var advocacy = (from c in svcContext.CreateQuery("lead")
join a in svcContext.CreateQuery("product")
on c["transactioncurrencyid"] equals a["transactioncurrencyid"]
where a["capg_billingtimeframe"].Equals(126350000)
select new
{
dues = c["capg_calculatedduesbilling"],
product = c["capg_primaryproduct"],
listprice = a["price"],
eligibility = c.FormattedValues["capg_eligibility"]
});
That is my linq query and it is giving me the error: Invalid 'where' condition. An entity member is invoking an invalid property or method.
I have looked online everywhere and done their suggestions. I am not using Xrm.cs because late binding can be faster. I have tried using the == operand and I have tried doing (int) and Convert.ToInt32(a["capg_billingtimeframe"]) and even converting everything to a string. I will say that a["capg_billingtimeframe"] I know is an object (that's why I did those conversions.
I'm guessing by that integer that capg_billingtimeframe is an optionset. If it is, you need to cast it like this:
where ((OptionSetValue)a["capg_billingtimeframe"]).Value == 126350000
I used early bound and for getting the local I wrote:
OptionSetValue branch = this.InputTargetEntity.Attributes.Contains("capg_calculatorutilized") ? (OptionSetValue)this.InputTargetEntity["capg_calculatorutilized"] : (OptionSetValue)this.TargetPreImage["capg_calculatorutilized"];
I then had to get the Optionsets.cs using crmsvcutil and writing:
if (branch.Value == (int)capg_calculatorrequired.SectionA)
Works like a charm.
Related
I am trying to build a simple Count function in F# 3.0 with OrmLite which looks like this :
let x =
use conn = dbFactory.Open() //IDbConnection
conn.Count<Area>(fun (x:Area) -> x.parent_id.GetValueOrDefault(0) > 0)
where
type Area() =
//...
member val parent_id = Nullable<_>() with get, set
But I get the error :
System.InvalidOperationException: variable 'x' of type 'FSI_0029.Area' referenced from scope '', but it is not defined
The following works :
let x =
use conn = dbFactory.Open()
conn.Count<Area>(fun (x:Area) -> x.id > 0)
So I assume it has to do with the Nullable<_> type.
Has anyone encountered this issue ?
Many thanks in advance,
Typically the functions associated with the member variable needs to be mapped in the Sql builder(for Expressions); for example string's ToUpper() function is mapped internally to sql's UPPER() function. Since the Sql Builder does not know what is GetValueOrDefault (as this function is not mapped to any SQL function) , it is erroring out. I'm not sure what SQL statement can be used for this, if you have a valid case for it, please create a ticket in the Github.
I suspect I'm missing something rather basic, yet I can't figure this one out.
I'm running a simple linq query -
var result = from UserLine u in context.Users
where u.PartitionKey == provider.Value && u.RowKey == id.Value
select u;
UserLine user = null;
try
{
user = result.FirstOrDefault();
}
For some reason this produces a TargetInvocationException with an inner exception of NullReferenceException.
This happens when the linq query produces no results, but I was under the impression that FirstOrDefault would return Default<T> rather than throw an exception?
I don't know if it matters, but the UserLine class inherits from Microsoft.WindowsAzure.StorageClient.TableServiceEntity
there are two possible reasons:
provider.Value
id.Value
Are you sure that theese nullables have value. You might want to check HasValue before
var result = from UserLine u in context.Users
where (provider.HasValue && u.PartitionKey == provider.Value)
&& (id.HasValue && u.RowKey == id.Value)
select u;
UserLine user = null;
try
{
user = result.FirstOrDefault();
}
I thought it produced a different error, but based on the situation in which the problem is occurring you might want to look to check if context.IgnoreResourceNotFoundException is set to false? If it is try setting it to true.
This property is a flag to indicate whether you want the storage library to throw and error when you use both PartitionKey and RowKey in a query and no result is found (it makes sense when you think about what the underlying REST API is doing, but it's a little confusing when you're using LINQ)
I figured it out - the problem occured when either id or provider had '/' in the value, which the id did. when I removed it the code ran fine
Understanding the Table Service Data Model has a section on 'Characters Disallowed in Key Fields' -
The following characters are not allowed in values for the
PartitionKey and RowKey properties:
The forward slash (/) character
The backslash () character
The number sign (#) character
The question mark (?) character
Here's some fun try putting the where query the other way around like this to see if it works (I heard a while ago it does!):
where (id.HasValue && u.RowKey == id.Value) && (provider.HasValue && u.PartitionKey == provider.Value)
Other than this you can now set IgnoreResourceNotFoundException = true in the TableServiceContext to receive null when an entity is not found instead of the error.
