Adding a virtual field that is processed by converters and by extract()

[Eric Risler]

It is possible to add a user defined field to a map/entity that does not exist in the table database but is processed by the extract() method and any registered converters?

Example:

I have a location entity that I wish to add a service_date field too. This field is not in the database. Its value is calculated based on other field values:

Location (entity):

- I add a custom getter called getServiceDate() that returns a timestamp after performing calculations based on other entity fields.

LocationMap (map):

- initialize()

   - call $this->addField('service_date', 'timestamp');

- getSelectFields()

  - call unset($fields['service_date']); so the field is not used in database queries.

Outcome:

- If I call $entity->extract(), the custom getter is not called.

[Grégoire Hubert]

Good catch !

I open a github issue.

--
Grégoire HUBERT
Pomm : http://www.pomm-project.org

[Grégoire Hubert]

Calling addField() is not necessary here since it defines the default
values for getSelectFields().

[Eric Risler]

I realize that if I call addField() that the field is included in the getSelectFields(). I don't want this of course, but I do want my custom field to be included in extract() calls on the entity. I tried calling addVirtualField() but the field was not included in extract() either.

ER

[Grégoire Hubert]

Yes, addField() and addVirtualField() do manage the default projection
of the mapper accordingly with the converter system. The problem here
is how entities dump out their data.

A discussion is open about this: https://github.com/chanmix51/Pomm/issues/129

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