ef-code-first

问题 In my project we have a branch model that has a separate development branch and has a separate branch for each release. It may look like this: dev ______ ______ / \ / \ master --+---+----+---+---+----+----+--- (...) r1 \______/ r2 \_______/ So we develop on dev merge it to master and then we create a release branch (r1, r2, ...). We want to use EF 6 (manual not automatic) migrations but we have a question that we don't know how to answer. Imagine this: dev _(1)__ ____(4) / \ / \ master --+---

问题 In my project we have a branch model that has a separate development branch and has a separate branch for each release. It may look like this: dev ______ ______ / \ / \ master --+---+----+---+---+----+----+--- (...) r1 \______/ r2 \_______/ So we develop on dev merge it to master and then we create a release branch (r1, r2, ...). We want to use EF 6 (manual not automatic) migrations but we have a question that we don't know how to answer. Imagine this: dev _(1)__ ____(4) / \ / \ master --+---

问题 I have a DbContext with several of the following type of members: public DbSet<JobLevel> JobLevels { get; set; } public DbSet<Country> Countries { get; set; } public DbSet<Race> Races { get; set; } public DbSet<Language> Languages { get; set; } public DbSet<Title> Titles { get; set; } All these are where T: IdNamePairBase , which has Id and Name members only. I am trying desperately to find a common interface with which to access any of these members, to generalise the following MVC3

问题 I'm having an odd issue with EF 4.1 Code First where even though I have configured an entity to generate columns for its inherited properties, it still joins to the inherited type's table. Here are my classes: public class Human { public int Id { get; set; } public string Name { get; set; } } public class SuperHuman : Human { public int Id { get; set; } public string Powers { get; set; } } public class MarvelDbContext : DbContext { public DbSet<Human> Humans { get; set; } public DbSet

问题 I'm having an odd issue with EF 4.1 Code First where even though I have configured an entity to generate columns for its inherited properties, it still joins to the inherited type's table. Here are my classes: public class Human { public int Id { get; set; } public string Name { get; set; } } public class SuperHuman : Human { public int Id { get; set; } public string Powers { get; set; } } public class MarvelDbContext : DbContext { public DbSet<Human> Humans { get; set; } public DbSet

问题 I have two POCO classes public class Order { int id; string code; int? quotationId; //it is foreign key public int Id{get;set;} public string Code{get;set;} public int? QuotationId{get;set;} Quotation quotation; public virtual Quotation Quotation { get; set; } .... } public class Quotation { int Id; string Code; public int Id{get;set;} public string Code{get;set;} Order order; public virtual Order Order { get; set; } .... } each Order may made from one or zero quotation, and each quotation

问题 I have two POCO classes public class Order { int id; string code; int? quotationId; //it is foreign key public int Id{get;set;} public string Code{get;set;} public int? QuotationId{get;set;} Quotation quotation; public virtual Quotation Quotation { get; set; } .... } public class Quotation { int Id; string Code; public int Id{get;set;} public string Code{get;set;} Order order; public virtual Order Order { get; set; } .... } each Order may made from one or zero quotation, and each quotation

问题 How do I get the following relationship to only generate the FK in Entity2? public class Entity1 { public int Id { get; set; } public virtual Entity2 Entity2 { get; set; } } public class Entity2 { public int Id { get; set; } public int? Entity1Id { get; set; } public virtual Entity1 Entity1 { get; set; } } I want Entity1 be able to get a reference to an Entity2 (have EF lazy load it), but I don't want Entity1 to have an FK to Entity2 in the db, I just want Entity2 to have an FK to Entity1. Is

问题 For example, with the following classes public class Child { public Guid Id { get; set; } public String Description { get; set; } public double Value { get; set; } public Child() { Id = Guid.NewGuid(); } } public class Parent { public Guid Id { get; set; } public String Name { get; set; } public virtual IList<Child> Children { get; set; } public Parent() { Id = Guid.NewGuid(); Children = new List<Child>(); } } And context public class TempContext : DbContext { public DbSet<Child> Children {

问题 I have two entities: Municipality and RoadSemgents. Municipality is parent and RoadSegments is a child table. I need to have two foreign Keys in RoadSegments from the same table (Municipality). public class Municipality { [Key] public int ID { get; set; } public string Name { get; set; } } public class RoadSegments { [Key] public int ID { get; set; } //ForeignKeys public int CodeMunicipalityLeft_ID { get; set; } public int CodeMunicipalityRight_ID { get; set; } [ForeignKey(