Fix bug in fillable array

[jpdunc23]

This bug prevented the country_id and state_id fields from being
mass-assignable when updating a user.

[daftspunk]

Hmm, not quite. October's Model is slightly different to Laravel, If you set the relation to the primary identifier, it will populate the relation. So for example:

$user->country = 3;

// Is the same as
$user->country = Country::find(3);

// And subsequently should set this attribute also
$user->country_id = 3;

If this is a bug, please provide some example code where it doesn't work.

[jpdunc23]

I was trying to use the country_state partial of the account component on my front-end for users to update their account info (ended up using custom code for country and state dropdowns, as I think there might be an issue with the partial, or I'm using it wrong, see here: http://octobercms.com/forum/post/country-state-relation-doesnt-work-into-users-account-page). I followed the model you provide in the update partial. So something like this:

{{ form_ajax('onUpdate', { model: user }) }}

    <div class="form-group">
        <label for="accountName">Full Name</label>
        <input name="name" type="text" class="form-control" id="accountName" value="{{ form_value('name') }}">
    </div>

    <div class="form-group">
        <label for="accountEmail">Email</label>
        <input name="email" type="email" class="form-control" id="accountEmail" value="{{ form_value('email') }}">
    </div>

    <div class="form-group">
        <label for="accountPassword">New Password</label>
        <input name="password" type="password" class="form-control" id="accountPassword">
    </div>

    <div class="form-group">
        <label for="accountPasswordConfirm">Confirm New Password</label>
        <input name="password_confirmation" type="password" class="form-control" id="accountPasswordConfirm">
    </div>

    <div class="form-group">
        <label for="accountCountry">Country</label>
        <select name="country_id" id="accountCountry" class="form-control">
        {% for id, country in countries %}
            <option value="{{ id }}" {% if id == user.country_id %}selected{% endif %}>{{ country }}</option>
        {% endfor %}
        </select>
    </div>

    <button type="submit" class="btn btn-default">Save</button>

{{ form_close() }}

Before I changed country to country_id in the fillable array, that form would update everything but country_id in the database. The country_state partial also references country_id and state_id so I think it might have the same problem.