QueryExpressionBuilder

commit 977b3bba95c6181be63a5729447f5a548353fe91
parent 3400be98ae7ae670646c7e501ca2f592fcbb4903
Author: novickii.sergei.nure@gmail.com <novickii.sergei.nure@gmail.com>
Date:   Mon,  1 Jul 2024 22:16:55 +0300

Fixed an error when creating a predicate from an empty filtering model. Now, if the filtering model is empty, the predicate will return all the elements of the collection.

Diffstat:
M
QueryExpressionBuilder/Attributes.cs
 | 
3
+--
M
QueryExpressionBuilder/ExpressionBuilder.cs
 | 
12
++++++++++++

2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/QueryExpressionBuilder/Attributes.cs b/QueryExpressionBuilder/Attributes.cs
@@ -4,8 +4,7 @@
     /// Attribute to filtration strings
     /// </summary>
     public class String
-    {
-        
+    {        
         /// <summary>
         /// Filtration func StartWith
         /// </summary>
diff --git a/QueryExpressionBuilder/ExpressionBuilder.cs b/QueryExpressionBuilder/ExpressionBuilder.cs
@@ -90,6 +90,18 @@ namespace QueryExpressionBuilder
                         prop.GetCustomAttribute<GreaterOrEqualAttribute>() != null || prop.GetCustomAttribute<StartWithAttribute>() != null || 
                         prop.GetCustomAttribute<ContainsAttribute>() != null || prop.GetCustomAttribute<EqualsAttribute>() != null).ToArray();
 
+            // Проверка, пустые ли все свойства query
+            bool allPropertiesNull = true;
+            for (int i = 0; i < T_pr_props.Length; i++)
+            {
+                if (T_pr_props[i].GetValue(query) != null)
+                {
+                    allPropertiesNull = false;
+                    break;
+                }
+            }
+            if (allPropertiesNull) return _ => true;
+
             //Проходимся по всем параметрам класса БД
             foreach (var p in typeof(TDB).GetProperties())
             {