drivers added SqlField::isNullColumn()

drivers/common/include/orm/drivers/sqlfield.hpp

@@ -101,7 +101,10 @@ namespace Orm::Drivers
         /*! Set the field QVariant value metatype (for invalid values only). */
         void setMetaType(QMetaType metaType);
 
-        /*! Determine whether a field is required. */
+        /*! Determine whether a field is SQL nullable (NULL in the table definition). */
+        inline bool isNullColumn() const noexcept;
+
+        /*! Determine whether a field is required (!NULL in the table definition). */
         inline bool isRequired() const noexcept;
         /*! Set the required field status. */
         inline void setRequired(bool required) noexcept;
@@ -251,6 +254,12 @@ namespace Orm::Drivers
         return m_metaType;
     }
 
+    bool SqlField::isNullColumn() const noexcept
+    {
+        // Very confusing, I can't do anything about it to have compatible API 😔
+        return m_requiredStatus == Optional;
+    }
+
     bool SqlField::isRequired() const noexcept
     {
         return m_requiredStatus == Required;

drivers/common/include/orm/drivers/sqlrecord.hpp

@@ -66,6 +66,11 @@ namespace Orm::Drivers
         /*! Set the value of the field with the field name to the given value. */
         void setValue(const QString &name, QVariant &&value);
 
+        /*! Determine whether a field is SQL nullable (NULL in the table definition). */
+        bool isNullColumn(size_type index) const;
+        /*! Determine whether a field is SQL nullable (NULL in the table definition). */
+        bool isNullColumn(const QString &name) const;
+
         /*! Determine whether the field at the given index is NULL. */
         bool isNull(size_type index) const;
         /*! Determine whether the field with the given field name is NULL. */

drivers/common/src/orm/drivers/sqlrecord.cpp

@@ -93,6 +93,19 @@ void SqlRecord::setValue(const QString &name, QVariant &&value)
     setValue(indexOf(name), std::move(value));
 }
 
+bool SqlRecord::isNullColumn(const size_type index) const
+{
+    // Throw the OutOfRangeError exception if the record doesn't contain an index
+    throwIfNotContains(index);
+
+    return m_fields[index].isNullColumn();
+}
+
+bool SqlRecord::isNullColumn(const QString &name) const
+{
+    return isNullColumn(indexOf(name));
+}
+
 bool SqlRecord::isNull(const size_type index) const
 {
     // Throw the OutOfRangeError exception if the record doesn't contain an index