A bug occurred in get_one, solved in this change.

Cast to ObjectId is not needed in pymongo backend

Add Simplified Chinese and Traditional Chinese translations

Fixing jinja2 error in admin/lib.html

UndefinedError: the inline if-expression on line 79 in 'admin/lib.html' evaluated to false and no else section was defined.

Fixed issue where some required fields would not be properly validated at the form level

- Using newer wtf.validators.DataRequired, old one is going to be deprecated

HTML fix: use javascript:void(0) instead of # so page doesn't jump

added persian language

make bulk deletes go through `delete_model`

I'm not sure this is ideal (might hide some errors?) but it's the easiest way
to use the hook for both kinds of delete.

Proposition for translation : updating french translation

Translation less literale.
Model-> objet (!=modèle)
Submit->Proposer (!=Proposé)

Model -> objet (!= modèle)
Submit -> Proposer (instead of Proposé)

Fix for performance issue when calculating total row count for paging

Fix for a performance issue when getting the total row count when implementing paging. When dealing with about 250.000 rows, it was taking about 30 secs to show one page on the first load. With this modifications it executes almost instantly.

The problem was that the query applying .count() to the current query generated the SQL:

SELECT count(*) AS count_1
FROM ( SELECT ModelView-columns FROM ModelView-table WHERE conditions ) as anon_1;

which made it actually get all the data in the inner query for then counting the rows and returning the amount. With this modification, the generated query is:

SELECT count(*) AS count_1
FROM ModelView-table
WHERE conditions;

that executes instantly.