需要帮助来确定“包含”和“然后包含”的问题

Question

我正在寻求帮助，以识别和解决与我的代码中使用 Include 和 ThenInclude 语句相关的问题。具体来说，我在处理这些陈述时遇到了困难，非常感谢任何见解或指导。

// Load all pump types along with their pumps.
var allpumpTypes = hydraulicOptionsContext.PumpTypeVariants
    .Include(pt => pt.PumpVariantCollection)
        .ThenInclude(pv => pv.Manufacturer.PumpVariants)
    .Include(pt => pt.OptionCircuitTypeCollection)
        .ThenInclude(oct => oct.OptionPropertiesCollection)
    .Include(pt => pt.OptionCircuitTypeCollection)
        .ThenInclude(oct => oct.PumpTypeCollection)
    .Include(pt => pt.OptionCircuitTypeCollection)
        .ThenInclude(oct => oct.Option.CircuitTypeCollection)
    .Include(pt => pt.OptionCircuitTypeCollection)
        .ThenInclude(oct => oct.Option.OptionName)
    .Include(pt => pt.OptionCircuitTypeCollection)
        .ThenInclude(oct => oct.Option.Specification)
    .Include(pt => pt.OptionPropertiesCollection)
        .ThenInclude(opc => opc.OptionCircuitType)
            .ThenInclude(oct => oct.Option)
    .Include(pt => pt.OptionPropertiesCollection)
        .ThenInclude(opc => opc.OptionCircuitType)
            .ThenInclude(oct => oct.PumpTypeCollection)
    .AsSplitQuery()
    .AsNoTracking();

这似乎是 Include 和 ThenInclude 语句中循环关系的潜在问题，我不知道循环问题在哪里。你能帮我找到它吗？

我试图审查代码逻辑：检查 Include 和 ThenInclude 语句的目的以了解它们的预期功能并检查数据库模式：确认数据库模式中实体和导航属性之间的关系与 Include 和 ThenInclude 语句一致。

Answer 1

不同的是Include引用的是原表（

PumpTypeVariants

），不管它放在链中的什么位置，而ThenInclude引用的是最后一个包含的表

您将

OptionPropertiesCollection

包括在

OptionCircuitTypeCollection

和

PumpTypeVariants

下。也许最后两个 Includes 应该是 ThenIncludes 下

OptionPropertiesCollection

？