Entity Framework Core - Knowledge Base (KB)
2454 results for: in tag: c#
EF Core Mapping EntityTypeConfiguration
In EF6 we usually able to use this way to configure the Entity....public class AccountMap : EntityTypeConfiguration<Account> { public AccountMap() { ToTable("Account"); HasKey(a => a.Id); Property(a => a.Username).HasMaxLe...
asked by Herman
How handle these two models in code first approach using Entity Framework 7?
Problem...I am coding proof of concept ASP.NET 5 MVC6 that will simulate a library. I am using CTP6 and beta3. ...How to define their relationship in Entity Framework 7 using code first approach? ...Shelf and Books need a join table. As I see it, this app...
asked by hlyates
ASP vNext and PostgreSql
exists currently any way, how to communicate with PostgreSql database, when I want to use ASP.NET vNext? I'm looking for solution, which will work mainly on linux....EF7 supports only MS SQL a SqlLite now and Npgsql isn't ported for ASP.NET vNext....Thank...
asked by Rudis
EF7 contructor with MVC6 dependency injection
Testing out the new MVC6 and EF7 framework....We often need the HttpContext in our database layers. To do this in MVC6 we simply have a DbContext constructor that looks like this:... public class ApplicationDbContext : IdentityDbContext<ApplicationUser> ...
asked by Feech
Is there an Entity Framework 7 Database-First POCO Generator?
I've been playing around with Entity Framework 7 and ASP.NET 5 for a new project I'm working on, but I've hit a roadblock. The team I'm working on uses a DBA-first approach to development; i.e. the database is designed by DBA's and then the developers alt...
asked by Ron Penton
ASP.NET 5 MVC 6 and Entity Framework 7 issues
We can't add Owin and Entity framework 7 together. As we do so then there will be ambiguity between Microsoft.AspNet.Identity.core 2.0.0.0 and Microsoft.AspNet.Identity 3.0.0 Beta1...And hence I am not able to implement role provider in my application to ...
asked by sanjaypujari
EF 7 (Beta 7) One-to-One Relationship
I've noticed questions that have answered this problem for earlier beta versions of EF 7 (like ...here...), but I haven't seen it solved for Beta 7, so here it goes:...I have 2 entities, simplified as follows:...public class FirstEntity { public int F...
asked by IronMan84
EntityFramework 7, migrations and ConnectionString
I'm trying to create a simple web site using asp.net vnext and EF 7.0. For development I use localDB and migrations work well. Then I deploy my site to Azure and want to apply migrations to Azure SQL Server....Is there any way to apply migrations to the p...
asked by Gengzu
Define an Entity with a Unique Key at the Model Level
Using asp.net 5 entity framework 7, I would like to define a field with a unique key constraint at the model level. I am not talking about a primary key. I believe in EF 6 it used to be something like this:... [Key] public int Id{ get; set; } ...
asked by Reafidy
EF7 beta5: Foreign Key returns null value
I have created an API using ASP.NET5 and Entity Framework 7.0.0-beta 5. ...I have the Model, DbContext and the Repository created, and when I try to retrieve data from my database I get all the data, except the foreign key data....The foreign key value is...
asked by unairoldan
EF7 beta5: Error trying to insert child entity
I have created an API using ASP.NET5 and Entity Framework 7.0.0-beta 5....I have the Model, DbContext and the Repository created as is described ...here..., and when I try to insert data with a child entity my app throw an exception: ..."Cannot insert the...
asked by unairoldan
EF 7 beta 6 : Entities with one to many relationships in EF 7
I have a very simple model:...class Bag { public int Id { get; set; } public ICollection<RandomThing> RandomThings { get; set; } } class RandomThing { public int Id { get; set; } public String Description{ get; set; } } ...My context's ..
asked by Lutando
Can these models be represented in EF7?
I'm trying to use some classes from another assembly in my own project as entities that I can persist using EF7, rather than writing a series of very similar classes that are more database-friendly....Simplified versions look like this:...interface IMedia...
asked by Sam Nelson
How to use EF7 from VSCode in Mac?
I'm new to C# and I'm trying to connect to a DB preferably PostgreSQL (or do I must use MS SQL?). How do I do that in VSCode and Mac (using dnx CLI)?
asked by Tingan Ho
How can I update my project from System.runtime 4.0.10.0 to 4.0.20.0
I get this error when I build my project:...Severity Code Description Project File Line Error CS1705 Assembly 'EntityFramework.Core' with identity 'EntityFramework.Core, Version=7.0.0.0, Culture=neutral, PublicKeyToken=null' uses 'System.Ru...
asked by Elisabeth
How to get ConnectionString from EF7 DbContext
My Scenario:...I'm using EF7 for standard CRUD operations and Dapper for more complex queries that require increase in speed. From startup.cs I'm injecting my ...DbContext... into my DAL which does then obviously does the database queries. Dapper requires...
asked by Nick De Beer
"The expected lock file doesn't exist. Please run "dnu restore"" right after I have done so
I'm running beta7 for everything, including EF 7. I'm trying to connect to my remote existing database using the ASP.NET 5 Application template project. My project.json looks like this:...{ "webroot": "wwwroot", "userSecretsId": "aspnet5-XXX-409e9e37-...
asked by Antrim
How to setup multi tenancy in ASP.NET 5 Web API and Entity Framework 7?
I'm building a backend service using ASP.NET5's Web API & EF7 to setup a multi tenancy database structure. The requirements are as follows:...API endpoints are the same for all tenants,...each tenant has its own database containing tenant specific data,..
asked by maxmantz
ObjectMaterialized and SavingChanges events in Entity Framework 7?
ObjectMaterialized... and ...SavingChanges... were two very useful events in previous versions of Entity Framework. Those events actually belonged to the underlying ...ObjectContext... API, which no longer exists in Entity Framework 7....So what are the c...
asked by Cat Nap
Entity Framework 7 DbContext scaffold
I am trying to generate a ...DbContext... for an existing database structure using ASP.NET 5 and Entity Framework 7. Not surprisingly, there isn't a lot of documentation surrounding how to do this easily. Additionally, I want to scaffold ONLY the context;...
asked by awh112
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