ColumnAlias support.

Templates/LinqToDB.ttinclude

@@ -8,9 +8,11 @@
 #>
 <#+
 Action BeforeGenerateLinqToDBModel = () => {};
-Action AfterGenerateLinqToDBModel = () => {};
+Action AfterGenerateLinqToDBModel  = () => {};
 
-bool GenerateObsoleteAttributeFoAliases;
+bool GenerateObsoleteAttributeForAliases;
+bool IsCompactColumns       = true;
+bool IsCompactColumnAliases = true;
 
 void GenerateTypesFromMetadata()
 {
@@ -57,7 +59,7 @@ void GenerateTypesFromMetadata()
 				new[] { t.DataContextPropertyName },
 				null);
 			
-			if (GenerateObsoleteAttributeFoAliases)
+			if (GenerateObsoleteAttributeForAliases)
 				aProp.Attributes.Add(new Attribute("Obsolete", "\"Use " + t.DataContextPropertyName + " instead.\""));
 
 			aliases.Members.Add(aProp);
@@ -94,9 +96,10 @@ void GenerateTypesFromMetadata()
 				aProp.Comment.AddRange(comments);
 		}
 
-		var columns     = new MemberGroup { IsCompact = true };
-		var nPKs        = t.Columns.Values.Count(c => c.IsPrimaryKey);
-		var allNullable = t.Columns.Values.All  (c => c.IsNullable || c.IsIdentity);
+		var columns       = new MemberGroup { IsCompact = IsCompactColumns };
+		var columnAliases = new MemberGroup { IsCompact = IsCompactColumnAliases, Region = "Alias members" };
+		var nPKs          = t.Columns.Values.Count(c => c.IsPrimaryKey);
+		var allNullable   = t.Columns.Values.All  (c => c.IsNullable || c.IsIdentity);
 
 		foreach (var c in t.Columns.Values)
 		{
@@ -163,14 +166,19 @@ void GenerateTypesFromMetadata()
 			else if (!c.IsIdentity)
 				c.Attributes.Add(new Attribute("NotNull"));
 
+			var columnComments = new List<string>();
+
 			if (!string.IsNullOrWhiteSpace(c.Description))
 			{
-				c.Comment.Add("/ <summary>");
+				columnComments.Add("/ <summary>");
 				foreach (var line in c.Description.Split('\n'))
-					c.Comment.Add("/ " + line.TrimEnd());
-				c.Comment.Add("/ </summary>");
+					columnComments.Add("/ " + line.TrimEnd());
+				columnComments.Add("/ </summary>");
 			}
 
+			if (columnComments.Count > 0)
+				c.Comment.AddRange(columnComments);
+
 			// End line comment.
 			//
 			c.EndLineComment = c.ColumnType;
@@ -179,10 +187,33 @@ void GenerateTypesFromMetadata()
 			SetPropertyValue(c, "IsEditable",  true);
 
 			columns.Members.Add(c);
+
+			// Alias.
+			//
+			if (c.AliasName != null && c.AliasName != c.MemberName)
+			{
+				var caProp = new Property(
+					c.Type,
+					c.AliasName,
+					new[] { c.MemberName },
+					new[] { c.MemberName + " = value;"});
+
+				caProp.Comment.AddRange(columnComments);
+
+				if (GenerateObsoleteAttributeForAliases)
+					caProp.Attributes.Add(new Attribute("Obsolete", "\"Use " + c.MemberName + " instead.\""));
+
+				caProp.Attributes.Add(new Attribute("ColumnAlias", "\"" + c.MemberName + "\""));
+
+				columnAliases.Members.Add(caProp);
+			}
 		}
 
 		t.Members.Add(columns);
 
+		if (columnAliases.Members.Count > 0)
+			t.Members.Add(columnAliases);
+
 		if (GenerateAssociations)
 		{
 			var keys = t.ForeignKeys.Values.ToList();
@@ -235,7 +266,7 @@ void GenerateTypesFromMetadata()
 			if (comments.Count > 0)
 				aClass.Comment.AddRange(comments);
 
-			if (GenerateObsoleteAttributeFoAliases)
+			if (GenerateObsoleteAttributeForAliases)
 				aClass.Attributes.Add(new Attribute("Obsolete", "\"Use " + t.TypeName + " instead.\""));
 
 			Model.Types.Add(aClass);