public virtual IDtoMetadataBuilder <TDto> AddLookup <TLookupDto>(string memberName, string dataValueField, string?dataTextField, Expression <Func <TLookupDto, bool> >?baseFilter = null, string?lookupName = null)
where TLookupDto : class
{
if (memberName == null)
{
throw new ArgumentNullException(nameof(memberName));
}
if (dataValueField == null)
{
throw new ArgumentNullException(nameof(dataValueField));
}
if (_dtoMetadata == null)
{
throw new InvalidOperationException($"{nameof(AddDtoMetadata)} must be called first");
}
DtoMemberLookup lookup = new DtoMemberLookup
{
DtoMemberName = memberName,
DataTextField = dataTextField,
DataValueField = dataValueField,
LookupDtoType = typeof(TLookupDto).GetTypeInfo().FullName
};
if (baseFilter != null)
{
lookup.BaseFilter_JS = BuildLookupJsFilterFromLambdaExpression(baseFilter, lookup);
}
_dtoMetadata.MembersLookups.Add(lookup);
return(this);
}
protected virtual string BuildLookupJsFilterFromLambdaExpression <TLookupDto>(Expression <Func <TLookupDto, bool> > baseFilter, DtoMemberLookup lookup)
where TLookupDto : class
{
if (baseFilter == null)
{
throw new ArgumentNullException(nameof(baseFilter));
}
if (baseFilter.Parameters.ExtendedSingle("Finding base filter parameters").Name != "it")
{
throw new Exception("base filter's parameter name must be 'it'. For example it => it.Id == 1");
}
return(baseFilter.CompileToJavascript(JavascriptCompilationOptions));
}
