Fix presenter creation

[oelmekki]

Configuration page allows presenter / maintainer creation directly from web interface :

This is not working for me.

• the first time I used it, it created an unconfirmed account without giving any message on web interface
• the second time I tried (after deleting previous created account), it threw an exception :

ActiveRecord::RecordNotUnique (PG::UniqueViolation: ERROR:  duplicate key value violates unique constraint "presenters_pkey"
DETAIL:  Key (id)=(4) already exists.

An other exception is thrown when reloading the page, after removing account from database.

Fixing

I suppose the first time, a confirmation email should have been sent. We need a mail catcher to ensure this.

For the exception, the problem seems to be there is no dependent: destroy on Account#has_one :presenter.

Enhancing

After submitting the form, a message should be displayed to let us know what now :

To be adapted depending on what should actually happens when this form is completed.

Needs #12

[dboissier]

ok for me