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support for method calls on string, this would help database drivers like mongo or even other database that have a string collation that is case sensitive.

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This commit is contained in:
David Lebee
2021-04-27 12:51:29 -04:00
parent e7a3b0692e
commit 15aeb2a1a1
2 changed files with 90 additions and 3 deletions
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PoweredSoft.DynamicLinq/Helpers/QueryableHelpers.cs
+26 -3
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@@ -3,6 +3,7 @@ using PoweredSoft.DynamicLinq.Parser;
using PoweredSoft.DynamicLinq.Resolver;
using System;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
@@ -471,8 +472,18 @@ namespace PoweredSoft.DynamicLinq.Helpers
var partStr = parts.First();
var isLast = parts.Count == 1;
// the member expression.
var memberExpression = Expression.PropertyOrField(current, partStr);
Expression memberExpression;
if (current != null && current.Type == typeof(string) && partStr.Contains("()"))
{
var finalMethodName = partStr.Replace("()", string.Empty);
var callingMethod = GetStringCallingMethod(finalMethodName); //typeof(string).GetMethod(finalMethodName, new Type[0]);
memberExpression = Expression.Call(current, callingMethod);
}
else
{
// the member expression.
memberExpression = Expression.PropertyOrField(current, partStr);
}
// TODO : maybe support that last part is collection but what do we do?
// not supported yet.
@@ -535,7 +546,19 @@ namespace PoweredSoft.DynamicLinq.Helpers
}
}
public static Expression InAndNotIn(ParameterExpression parameter, ConditionOperators condition, object value, QueryConvertStrategy convertStrategy, MemberExpression memberExpression)
private static ConcurrentDictionary<string, MethodInfo> _stringMethodCache = new ConcurrentDictionary<string, MethodInfo>();
private static MethodInfo GetStringCallingMethod(string methodName)
{
if (methodName == null)
throw new ArgumentNullException(nameof(methodName));
return _stringMethodCache.GetOrAdd(methodName, mn =>
{
return typeof(string).GetMethod(mn, new Type[0]);
});
}
public static Expression InAndNotIn(ParameterExpression parameter, ConditionOperators condition, object value, QueryConvertStrategy convertStrategy, Expression memberExpression)
{
var enumerableValue = value as IEnumerable;
if (enumerableValue == null)