[英]Linq with join need distinct rows by ID
I am getting multiple rows of combination.我得到多行组合。 I need Unique Vendor rows with unique VendorCod.
我需要具有唯一 VendorCod 的唯一供应商行。
Code:代码:
IQueryable<VendorModel> vendors = (from vendor in _context.Vendor
join vp in _context.VendorProduct on vendor.Pkid equals vp.VendorId
where vp.ProductId == ProductId
select new VendorModel()
{
VendorId = vendor.Pkid,
Name = vendor.Name,
VendorCode = vendor.VendorCode,
FacilityId = 0,
ClientId = 0,
Active = vendor.Active ?? false,
UpdatedAt = vendor.UpdatedAt,
DeletedAt = vendor.DeletedAt
});
You have many products for a vendors, so you have to apply appropriate predicate and no joins are needed.您有许多供应商的产品,因此您必须应用适当的谓词并且不需要连接。
Via navigation property:通过导航属性:
var vendors =
from vendor in _context.Vendor
where vendor.Products.Any(vp => vp.ProductId == ProductId)
select new VendorModel
{
VendorId = vendor.Pkid,
Name = vendor.Name,
VendorCode = vendor.VendorCode,
FacilityId = 0,
ClientId = 0,
Active = vendor.Active ?? false,
UpdatedAt = vendor.UpdatedAt,
DeletedAt = vendor.DeletedAt
};
Or if you do not have navigation property:或者,如果您没有导航属性:
var vendors =
from vendor in _context.Vendor
where _context.VendorProduct.Any(vp => vendor.Pkid == vp.VendorId && vp.ProductId == ProductId)
select new VendorModel
{
VendorId = vendor.Pkid,
Name = vendor.Name,
VendorCode = vendor.VendorCode,
FacilityId = 0,
ClientId = 0,
Active = vendor.Active ?? false,
UpdatedAt = vendor.UpdatedAt,
DeletedAt = vendor.DeletedAt
};
You will need to group your products and check if any match the code您需要对您的产品进行分组并检查是否与代码匹配
IQueryable<VendorModel> vendors = (from vendor in _context.Vendor
join vp in _context.VendorProduct on vendor.Pkid equals vp.VendorId into vpg
where vpg.Any(vp => vp.ProductId == ProductId)
select new VendorModel()
{
VendorId = vendor.Pkid,
Name = vendor.Name,
VendorCode = vendor.VendorCode,
FacilityId = 0,
ClientId = 0,
Active = vendor.Active ?? false,
UpdatedAt = vendor.UpdatedAt,
DeletedAt = vendor.DeletedAt
});
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