use existing result error in query_builder_exception constructor

include/matador/query/insert_query_builder.hpp

@@ -198,10 +198,9 @@ public:
       }
 
       if (obj.is_transient()) {
-        const auto result = processor.build(obj, true);
+        auto result = processor.build(obj, true);
         if (!result) {
-          throw query_builder_exception(error_code::InvalidObject, "Invalid object");
-          // return utils::failure(result.err());
+          throw query_builder_exception(result.release_error());
         }
       }
 
@@ -306,10 +305,9 @@ private:
 
     insert_step_processor<PointerType> processor{ctx_};
 
-    const auto result = processor.build(obj);
+    auto result = processor.build(obj);
     if (!result) {
-      throw query_builder_exception(error_code::InvalidObject, "Invalid object");
-      // return utils::failure(result.err());
+      throw query_builder_exception(result.release_error());
     }
   }
 
@@ -330,16 +328,16 @@ private:
 
     const auto it = ctx_.schema_.find(std::string{id});
     if (it == ctx_.schema_.end()) {
-      throw query_builder_exception(error_code::UnknownType, "Unknown type");
+      throw query_builder_exception(error_code::UnknownType, "Unknown type for relation " + std::string{id});
     }
 
     if (std::type_index(typeid(LocalType)) != it->second.node().info().type_index()) {
-      throw query_builder_exception(error_code::InvalidRelationType, "Invalid relation type");
+      throw query_builder_exception(error_code::InvalidRelationType, "Invalid relation type for " + std::string{id});
     }
 
     const auto cit = ctx_.contexts_by_type_.find(it->second.node().info().type_index());
     if (cit == ctx_.contexts_by_type_.end()) {
-      throw query_builder_exception(error_code::UnknownType, "Unknown type");
+      throw query_builder_exception(error_code::UnknownType, "No query contexts for type " + it->second.node().name());
     }
 
     std::ignore = ctx_.processing_many_to_many_relations_.insert(key);
@@ -351,11 +349,10 @@ private:
       }
 
       if (obj.is_transient()) {
-        const auto result = processor.build(obj, true);
+        auto result = processor.build(obj, true);
         if (!result) {
-          throw query_builder_exception(error_code::InvalidObject, "Invalid object");
-          // return utils::failure(result.err());
-        }
+          throw query_builder_exception(result.release_error());
+        };
       }
 
       auto rel = make_relation(obj);

include/matador/query/query_builder_exception.hpp

@@ -11,7 +11,8 @@ namespace matador::query {
 
 class query_builder_exception final : public std::exception {
 public:
-  explicit query_builder_exception(error_code error, std::string &&msg);
+  explicit query_builder_exception(utils::error &&err);
+  query_builder_exception(error_code error, std::string &&msg);
 
   [[nodiscard]] const utils::error &error() const;