public async Task <PageResult <ProductViewModel> > GetAllByCategoryId(GetPublicProductPagingRequest request)
{
//1. Select join
var query = from p in _context.Products
join pt in _context.ProductTranslations on p.Id equals pt.ProductId
join pic in _context.ProductInCategories on p.Id equals pic.ProductId
join c in _context.Categories on pic.CategoryId equals c.Id
select new { p, pt, pic };
//2. Filter
if (request.CategoryId.HasValue && request.CategoryId.Value > 0)
{
query = query.Where(p => p.pic.CategoryId == request.CategoryId);
}
//3. Paging
int totalRow = await query.CountAsync();
var data = await query.Skip((request.PageIndex - 1) *request.PageSize)
.Take(request.PageSize)
.Select(x => new ProductViewModel()
{
Id = x.p.Id,
Name = x.pt.Name,
DateCreated = x.p.DateCreated,
Description = x.pt.Description,
Details = x.pt.Details,
LanguageId = x.pt.LanguageId,
OriginalPrice = x.p.OriginalPrice,
Price = x.p.Price,
SeoAlias = x.pt.SeoAlias,
SeoDescription = x.pt.SeoDescription,
SeoTitle = x.pt.SeoTitle,
Stock = x.p.Stock,
ViewCount = x.p.ViewCount
}).ToListAsync();
//4. Select and project
var pageResult = new PageResult <ProductViewModel>()
{
Items = data,
TotalRecord = totalRow
};
return(pageResult);
}
public Task <PagedResult <ProductViewModel> > GetAllPaging(GetPublicProductPagingRequest request)
{
throw new NotImplementedException();
}
PageResult <ProductViewModel> IPublicProductService.GetAllByCategoryId(GetPublicProductPagingRequest request)
{
throw new NotImplementedException();
}
public async Task <PagedResult <ProductViewModel> > GetAllByCategoryId(string languageId, GetPublicProductPagingRequest request)
{
//1. Query
var query = from p in _context.Products
join pt in _context.ProductTranslations on p.Id equals pt.ProductId
join pic in _context.ProductInCategories on p.Id equals pic.ProductId
join c in _context.Catergories on pic.CategoryId equals c.Id
where pt.LanguageId == languageId
select new { p, pt, pic };
//2. Filter
if (request.CategoryId.HasValue && request.CategoryId.Value > 0)
{
query = query.Where(x => x.pic.CategoryId == request.CategoryId);
}
//3. Paging
int totalRow = await query.CountAsync();
//VD muon lay trang 2 pageIndex = 2 thì Skip (2-1)*10 = 10 records và Take 10 record tiếp theo
var data = await query.Skip((request.PageIndex - 1) *request.PageSize) //ToListAsync thi phai sua lai await
.Take(request.PageSize)
.Select(x => new ProductViewModel()
{
Id = x.p.Id,
Name = x.pt.Name,
DateCreated = x.p.DateCreated,
Description = x.pt.Description,
Details = x.pt.Details,
LanguageId = x.pt.LanguageId,
OriginalPrice = x.p.OriginalPrice,
Price = x.p.Price,
SeoAlias = x.pt.SeoAlias,
SeoDescription = x.pt.SeoDescription,
SeoTitle = x.pt.SeoTitle,
Stock = x.p.Stock,
ViewCount = x.p.ViewCount
}).ToListAsync();
var pageResult = new PagedResult <ProductViewModel>()
{
TotalRecords = totalRow,
PageSize = request.PageSize,
PageIndex = request.PageIndex,
Items = data
};
return(pageResult);
}
public async Task <PagedResult <ProductVm> > GetAllByCategoryId(string languageId, GetPublicProductPagingRequest request) // lấy của public nhe
{
// bước 1 :select join
var query = from p in _context.Products
join pt in _context.ProductTranslations
on p.Id equals pt.ProductId
join pic in _context.ProductInCategories on p.Id equals pic.ProductId
join c in _context.Categories on pic.CategoryId equals c.Id
where pt.LanguageId == languageId
select new { p, pt, pic };
// bước 1: filter theo điều kiện
if (request.CategoryId.HasValue && request.CategoryId.Value > 0)// HasValue mặc đinh là true
{
//using System.linq
query = query.Where(p => p.pic.CategoryId == request.CategoryId);//một trong só nhữ thằng này thì mới được
}
// bước 3: paging
int totalRow = await query.CountAsync(); // lấy ra tông số số dòng để phân trang phải include using Microsoft.EntityFrameworkCore;
var data = await query.Skip((request.PageIndex - 1) *request.PageSize)
.Take(request.PageSize)// nếu PageIndex=2 và PageSize=20 thì bỏ qua 10 chỉ lấy 10 bẩn ghi hiện lên ko lấy tất để phù hợp với PageSize
.Select(x => new ProductVm()
{
Id = x.p.Id,
Name = x.pt.Name,
DateCreated = x.p.DateCreated,
Description = x.pt.Description,
Details = x.pt.Details,
LanguageId = x.pt.LanguageId,
OriginalPrice = x.p.OriginalPrice,
Price = x.p.Price,
SeoAlias = x.pt.SeoAlias,
SeoDescription = x.pt.SeoDescription,
SeoTitle = x.pt.SeoTitle,
Stock = x.p.Stock,
ViewCount = x.p.ViewCount,
}).ToListAsync(); // vì ta Async ở đây nên trên kia ta chỉ cần await để đẩy vào data là song nhớ là ToListAsync nha vì bên PageRsult Item ta để là list
// bước 4: selecet and Project
var pagedResult = new PagedResult <ProductVm>()
{
TotalRecords = totalRow,
PageSize = request.PageSize,
PageIndex = request.PageIndex,
Items = data
};
return(pagedResult);
}