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Merge branch 'master' into Removing-unused-directives

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This commit is contained in:
Hemant Kumar Dundigalla
2018-11-19 16:32:04 +00:00
parent 6299d5ccc7 04530db118
commit 218c832583
10 changed files with 114 additions and 46 deletions
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46
src/Infrastructure/Data/EfRepository.cs
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@@ -20,6 +20,10 @@ namespace Microsoft.eShopWeb.Infrastructure.Data
{
_dbContext = dbContext;
}
private IQueryable<T> ApplySpecification(ISpecification<T> spec)
{
return SpecificationEvaluator<T>.GetQuery(_dbContext.Set<T>().AsQueryable(), spec);
}
public virtual T GetById(int id)
{
@@ -42,44 +46,26 @@ namespace Microsoft.eShopWeb.Infrastructure.Data
return _dbContext.Set<T>().AsEnumerable();
}
public async Task<List<T>> ListAllAsync()
public async Task<IReadOnlyList<T>> ListAllAsync()
{
return await _dbContext.Set<T>().ToListAsync();
}
public IEnumerable<T> List(ISpecification<T> spec)
{
// fetch a Queryable that includes all expression-based includes
var queryableResultWithIncludes = spec.Includes
.Aggregate(_dbContext.Set<T>().AsQueryable(),
(current, include) => current.Include(include));
// modify the IQueryable to include any string-based include statements
var secondaryResult = spec.IncludeStrings
.Aggregate(queryableResultWithIncludes,
(current, include) => current.Include(include));
// return the result of the query using the specification's criteria expression
return secondaryResult
.Where(spec.Criteria)
.AsEnumerable();
return ApplySpecification(spec).AsEnumerable();
}
public async Task<List<T>> ListAsync(ISpecification<T> spec)
public async Task<IReadOnlyList<T>> ListAsync(ISpecification<T> spec)
{
// fetch a Queryable that includes all expression-based includes
var queryableResultWithIncludes = spec.Includes
.Aggregate(_dbContext.Set<T>().AsQueryable(),
(current, include) => current.Include(include));
// modify the IQueryable to include any string-based include statements
var secondaryResult = spec.IncludeStrings
.Aggregate(queryableResultWithIncludes,
(current, include) => current.Include(include));
// return the result of the query using the specification's criteria expression
return await secondaryResult
.Where(spec.Criteria)
.ToListAsync();
return await ApplySpecification(spec).ToListAsync();
}
public int Count(ISpecification<T> spec)
{
return ApplySpecification(spec).Count();
}
public async Task<int> CountAsync(ISpecification<T> spec)
{
return await ApplySpecification(spec).CountAsync();
}
public T Add(T entity)

44
src/Infrastructure/Data/SpecificationEvaluator.cs Normal file
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@@ -0,0 +1,44 @@
using Microsoft.EntityFrameworkCore;
using Microsoft.eShopWeb.ApplicationCore.Entities;
using Microsoft.eShopWeb.ApplicationCore.Interfaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Microsoft.eShopWeb.Infrastructure.Data
{
public class SpecificationEvaluator<T> where T : BaseEntity
{
public static IQueryable<T> GetQuery(IQueryable<T> inputQuery, ISpecification<T> specification)
{
var query = inputQuery;
// modify the IQueryable using the specification's criteria expression
if (specification.Criteria != null)
query = query.Where(specification.Criteria);
// Includes all expression-based includes
query = specification.Includes.Aggregate(query,
(current, include) => current.Include(include));
// Include any string-based include statements
query = specification.IncludeStrings.Aggregate(query,
(current, include) => current.Include(include));
// Apply ordering if expressions are set
if (specification.OrderBy != null)
query = query.OrderBy(specification.OrderBy);
else if (specification.OrderByDescending != null)
query = query.OrderByDescending(specification.OrderByDescending);
// Apply paging if enabled
if (specification.isPagingEnabled)
{
query = query.Skip(specification.Skip)
.Take(specification.Take);
}
return query;
}
}
}