public Task <TEntity> GetFirstOrDefaultAsync(QueryableExpressionSpecification <TEntity> specification = null,
bool disableTracking = true)
{
var query = GetQuery(disableTracking, specification);
return(specification?.OrderBy?.Invoke(query).FirstOrDefaultAsync() ?? query.FirstOrDefaultAsync());
}
public Task <TResult> GetFirstOrDefaultAsync <TResult>(Expression <Func <TEntity, TResult> > selector,
QueryableExpressionSpecification <TEntity> specification = null,
bool disableTracking = true)
{
var query = GetQuery(disableTracking, specification);
return(specification?.OrderBy != null
? specification.OrderBy(query).Select(selector).FirstOrDefaultAsync()
: query.Select(selector).FirstOrDefaultAsync());
}
public IPagedList <TEntity> GetPagedList(QueryableExpressionSpecification <TEntity> specification = null,
int pageIndex = 0,
int pageSize = 20,
bool disableTracking = true)
{
var query = GetQuery(disableTracking, specification);
return(specification?.OrderBy?.Invoke(query).ToPagedList(pageIndex, pageSize) ??
query.ToPagedList(pageIndex, pageSize));
}
public IPagedList <TResult> GetPagedList <TResult>(Expression <Func <TEntity, TResult> > selector,
QueryableExpressionSpecification <TEntity> specification = null,
int pageIndex = 0,
int pageSize = 20,
bool disableTracking = true)
where TResult : class
{
var query = GetQuery(disableTracking, specification);
return(specification?.OrderBy?.Invoke(query).Select(selector).ToPagedList(pageIndex, pageSize) ??
query.Select(selector).ToPagedList(pageIndex, pageSize));
}
public Task <IPagedList <TEntity> > GetPagedListAsync(
QueryableExpressionSpecification <TEntity> specification = null,
int pageIndex = 0,
int pageSize = 20,
bool disableTracking = true,
CancellationToken cancellationToken = default(CancellationToken))
{
var query = GetQuery(disableTracking, specification);
return(specification?.OrderBy?.Invoke(query).ToPagedListAsync(pageIndex, pageSize, 0, cancellationToken) ??
query.ToPagedListAsync(pageIndex, pageSize, 0, cancellationToken));
}
public Task <IPagedList <TResult> > GetPagedListAsync <TResult>(Expression <Func <TEntity, TResult> > selector,
QueryableExpressionSpecification <TEntity> specification = null,
int pageIndex = 0,
int pageSize = 20,
bool disableTracking = true,
CancellationToken cancellationToken = default(CancellationToken))
where TResult : class
{
var query = GetQuery(disableTracking, specification);
return(specification?.OrderBy?.Invoke(query).Select(selector)
.ToPagedListAsync(pageIndex, pageSize, 0, cancellationToken) ?? query.Select(selector)
.ToPagedListAsync(pageIndex, pageSize, 0, cancellationToken));
}
public static Func <IQueryable <TEntity>, IOrderedQueryable <TEntity> > GetOrderByExpression <TEntity>(
QueryableExpressionSpecification <TEntity> leftExpressionSpecification,
QueryableExpressionSpecification <TEntity> rightExpressionSpecification)
{
var isLeftExpressionSpecificationOrderByDefined = leftExpressionSpecification.OrderBy != null;
var isRightExpressionSpecificationOrderByDefined = rightExpressionSpecification.OrderBy != null;
if (isLeftExpressionSpecificationOrderByDefined && isRightExpressionSpecificationOrderByDefined)
{
throw new SpecificationOrderByException(
"Cannot have two different order by for the joint specification");
}
if (isLeftExpressionSpecificationOrderByDefined)
{
return(leftExpressionSpecification.OrderBy);
}
return(isRightExpressionSpecificationOrderByDefined ? rightExpressionSpecification.OrderBy : null);
}
private IQueryable <TEntity> GetQuery(bool disableTracking,
QueryableExpressionSpecification <TEntity> specification = null)
{
IQueryable <TEntity> query = DbSet;
if (disableTracking)
{
query = query.AsNoTracking();
}
var includeData = specification?.Include <IIncludableQueryable <TEntity, object> >();
if (includeData != null)
{
query = includeData(query);
}
if (specification?.ToExpression() != null)
{
query = query.Where(specification.ToExpression());
}
return(query);
}
public AndExpressionSpecification(QueryableExpressionSpecification <TEntity> leftExpressionSpecification,
QueryableExpressionSpecification <TEntity> rightExpressionSpecification)
{
_rightExpressionSpecification = rightExpressionSpecification;
_leftExpressionSpecification = leftExpressionSpecification;
}
public static Func <IQueryable <TEntity>, IOrderedQueryable <TEntity> > GetOrderByExpression <TEntity>(
QueryableExpressionSpecification <TEntity> expressionSpecification) => expressionSpecification.OrderBy;
public NotExpressionSpecification(QueryableExpressionSpecification <TEntity> expressionSpecification) =>
