Skip map a destination field if source's field are unset

[tuanht]

Skip map a destination field if source's field are unset

Problem:

• In my Symfony project, when I map from model to entity, and persist my entity to DB. I don't need to define fields that not necessary in model. The problem are after map, entity's fields will be set to null if the same don't exists in model. So, database data are lost.
• skipNull option should not use in this situation. Because if fields in model are null, I want them to be update to entity.

Solution 1:

• Add option skipUnset. Then catch NoSuchPropertyException in map() function. $value will be set to null if skipUnset not used, otherwise continue the loop.

Solution 2:

• Skip unset property in buildDefaultMap() by default.
• In this solution, catch for NoSuchPropertyException MAY become unreach.

[tuanht]

I think this is a bug. So solution 2 must be implemented