ef-model-first

问题 Is there an easy way to make an ObjectContext public in debug mode and internal in release mode? With Linqpad it is very convenient to connect to an ObjectContext for quick testing and querying, so for development purposes I want it to be public. But I don't want to think of the consequences when the same convenience is deployed to some smart customer. 回答1: As mentioned in the comment, this may not be of any practical use, but: #if DEBUG public #endif class YourContext : ObjectContext { ... }

问题 Is there an easy way to make an ObjectContext public in debug mode and internal in release mode? With Linqpad it is very convenient to connect to an ObjectContext for quick testing and querying, so for development purposes I want it to be public. But I don't want to think of the consequences when the same convenience is deployed to some smart customer. 回答1: As mentioned in the comment, this may not be of any practical use, but: #if DEBUG public #endif class YourContext : ObjectContext { ... }

问题 This question is part of my following one I already asked roughly 2.5 years ago: Entity Framework (.NET) Round-Trip Modelling with Model First? I wanted to ask if in the meantime, the following is possible (and from which version of EF upwards): We are currently using EF 5.0 with the "Model First" approach (VS 2012). After first problems, we managed to configure the two T4 templates for generating the DbContext-derived class and the POCOs so that if we need to map a new (or existing) database

问题 Although I have marked my ID column with .Identity() , the generated database schema doesn't have IDENTITY set to true, which gives me problems when I'm adding records. If I manually edit the database schema (in SQL Management Studio) to have the Id column marked IDENTITY , everything works as I want it - I just can't make EF do that by itself. This is my complete mapping: public class EntryConfiguration : EntityConfiguration<Entry> { public EntryConfiguration() { Property(e => e.Id)

问题 I've created a database model with model-first method using Entity Framework 4.0. I then created an sql script using the Generate Database from Model... I've also created an SQL Server Database file in my App_Data folder. How do I now run the SQL file against this MDF file? I'm using Visual Studio 2010. 回答1: I ran into this same problem and here is what worked for me. When I selected "Generate Database from Model..." I created a new MDF file. This process worked fine and Visual Studio

问题 I created a model in the edm designer (VS10) using "DbContext Entity Generator" as the generation item. In the generated DbContext subclass, it overrode the constructor so I can't use it in the other partial class: public EntitiesContainer() : base("name=EntitiesContainer") { this.Configuration.LazyLoadingEnabled = false; } What's the proper way of initialize a database with model-first? 回答1: You could alter the T4 template that's being used for generating the DbContxt class. Then you could

问题 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

问题 I like the option of doing model first design with the Entity Framework (4). However, I haven't been able to find out how to add an additional index to a table besides the primary key. Is this possible in the visual designer? Or do you need to add an index manually after creating the database (which would be a shortcoming of the designer)? 回答1: Read this article. Section Influencing the DDL Generation . HTH 来源： https://stackoverflow.com/questions/3333674/add-index-in-ef-model-first-design

问题 I create some classes using Model First, EF4x as you can see a similar example in this answer from algreat. My question is about the default comments that are generate as it shows in the block-quote below //------------------------------------------------------------------------------ // <auto-generated> // This code was generated from a template. // // Manual changes to this file may cause unexpected behavior in your application. // Manual changes to this file will be overwritten if the code

问题 I need to connect a system to oracle using entity model first. I have a model with the entity "Entity1". "MyBool", as the name says, it's a boolean property. I sucessfully generated the sql script from the model and run it on oracle database. Then I have this code: static void Main(string[] args) { Model1Container context = new Model1Container(); Entity1 entity = context.Entity1.FirstOrDefault(); } This code throws this exception: Schema specified is not valid. Errors: Model1.msl(8,12) :