EntityFramework-加上检查数据是否实现接口

Question

我有一个过滤器

 this.Filter<BaseModel>(q => q.Where(x => x.CompanyId == companyId);

有没有办法检查 "x" 正在实现我的自定义接口 "IGlobalDatabaseObject"？

 this.Filter<BaseModel>(q => q.Where(x => x.CompanyId == companyId || x is IGlobalDatabaseObject ); ?

因此，数据库查询将 return 数据 "x.CompanyId== companyId" 或者如果该数据实现全局接口

我正在使用 Ef plus 库 (github.com/zzzprojects/EntityFramework-Plus )

Answer 1

我想你正在寻找 EF+ 查询过滤器 Enable/Disable 功能。在你的情况下，是这样的：

// The key identifying your filter
var key = new object();

// Create filter for classes that inherit BaseModel
this.Filter<BaseModel>(key, q => q.Where(x => x.CompanyId == companyId));

// Disable the filter for classes that implement IGlobalDatabaseObject
this.Filter<IGlobalDatabaseObject>(key).Disable();