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RelationShip

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c# - EF Code-First 一对一关系 : Multiplicity is not valid in Role * in relationship

我正在尝试执行以下操作:publicclassclass1{publicintId{get;set;}[ForeignKey("Class2")]publicintClass2Id{get;set;}publicvirtualClass2Class2{get;set;}}publicclassclass2{publicintId{get;set;}[Required]publicvirtualintClass1Id{get;set;}[Required][ForeignKey("Class1Id")]publicClass1Class1{get;set;}}然而,每次我尝试迁移我的数据

c# - 指定的架构无效。错误 : The relationship was not loaded because the type is not available

我希望在我的Order模型中引用OrderAddress模型两次;一次作为ShippingAddress,一次作为BillingAdress。另一方面,我希望我的OrderAddress模型有一个OrderAddresses列表。OrderAddress模型publicenumAddressType{Billing,Shipping,Contact}publicclassOrderAddress:BaseModel{publicAddressTypeAddressType{get;set;}publicboolIsPrimary{get;set;}publicstringAddress

c# - 指定的架构无效。错误 : The relationship was not loaded because the type is not available

我希望在我的Order模型中引用OrderAddress模型两次;一次作为ShippingAddress,一次作为BillingAdress。另一方面,我希望我的OrderAddress模型有一个OrderAddresses列表。OrderAddress模型publicenumAddressType{Billing,Shipping,Contact}publicclassOrderAddress:BaseModel{publicAddressTypeAddressType{get;set;}publicboolIsPrimary{get;set;}publicstringAddress

c# - Entity Framework : A referential integrity constraint violation on many to many relationship

嘿,我有一个带有大量进程内缓存和EntityFramework的应用程序。当我想对实体进行更新时,我会重新附加缓存的副本。我跟踪在上下文的生命周期中附加的所有内容,因此我不会尝试附加它们两次。我在附加时发生了一个错误(在大多数情况下很少见,这工作正常并且非常快),它说了以下内容:Areferentialintegrityconstraintviolationoccurred:Thepropertyvaluesthatdefinethereferentialconstraintsarenotconsistentbetweenprincipalanddependentobjectsinth

c# - Entity Framework : A referential integrity constraint violation on many to many relationship

嘿,我有一个带有大量进程内缓存和EntityFramework的应用程序。当我想对实体进行更新时,我会重新附加缓存的副本。我跟踪在上下文的生命周期中附加的所有内容,因此我不会尝试附加它们两次。我在附加时发生了一个错误(在大多数情况下很少见,这工作正常并且非常快),它说了以下内容:Areferentialintegrityconstraintviolationoccurred:Thepropertyvaluesthatdefinethereferentialconstraintsarenotconsistentbetweenprincipalanddependentobjectsinth

c# - 关联的主体端在 1 :1 relationship in Entity framework 中意味着什么

publicclassFoo{publicstringFooId{get;set;}publicBooBoo{get;set;}}publicclassBoo{publicstringBooId{get;set;}publicFooFoo{get;set;}}当我收到错误时,我正试图在EntityFramework中执行此操作:Unabletodeterminetheprincipalendofanassociationbetweenthetypes'ConsoleApplication5.Boo'and'ConsoleApplication5.Foo'.Theprincipalend

c# - 关联的主体端在 1 :1 relationship in Entity framework 中意味着什么

publicclassFoo{publicstringFooId{get;set;}publicBooBoo{get;set;}}publicclassBoo{publicstringBooId{get;set;}publicFooFoo{get;set;}}当我收到错误时,我正试图在EntityFramework中执行此操作:Unabletodeterminetheprincipalendofanassociationbetweenthetypes'ConsoleApplication5.Boo'and'ConsoleApplication5.Foo'.Theprincipalend

php - 无法让 Laravel 同事工作

我不太确定我是否理解associateLaravel中的方法。我理解这个想法,但我似乎无法让它发挥作用。使用这个(蒸馏的)代码:classUser{publicfunctioncustomer(){return$this->hasOne('Customer');}}classCustomer{publicfunctionuser(){return$this->belongsTo('User');}}$user=newUser($data);$customer=newCustomer($customerData);$user->customer()->associate($custome

php - 无法让 Laravel 同事工作

我不太确定我是否理解associateLaravel中的方法。我理解这个想法,但我似乎无法让它发挥作用。使用这个(蒸馏的)代码:classUser{publicfunctioncustomer(){return$this->hasOne('Customer');}}classCustomer{publicfunctionuser(){return$this->belongsTo('User');}}$user=newUser($data);$customer=newCustomer($customerData);$user->customer()->associate($custome

php - Doctrine 2 - 多对一关系的外键不允许空值

我的一个实体中有ManyToOne关系,如下所示:classLicense{//.../***Customerwhoownsthelicense**@var\ISE\LicenseManagerBundle\Entity\Customer*@ORM\ManyToOne(targetEntity="Customer",inversedBy="licenses")*@ORM\JoinColumn(name="customer_id",referencedColumnName="id")*/private$customer;//...}classCustomer{//.../***Licen