def checkouts_checkout(user_id, asset_id):
"""
Checkouts out the specified asset to the specified user.
@path '/checkouts/:user_id/new/:asset_id'
@param 'user_id'
@param 'asset_id'
"""
users = User.query.filter_by(_id=user_id)
if users.count() == 0:
abort(404)
assets = Asset.query.filter_by(_id=asset_id)
if assets.count() == 0:
abort(404)
asset = assets[0]
if asset.stock == 0:
asset.total += 1
asset.save()
checkout = Checkout()
checkout.user_id = user_id
checkout.asset_id = asset_id
checkout.save()
return redirect(url_for("checkouts_list"))
