Databases
StackOverflow2013
Postsdbo
POc# Lambda Expression built with LinqKit does not compile
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POc# Lambda Expression built with LinqKit does not compile
    primarykey
    data
    text
    <p>This lambda does not compile, but I do not understand why. </p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Linq.Expressions; using LinqKit; namespace ConsoleApplication2 { class Program { static void Main(string[] args) { var barModel = new BarModel(); string id = "some"; Console.WriteLine(barModel.subFor(id).ToString()); // output: m =&gt; (True AndAlso (m.key == value(ConsoleApplication2.Bar`1+&lt;&gt;c__DisplayClass0[ConsoleApplication2.Model]).id)) Console.ReadKey(); var subworkitems = barModel.list.Where(barModel.subFor(id).Compile()); // Exception {"variable 'm' of type 'ConsoleApplication2.Model' referenced from scope '', but it is not defined"} Console.WriteLine(subworkitems.ToString()); Console.ReadKey(); } } class Bar&lt;TModel&gt; { public Bar(Expression&lt;Func&lt;TModel, string&gt;&gt; foreignKeyExpression) { _foreignKeyExpression = foreignKeyExpression; } private Expression&lt;Func&lt;TModel, string&gt;&gt; _foreignKeyExpression { get; set; } public Expression&lt;Func&lt;TModel, bool&gt;&gt; subFor(string id) { var ex = forTargetId(id); return ex; } public Expression&lt;Func&lt;TModel, bool&gt;&gt; forTargetId(String id) { var fc = _foreignKeyExpression; Expression&lt;Func&lt;TModel, bool&gt;&gt; predicate = m =&gt; true; var result = predicate.And(m =&gt; fc.Invoke(m) == id).Expand(); return result; } } class Model { public string key; public string value; } class BarModel : Bar&lt;Model&gt; { public List&lt;Model&gt; list; public BarModel() : base(m =&gt; m.key) { list = new List&lt;Model&gt;(); } } } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMichael Mrozek
    1. USFrank Michael Kraft
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POc# Lambda Expression built with LinqKit does not compile
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POc# Lambda Expression built with LinqKit does not compile
      1. USPittsburgh DBA
      1. VTFavorite
    1. COCan you supply the error details?
      singulars
      1. POc# Lambda Expression built with LinqKit does not compile
      1. USCallum Rogers
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload