Fix whitespaces.

Author: SebastianStehle

backend/src/Squidex.Data.EntityFramework/Providers/Postgres/PostgresDialect.cs

@@ -53,9 +53,12 @@ public override string OrderBy(PropertyPath path, SortOrder order, bool isJson)
 
     public override string WhereMatch(PropertyPath path, string query, SqlParams queryParameters)
     {
-        var searchTerm = query.Replace(" ", " & ", StringComparison.Ordinal);
+        if (query.Contains(' ', StringComparison.OrdinalIgnoreCase))
+        {
+            query = query.Replace(" ", " & ", StringComparison.Ordinal);
+        }
 
-        return $"to_tsvector('simple', {FormatField(path, false)}) @@ to_tsquery({queryParameters.AddPositional(searchTerm)})";
+        return $"to_tsvector('simple', {FormatField(path, false)}) @@ to_tsquery({queryParameters.AddPositional(query)})";
     }
 
     public override string Where(PropertyPath path, CompareOperator op, ClrValue value, SqlParams queryParameters, bool isJson)

backend/src/Squidex.Data.EntityFramework/Providers/SqlServer/SqlServerDialect.cs

@@ -75,6 +75,11 @@ public override string OrderBy(PropertyPath path, SortOrder order, bool isJson)
 
     public override string WhereMatch(PropertyPath path, string query, SqlParams queryParameters)
     {
+        if (query.Contains(' ', StringComparison.OrdinalIgnoreCase))
+        {
+            query = $"\"{query}\"";
+        }
+
         return $"CONTAINS({FormatField(path, false)}, {queryParameters.AddPositional(query)})";
     }
 

backend/tests/Squidex.Data.Tests/EntityFramework/Infrastructure/Queries/EFQueryTests.cs

@@ -510,6 +510,21 @@ public async Task Should_query_full_text()
         Assert.Equal(20, dbResult.Count);
     }
 
+    [Fact]
+    public async Task Should_query_full_text_with_space()
+    {
+        var builder =
+            new TestSqlBuilder(fixture.Dialect, "TestEntity")
+                .WhereMatch("FullText", "hello world");
+
+        var (sql, parameters) = builder.Compile();
+
+        var dbContext = await CreateAndPrepareDbContextAsync();
+        var dbResult = await PollAsync(dbContext, sql, parameters, 0);
+
+        Assert.Empty(dbResult);
+    }
+
     private static long[] Range(int from, int to)
     {
         var result = new List<long>();