private Expression <Func <Post, bool> > TitleContains(IEnumerable <string> keywords)
{
var predicate = PredicateExtensions.Begin <Post>();
foreach (var keyword in keywords)
{
predicate = predicate.Or(TitleContains(keyword));
}
return(predicate);
}
public void Can_Begin_New_Expression()
{
var predicate = PredicateExtensions.Begin <string>(true);
Expression <Func <string, bool> > expectedOrExpression = str => (str == "A" || str.Contains("B"));
var expectedExpression = expectedOrExpression.ToString();
var orExpression = predicate.Or(_equalsA.Or(_containsB));
var resultExpression = orExpression.ToString();
resultExpression.Should().Be(expectedExpression);
LogResults(expectedExpression, resultExpression);
}
protected Expression <Func <TModel, bool> > ComposeBaseFilter <TModel>(BaseLogFilter filter) where TModel : BaseLogEntryDbModel
{
var exp = PredicateExtensions.Begin <TModel>();
if (filter.DateFrom.HasValue)
{
exp = PredicateExtensions.And <TModel>(exp, error => error.EventDate >= filter.DateFrom);
}
if (filter.DateTo.HasValue)
{
exp = PredicateExtensions.And <TModel>(exp, error => error.EventDate <= filter.DateTo);
}
return(exp);
}
/// <summary>
/// 获取供应商列表
/// </summary>
/// <param name="name"></param>
/// <param name="typeCode"></param>
/// <param name="pageIndex"></param>
/// <param name="pageSize"></param>
/// <returns></returns>
public List <Supplier> GetSupplier(string name, string typeCode, int pageIndex, int pageSize)
{
var predicate = PredicateExtensions.Begin <Supplier>(true);
if (string.IsNullOrEmpty(name))
{
predicate.And(s => s.SupplierName.Contains(name) || s.ShortName.Contains(name));
}
if (string.IsNullOrEmpty(typeCode))
{
predicate.And(s => s.SupplierType == typeCode);
}
if (pageSize > 0)
{
return(_supplierRepository.GetListAsync(predicate, s => s.Id, pageIndex, pageSize).Result);
}
else
{
return(_supplierRepository.GetListAsync(predicate).Result);
}
}
