Allow opting out of applying Editor's LeftJoins.

Author: VictorioBerra

DataTables-Editor-Server/SearchBuilderOptions.cs

@@ -23,6 +23,7 @@ public class SearchBuilderOptions
         private Action<Query> _where;
         private string _order;
         private List<LeftJoin> _leftJoin = new List<LeftJoin>();
+        private bool _applyEditorLeftJoins = true;
         private Dictionary<string, string> _fromEnum = new Dictionary<string, string>();
 
         /// <summary>
@@ -180,6 +181,18 @@ public SearchBuilderOptions LeftJoin(string table, string field1, string op, str
             return this;
         }
 
+        /// <summary>
+        /// Choose not to apply the LeftJoins that were also applied to the wider Editor instance to the SearchBuilder select
+        /// </summary>
+        /// <param name="applyEditorLeftJoins">Apply global LeftJoins.</param>
+        /// <returns>Self for chaining</returns>
+        public SearchBuilderOptions ApplyEditorLeftJoins(bool applyEditorLeftJoins = true)
+        {
+            _applyEditorLeftJoins = applyEditorLeftJoins;
+
+            return this;
+        }
+
         /// <summary>
         /// Set an enum that will be used to apply items to the SearchBuilder select
         /// </summary>
@@ -237,7 +250,7 @@ internal List<Dictionary<string, object>> Exec(Field fieldIn, Editor editor, Lis
                 return str;
             });
 
-            if(leftJoinIn.Count() > 0){
+            if(leftJoinIn.Count() > 0 && _applyEditorLeftJoins){
                 this._leftJoin = leftJoinIn;
             }