It's a crazy Azure storage thing.
i'm trying to get an error description according to error Id:
String errorDesc = from resultCodesTableRow in resultCodesDT.AsEnumerable()
where resultCodesTableRow.Field<int>("Error_Code_Column_Name") == errorCode
select resultCodesTableRow.Field<string>("Error_Desc_Column_Name").ToString();
why do i get the error:
"Cannot implicitly convert type 'System.Data.EnumerableRowCollection' to 'string'" ?
how does the query supposed to look ?
Change
resultCodesDT.AsEnumerable() to resultCodesDT.rows
Does this work:
where (int)resultCodesTableRow.GetItem("Error_Code_Column_Name") == errorCode
select resultCodesTableRow.GetItem("Error_Desc_Column_Name")
I am not pretty sure what the actual LINQ query is returning most probably by seeing it and as you said you are getting error it might be returning a Collection so in order to avoid use first or last method to the query ie
String errorDesc = from resultCodesTableRow in resultCodesDT.AsEnumerable()
where resultCodesTableRow.Field("Error_Code_Column_Name") == errorCode
select resultCodesTableRow.Field("Error_Desc_Column_Name").First().ToString();
the Select function in your statement will return an IEnumerable.
instead you need to use something like
String errorDesc = (from resultCodesTableRow in resultCodesDT.AsEnumerable()
where resultCodesTableRow.Field<int>("Error_Code_Column_Name") == errorCode
select resultCodesTableRow.Field<string>("Error_Desc_Column_Name").ToString()).First();
or maybe this would work but is untested
String errorDesc = resultCodesDT.Where(X=> x.Error_Code_Column_Name==errorCode)
.Select(s=>s.Error_Desc_Column_Name.toString()).First();
I'm trying to use an already existing Expression building class that I made when trying to do a select clause, but I'm not sure how to attach the expression to the expression tree for the Select, I tried doing the following:
var catalogs = matchingCatalogs.Select(c => new
{
c.CatalogID,
Name = EntitiesExpressionHelper.MakeTranslationExpression<Catalog>("Name", ApplicationContext.Instance.CurrentLanguageID).Compile().Invoke(c),
CategoryName = EntitiesExpressionHelper.MakeTranslationExpression<Category>("Name", ApplicationContext.Instance.CurrentLanguageID).Compile().Invoke(c.Category),
c.CategoryID,
c.StartDateUTC,
c.EndDateUTC
});
But I obviously get the error stating that the Entity Framework can't map Invoke to a SQL method. Is there a way to work around this?
FYI, EntitiesExpressionHelper.MakeTranslationExpression<T>(string name, int languageID) is equivalent to:
x => x.Translations.Count(t => t.LanguageID == languageID) == 0 ? x.Translations.Count() > 0 ? x.Translations.FirstOrDefault().Name : "" : x.Translations.FirstOrDefault(t => t.LanguageID == languageID).Name
EDIT: I realize that I need to use an ExpressionVisitor to accomplish this, but I'm not sure how to use an ExpressionVisitor to alter the MemberInitExpression, so if anyone knows how to accomplish this, let me know.
You need to capture the expressions in vars. You won't be able to use anonymous types. The general idea is that this works:
Expression<Func<Foo, Bar>> exp = GenExpression();
var q = matchingCatalogs.Select(exp);
But this will not:
var q = matchingCatalogs.Select(GenExpression());
The first happily passes the result of GenExpression to L2E. The second tries to pass GenExpression itself to L2E, rather than the result.
So you need a reference to a var of the same type as the expression. Those can't be implicitly typed, so you'll need a real type for your result type.
I'm trying to wrap my head around linq -> nhib
I have a simple bit of sql that i'm trying to get working in nhibernate.linq
select * from
ColModel where ColModel.DataIndex
not in ('CostElement1', 'CostElement2', 'CostElement3')
and ColModel.ReportId = 1
The list of excluded DataIndex values comes in in the form of a List<string> called excludeNames
Here is what I have tried but it seems that it's not really feeling the love:
var s = base._sessionManager.OpenSession();
var query = from col in s.Linq<ColModel>()
where col.Report.Id == reportid &&
!(from c in s.Linq<ColModel>() select c.DataIndex).Contains(excludeNames)
select col;
return query.ToList();
the error:
The type arguments for method 'System.Linq.Enumerable.Contains<TSource>(System.Collections.Generic.IEnumerable<TSource>, TSource)' cannot be inferred from the usage. Try specifying the type arguments explicitly.
I'm pretty sure I'm borfing this from the offset so any pointers would be well appreciated :)
w://
Contains doesn't accept a list.
There are ways to work around this in LINQ, but I'm not sure which, if any, of those will work in NH Linq
I think you have your exclusion backwards.
s = base._sessionManager.OpenSession();
var query = from col in s.Linq<ColModel>()
where col.Report.Id == reportid &&
!excludeNames.Contains(col.DataIndex)
select col;
return query.ToList();
Collection.Contains(item) will produce the SQL item in (...collection...), adding the negation will get you what you want.