实体框架复杂类型在一个模型中的多个实例? [英] Entity framework complex type multiple instances in one model?
问题描述
有没有办法让复杂的类型相同的模型内部的多个实例使用流利的API模型构建工具?
公共类联系
{
公众诠释编号{获得;组; }
公共字符串名字{获得;组; }
公共字符串名字{获得;组; }
公共广播PersonalAddress {获得;组; }
公共广播BusinessAddress {获得;组; }
}
公共类地址
{
公共字符串街{获得;组; }
公共字符串市{获得;组; }
公共字符串邮政code {获得;组; }
}
保护覆盖无效OnModelCreating(DbModelBuilder模型构建器)
{
base.OnModelCreating(模型构建器);
modelBuilder.Configurations.Add(新ContactConfiguration());
modelBuilder.Configurations.Add(新AddressConfiguration());
}
=============================================== ===================================
公共类AddressConfiguration:ComplexTypeConfiguration<地址>
{
公共AddressConfiguration()
{
//道具
this.Property(T => t.Street)
.IsOptional()
.HasColumnName(AddressStreet)
.HasMaxLength(1024);
this.Property(T => t.Postal code)
.IsOptional()
.HasColumnName(AddressPostal code)
.HasMaxLength(64);
this.Property(T => t.City)
.IsOptional()
.HasColumnName(AddressCity)
.HasMaxLength(512);
}
}
修改(找到了解决办法)
如果多个复杂类型的类的实例在同一CF模型中使用,这些类的配置设置在CF模型级是这样的:
公共类ContactConfiguration:EntityTypeConfiguration<联系与GT;
{
公共ContactConfiguration()
{
//道具解决复杂类型的类PersonalAddress实例
this.Property(T => t.PersonalAddress.Address.Street)
.HasColumnName(PersonalAddressStreet);
this.Property(T => t.PersonalAddress.Address.Postal code)
.HasColumnName(PersonalAddressPostal code);
this.Property(T => t.PersonalAddress.Address.City)
.HasColumnName(PersonalAddressCity);
//道具解决复杂类型的类BusinessAddress实例
this.Property(T => t.BusinessAddress.Address.Street)
.HasColumnName(BusinessAddressStreet);
this.Property(T => t.BusinessAddress.Address.Postal code)
.HasColumnName(BusinessAddressPostal code);
this.Property(T => t.BusinessAddress.Address.City)
.HasColumnName(BusinessAddressCity);
}
}
通过EF 6,$ C C首先$当您使用相同的复杂类型的多个实例,如<将preFIX列名与您的属性名/ P>
PersonalAddress_Street
BusinessAddress_Street
...
等。你只需要映射旧版本的EF。映射选项还可以让你的东西更好替换这些自动生成的名字。
另外,我不认为这是正确的配置code根据您的模型(错字也许?):
this.Property(T =&GT; t.PersonalAddress.Address.Street)
// 应该
this.Property(T =&GT; t.PersonalAddress.Street)
Is there a way to have multiple instances of complex type inside the same model using Fluent api model builder?
public class Contact
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public Address PersonalAddress { get; set; }
public Address BusinessAddress { get; set; }
}
public class Address
{
public string Street{ get; set; }
public string City{ get; set; }
public string PostalCode{ get; set; }
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Configurations.Add(new ContactConfiguration());
modelBuilder.Configurations.Add(new AddressConfiguration());
}
==================================================================================
public class AddressConfiguration : ComplexTypeConfiguration<Address>
{
public AddressConfiguration()
{
//props
this.Property(t => t.Street)
.IsOptional()
.HasColumnName("AddressStreet")
.HasMaxLength(1024);
this.Property(t => t.PostalCode)
.IsOptional()
.HasColumnName("AddressPostalCode")
.HasMaxLength(64);
this.Property(t => t.City)
.IsOptional()
.HasColumnName("AddressCity")
.HasMaxLength(512);
}
}
EDIT (FOUND THE SOLUTION)
If multiple complex type class instances are used in same CF Model, configuration of these classes is set at CF Model level like this:
public class ContactConfiguration : EntityTypeConfiguration<Contact>
{
public ContactConfiguration()
{
//props for PersonalAddress instance of Address complex type class
this.Property(t => t.PersonalAddress.Address.Street)
.HasColumnName("PersonalAddressStreet");
this.Property(t => t.PersonalAddress.Address.PostalCode)
.HasColumnName("PersonalAddressPostalCode");
this.Property(t => t.PersonalAddress.Address.City)
.HasColumnName("PersonalAddressCity");
//props for BusinessAddress instance of Address complex type class
this.Property(t => t.BusinessAddress.Address.Street)
.HasColumnName("BusinessAddressStreet");
this.Property(t => t.BusinessAddress.Address.PostalCode)
.HasColumnName("BusinessAddressPostalCode");
this.Property(t => t.BusinessAddress.Address.City)
.HasColumnName("BusinessAddressCity");
}
}
With EF 6, Code First will prefix the column names with your Property name when you use multiple instances of same complex type, like
PersonalAddress_Street
BusinessAddress_Street
...
and so on. You only need the mappings older versions of EF. The mapping option also allows you to replace these autogenerated names with something nicer.
Also, I don't think this is the correct configuration code based on your models (typo maybe?):
this.Property(t => t.PersonalAddress.Address.Street)
// should be
this.Property(t => t.PersonalAddress.Street)
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