Add serialize tests for WHERE

include/sqlpp11/core/clause/where.h

@@ -131,10 +131,7 @@ namespace sqlpp
   };
 
   template <typename Expression>
-  using check_where_t = typename check_where<Expression>::type;
+  using check_where_t = typename check_where<remove_dynamic_t<Expression>>::type;
-
-  template <typename Expression>
-  using check_where_static_t = check_where_t<Expression>;
 
   // NO WHERE YET
   template <bool WhereRequired>
@@ -170,9 +167,9 @@ namespace sqlpp
 
       template <typename Expression>
       auto where(Expression expression) const
-          -> _new_statement_t<check_where_static_t<Expression>, where_t<Expression>>
+          -> _new_statement_t<check_where_t<Expression>, where_t<Expression>>
       {
-        using Check = check_where_static_t<Expression>;
+        using Check = check_where_t<Expression>;
         return _where_impl(Check{}, expression);
       }
 
@@ -197,6 +194,16 @@ namespace sqlpp
     return  " WHERE " + to_sql_string(context, t._expression);
   }
 
+  template <typename Context, typename Expression>
+  auto to_sql_string(Context& context, const where_data_t<dynamic_t<Expression>>& t) -> std::string
+  {
+    if (t._expression._condition)
+    {
+      return " WHERE " + to_sql_string(context, t._expression._expr);
+    }
+    return "";
+  }
+
   template <typename Context>
   auto to_sql_string(Context& , const where_data_t<unconditional_t>&) -> std::string
   {

tests/core/serialize/clause/CMakeLists.txt

@@ -38,4 +38,5 @@ create_test(insert_set)
 create_test(select_columns)
 create_test(select_flags)
 create_test(update_set)
+create_test(where)
 

tests/core/serialize/clause/where.cpp

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2024, Roland Bock
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "Sample.h"
+#include "../compare.h"
+#include <sqlpp11/sqlpp11.h>
+
+int main(int, char* [])
+{
+  const auto val = sqlpp::value(17);
+  const auto expr = sqlpp::value(17) + 4;
+
+  const auto foo = test::TabFoo{};
+
+  // Without condition.
+  SQLPP_COMPARE(sqlpp::unconditionally(), "");
+  SQLPP_COMPARE(sqlpp::where(true), " WHERE 1");
+
+  // Whith static condition.
+  SQLPP_COMPARE(sqlpp::where(foo.boolN), " WHERE tab_foo.bool_n");
+  SQLPP_COMPARE(sqlpp::where(foo.boolN.is_not_distinct_from(true)), " WHERE tab_foo.bool_n IS NOT DISTINCT FROM 1");
+  SQLPP_COMPARE(sqlpp::where(foo.id > 17), " WHERE tab_foo.id > 17");
+
+  // With dynamic condition.
+  SQLPP_COMPARE(sqlpp::where(dynamic(true, foo.id > 17)), " WHERE tab_foo.id > 17");
+  SQLPP_COMPARE(sqlpp::where(dynamic(false, foo.id > 17)), "");
+
+  return 0;
+}