实体框架Linq查询：如何在多个导航属性上从何处选择并从第三个导航属性中选择

Question

我有以下模型，在Entity Framework Core中设置了nav propertiers：

• CRMLocations（一对多）CRMPeoples
• CRMPeoples（一对多）CRME邮件
• CRMPeoples（一对多）CRMPhones

我有以下工作查询：

        var iqable = _crmDbContext.CRMPeoples
            .Where(p =>
                p.Name.ToLower().Contains(query) ||
                (from e in p.CRMEmails where e.EmailAddress.ToLower().Contains(query) select e).Any() ||
                (from h in p.CRMPhones where h.PhoneNumberNormalized.Contains(query) select h).Any())
            .Select(p => new CRMSearchResultDTO()
            {
                PersonName = p.Name,
                LocationName = p.CRMLocations.Name,
            });

如何替换“（从where where select）.Any（）”语句来使用Linq的lambda语法？必须导致1个SQL语句。可以使用左外连接或嵌套选择。

Answer 1

var iqable = _crmDbContext.CRMPeoples
        .Where(p =>
            p.Name.ToLower().Contains(query) ||
            p.CRMEmails.Where(e => e.EmailAddress.ToLower().Contains(query)).Any() ||
            p.CRMPhones.Where(h => h.PhoneNumberNormalized.Contains(query)).Any())
        .Select(p => new CRMSearchResultDTO()
        {
            PersonName = p.Name,
            LocationName = p.CRMLocations.Name,
        });

我使用ReSharper的命令“将LINQ转换为方法链”获得此代码