fix: Only apply .ToLower on properties that are strings

examples/controller/Dtos/UserDto.cs

@@ -16,4 +16,6 @@ public record UserDto
     public string UserName { get; set; } = string.Empty;
 
     public string Gender { get; set; } = string.Empty;
+
+    public int Age { get; set; }
 }

examples/controller/Entities/User.cs

@@ -23,4 +23,7 @@ public record User
 
     [Column("PersonSex", TypeName = "varchar(32)")]
     public string Gender { get; set; } = string.Empty;
+
+    [Column("Age", TypeName = "integer")]
+    public int Age { get; set; }
 }

examples/controller/Program.cs

@@ -48,7 +48,8 @@
                 .RuleFor(x => x.AvatarUrl, f => f.Internet.Avatar())
                 .RuleFor(x => x.UserName, f => f.Person.UserName)
                 .RuleFor(x => x.Gender, f => f.Person.Gender.ToString())
-                .RuleFor(x => x.IsDeleted, f => f.Random.Bool());
+                .RuleFor(x => x.IsDeleted, f => f.Random.Bool())
+                .RuleFor(x => x.Age, f => f.Random.Number(1, 10));
 
             context.Users.AddRange(users.Generate(1_000));
             context.SaveChanges();

src/Extensions/QueryableExtension.cs

@@ -59,14 +59,20 @@ public static (IQueryable, int?) Apply<T>(this IQueryable<T> queryable, Query qu
                 {
                     where.Append($"{property}.{_filterOperations[operand]}({value})");
                 }
-                else
+                else if (typeof(T).GetProperties().FirstOrDefault(x => x.Name.Equals(property, StringComparison.OrdinalIgnoreCase))?.PropertyType == typeof(string))
                 {
                     where.Append($"{property}.ToLower() {_filterOperations[operand]} {value}.ToLower()");
                 }
+                else if (typeof(T).GetProperties().FirstOrDefault(x => x.Name.Equals(property, StringComparison.OrdinalIgnoreCase))?.PropertyType == typeof(Guid))
+                {
+                    where.Append($"{property}{_filterOperations[operand]} Guid({value})");
+                }
+                else
+                {
+                    where.Append($"{property} {_filterOperations[operand]} {value}");
+                }
             }
 
-            Console.WriteLine(where.ToString());
-
             result = result.Where(where.ToString());
         }
 

tests/TestDbContext.cs

@@ -14,6 +14,7 @@ public record User
 
     [Column("PersonSex", TypeName = "varchar(32)")]
     public string Gender { get; set; } = string.Empty;
+    public int Age { get; set; }
 }
 
 

tests/Tests.cs

@@ -380,4 +380,30 @@ public void Test_QueryWithFilterCustomColumnName()
 
         Assert.Equal(expectedSql, sql);
     }
+
+    [Fact]
+    public void Test_QueryWithFilterGuidEquals()
+    {
+        var query = new Query() { Filter = "id eq '7ac156a2-f938-43cb-8652-8b14a8b471de'" };
+
+        var (result, _) = _context.Users.AsQueryable().Apply(query, null);
+        var sql = result.ToQueryString();
+
+        var expectedSql = _context.Users.AsQueryable().Where(x => x.Id == new Guid("7ac156a2-f938-43cb-8652-8b14a8b471de")).ToQueryString();
+
+        Assert.Equal(expectedSql, sql);
+    }
+
+    [Fact]
+    public void Test_QueryWithFilterIntegerEquals()
+    {
+        var query = new Query() { Filter = "age eq 4" };
+
+        var (result, _) = _context.Users.AsQueryable().Apply(query, null);
+        var sql = result.ToQueryString();
+
+        var expectedSql = _context.Users.AsQueryable().Where(x => x.Age == 4).ToQueryString();
+
+        Assert.Equal(expectedSql, sql);
+    }
 }