Migrations command, I get the following error: Creating a DbModelBuilder or writing the EDMX from a DbContext created using Database First or Model First is not supported. EDMX can only be obtained from a Code First DbContext created without using an existing DbCompiledModel. Is there any way around it so we can use the EF migration without switching to code-first? I have an incomplete blog entry on how you could do this. Not sure