ASP.NET WEB API Odata 라이브러리를 사용하고 있습니다. 내 호출에서 substringof를 사용하고 값이 null이면 실패합니다.Asp.net 웹 API 하위 문자열 null 문제
... odata/MyEntity()?$filter=substringof(null,Name)
... 그리고 그 결과는 다음과 같습니다 :
내가 지나가는 오전 URI는
<?xml version="1.0" encoding="utf-8"?>
<m:error xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<m:code />
<m:message xml:lang="en-US">The query specified in the URI is not valid.</m:message>
<m:innererror>
<m:message>The 'substringof' function cannot be applied to an enumeration-typed argument.</m:message>
<m:type>Microsoft.Data.OData.ODataException</m:type>
<m:stacktrace> at System.Web.Http.OData.Query.Expressions.FilterBinder.ValidateAllStringArguments(String functionName, Expression[] arguments)
at System.Web.Http.OData.Query.Expressions.FilterBinder.BindSubstringOf(SingleValueFunctionCallNode node)
at System.Web.Http.OData.Query.Expressions.FilterBinder.BindSingleValueFunctionCallNode(SingleValueFunctionCallNode node)
at System.Web.Http.OData.Query.Expressions.FilterBinder.Bind(QueryNode node)
at System.Web.Http.OData.Query.Expressions.FilterBinder.BindFilterClause(FilterClause filterClause, Type filterType)
at System.Web.Http.OData.Query.Expressions.FilterBinder.Bind(FilterClause filterClause, Type filterType, IEdmModel model, IAssembliesResolver assembliesResolver, ODataQuerySettings querySettings)
at System.Web.Http.OData.Query.FilterQueryOption.ApplyTo(IQueryable query, ODataQuerySettings querySettings, IAssembliesResolver assembliesResolver)
at System.Web.Http.OData.Query.ODataQueryOptions.ApplyTo(IQueryable query, ODataQuerySettings querySettings)
at System.Web.Http.QueryableAttribute.ApplyQuery(IQueryable queryable, ODataQueryOptions queryOptions)
at System.Web.Http.QueryableAttribute.ExecuteQuery(IEnumerable query, HttpRequestMessage request, HttpActionDescriptor actionDescriptor)
at System.Web.Http.QueryableAttribute.OnActionExecuted(HttpActionExecutedContext actionExecutedContext)</m:stacktrace>
</m:innererror>
</m:error>
그래서는 웹 API 중 하나로, OData 라이브러리에 문제가 보인다
. 그것을 막을 수있는 방법이 있습니까?