Maintaining an alias for the new EmComponent.db_engine

The EmField version cannot be tested yet (drop column not yet implemented for sqlite in Database.sqlalter)

Passe tous les tests

Now _fields and table MUST be class attribute.
Its important to note that _fields now consist in a list of (name, ftype) tuples and that ftype is a EmFieldType class and NOT an EmFieldType instance

- Now except for the modify_rank tests test_component didn't fails
- Added simple integer operation capabilities to EmFieldType_integer ( int cast, +=, -=, *=, /=, +, -, *, /, %, ...)

EmComponent.create() now takes keywords arguments corresponding to the _fields property of the calling class

WARNING !!! Hardcoded rank = -1 at component creation and Hardcoded 0 as default value for EmClass icon

Correction du bloc de mcommentaire de class encore sous l'ancien modèle.

remplacement des self.id restant par self.uid

Now EmComponent is populate if it's instanciated with a name or an id

Pass the value of ranked_in instaed of the column name.

same as precedent

test si new_rank - 1 existe pour signe '='

En cas de signe égale prend désormais en charge une valeur de new_rank superieur ou inferieur a la valeur actuelle.

En plus de modifié la valeur en base, modifie la valeur d'instance.

Prise en compte du nom de la collonne indiqué par ranked_in

Fonction new_rank dans component. Permet la modification d'un rank tout en gardant la collection de component valide.

The dates are set in EmComponent::create() for date_create and in EmComponent::save() for date_update
The values are sets to datetime.datetime.utcnow() so we now that EVERY date in the db are in UTC, no matter django, database or even server configurations.
We will have to take care to convert dates from database to django timezone in dates fieldtypes.

Added a classmethod EmComponent::newUid() that determines the caller's class and return a newly registrated UID

SQL calls are in _populateDb , _saveDb and _createDb methods (exception for component::delete() )

Removed logging test in EditorialModel/lib/component.py
Added comment in Database/sqlwrapper.py

Test functions name as tests files name must begin with test in order to be run by manage.py test

Created the class Lodel.utils.mlstring.MlString needed by EditorialModel.lib.component.EmComponent
The first test pass ! =)

Lodel/sttings/__init__.py wasn't able to import files when called by manage.py
Renaming em to EditorialModel and moved Em* objects to EditorialModel/lib
Adding a first test (that do not pass because of syntax errors in Em* classes)