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我使用LINQ从多个表中查询数据。如何使Entity Framework Core在执行JOIN时查询一些字段
var test= await _context.Article
.Select(a => new
{
a.ID,
a.Title,
a.CreatedTime,
a.EditedTime,
a.Author.UserName,
a.AuthorID
}).ToListAsync();
Author
是Article
类导航属性。
但我得到这个从日志:
Executed DbCommand (6ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT [a].[ID], [a].[AuthorID], [a].[Content], [a].[CreatedTime], [a].[EditedTime], [a].[Title], [a.Author].[Id], [a.Author].[AccessFailedCount], [a.Author].[ConcurrencyStamp], [a.Author].[Email], [a.Author].[EmailConfirmed], [a.Author].[LockoutEnabled], [a.Author].[LockoutEnd], [a.Author].[NormalizedEmail], [a.Author].[NormalizedUserName], [a.Author].[PasswordHash], [a.Author].[PhoneNumber], [a.Author].[PhoneNumberConfirmed], [a.Author].[SecurityStamp], [a.Author].[TwoFactorEnabled], [a.Author].[UserName]
FROM [Article] AS [a]
LEFT JOIN [AspNetUsers] AS [a.Author] ON [a].[AuthorID] = [a.Author].[Id]
ORDER BY [a].[AuthorID]
我只是想一些领域,但它会查询所有的人。如果我从我的代码中删除a.Author.UserName
行,它只是按预期工作。
我错过了什么吗?
我正在使用实体框架核心1.1.0与Microsoft SQL Server。
很酷。现在“唯一”的问题是2.0.0何时到来,以及人们应该如何处理所有这些错误:) –