database-first


How to exclude some column from .edmx file, *.csdl ,*.msdl, and *.ssdl dynamically using Database first Approach

懵懂的女人 提交于 2020-01-14 02:29:08
问题 what i am trying to do is exclude few column from EF store and EF modal. for reference there are two method : https://stackoverflow.com/a/40742144/4998968 but i want to exclude column when edmx file is created i.e when i connect my database using Ado.net Data modal option i want few columns to be excluded from edmx as if they don't exists in database. currently i am exploring the entity framework source code but cannot find the exact code that generates .edmx file and store. example: suppose

Code First vs. Database First

一个人想着一个人 提交于 2020-01-10 09:38:11
问题 I created an Entity Framework model based on an existing database, then generated the POCO entities from the model. The connection string in my web.config isn't Entity Framework, it's just the standard connection string (it's missing the CSDL, SSDL, MSL references). I can compile my application, but when I run I get this error: Code generated using the T4 templates for Database First and Model First development may not work correctly if used in Code First mode. To continue using Database

How to get MVC-mini-profiler working on EF 4.1 Database First

大城市里の小女人 提交于 2019-12-24 00:14:12
问题 Spent better part of the day combing through SO for this. Here's the setup MVC 3 App using Repository pattern with 3 repositories across 2 databases. EF 4.1 Database first using the DBContext API for both db connections. Installed mvc-mini-profiler from nuget This is how I create my Db Context in the repository public class TransactionRepository : BaseRepository, ITransactionRepository { AccountingEntities _db = new AccountingEntities(); // repository methods } Then in controllers public

Adding validation to model with Database First model (EF 5)

时间秒杀一切 提交于 2019-12-23 15:35:06
问题 I know how to add validation errors to the model state. I know how to add the validation annotations to my model classes. The problem is that with Database first, I don't want to touch the generated code, because when I regenerate, I will lose my customization. I always try to customize in partials, but you can't add annotation to an existing property in a partial. What is best practice here? 回答1: You need to take advantage of MetadataTypeAttribute Do something like this: Create a new class

Database first Entity Framework mapping unique foreign keys as one to many

久未见 提交于 2019-12-23 10:57:41
问题 I have a table in Microsoft SQL Server 2008 R2 called Page with a primary key called ID . I have another table called Navigation with a column PageID . PageID is a unique foreign key reference to the ID column of Page . This creates a one to one relationship between Navigation and Page records. When generating models from the database, it creates a one to many relationship where a Page contains a list of Navigation records. Is this simply the Entity Framework detecting that there is a foreign

Database first Entity Framework mapping unique foreign keys as one to many

江枫思渺然 提交于 2019-12-23 10:57:02
问题 I have a table in Microsoft SQL Server 2008 R2 called Page with a primary key called ID . I have another table called Navigation with a column PageID . PageID is a unique foreign key reference to the ID column of Page . This creates a one to one relationship between Navigation and Page records. When generating models from the database, it creates a one to many relationship where a Page contains a list of Navigation records. Is this simply the Entity Framework detecting that there is a foreign

Entity Framework Database First - Relationships

♀尐吖头ヾ 提交于 2019-12-23 04:24:57
问题 I think I have CodeFirst understood. Now I know database first EF design is targeted for existing databases, but if I were to quickly go in and create a new database in management studio and create some tables, is it normal that you would create relationships for the tables in management studio or in the edmx designer, I tried in the edmx but got errors when I went to debug. What is the best practice here and what are the correct steps to create Associations between tables if I were to do it

Entity Framework Database First regeneration make me lose manual changes

寵の児 提交于 2019-12-21 03:13:48
问题 I'm making a website with MVC .NET. Since I'm an old school programmer who learn to design database first, I opted for the Database first approach. I'm also using "code generation" which create files with the extension .tt . Everything is working so far except one things that botters me. Classic scenario: I realise that I am missing one field I add the field in the database. I go into the edmx and choose to update the model from the database. Then I go back to my code and things that use to

How to add data annotation for entities automatically created by Data-First?

匆匆过客 提交于 2019-12-18 11:57:37
问题 If model-first, we use [MetadataType(typeof(ConceptMetadataSource))] to attach a MetadataSource file which contains all the data annotations like [HiddenInput(DisplayValue = false)] or [Display(Name = "Title")] . For example: [MetadataType(typeof(ConceptMetadataSource))] public partial class Concept ... Now, I am using database-first approach since there is an existing database. This time, the entity classes are automatically created by edmx model. At the beginning of each entity class, there

Entity Framework cant use the DbContext, model being created

江枫思渺然 提交于 2019-12-17 20:57:30
问题 I am using EF 4.1, and I create a normal EF edmx file. I generate it from a DB. When it's been generated I rightclick and select add code generation item, to generate new classes, and use the DbContext instead. I use the template DbContext generator. Everything works fine. Then I trie to query the context: using (var context = new PasDBEntities()) { var client=context.ClientCompanies.SingleOrDefault(_=>_.ID==clientCompanyId); if(client!=null) I have no problem creating a new instance of the

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