# Buggy code
def get_updater_status():
    status = {}
    if request.method == "POST":
        commit = request.form.to_dict()
        if "start" in commit and commit["start"] == "True":
            text = {
                "1": _("Requesting update package"),
                "2": _("Downloading update package"),
                "3": _("Unzipping update package"),
                "4": _("Replacing files"),
                "5": _("Database connections are closed"),
                "6": _("Stopping server"),
                "7": _("Update finished, please press okay and reload page"),
                "8": _("Update failed:") + " " + _("HTTP Error"),
                "9": _("Update failed:") + " " + _("Connection error"),
                "10": _("Update failed:")
                + " "
                + _("Timeout while establishing connection"),
                "11": _("Update failed:") + " " + _("General error"),
            }
            status["text"] = text
            helper.updater_thread = helper.Updater()
            helper.updater_thread.start()
            status["status"] = helper.updater_thread.get_update_status()
    elif request.method == "GET":
        try:
            status["status"] = helper.updater_thread.get_update_status()
        except AttributeError:
            # thread is not active, occours after restart on update
            status["status"] = 7
        except Exception:
            status["status"] = 11
    return json.dumps(status)


# Traceback (OperationalError)
ERROR:cps.web:Exception on /book/125 [GET]
Traceback (most recent call last):
File "/Users/jgillman/Code/calibre-web/vendor/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/Users/jgillman/Code/calibre-web/vendor/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/jgillman/Code/calibre-web/vendor/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/jgillman/Code/calibre-web/vendor/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/jgillman/Code/calibre-web/vendor/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/jgillman/Code/calibre-web/vendor/flask_login.py", line 717, in decorated_view
return func(*args, **kwargs)
File "/Users/jgillman/Code/calibre-web/cps/web.py", line 381, in show_book
return render_template('detail.html', entry=entries,  cc=cc, title=entries.title, books_shelfs=book_in_shelfs)
File "/Users/jgillman/Code/calibre-web/vendor/flask/templating.py", line 128, in render_template
context, ctx.app)
File "/Users/jgillman/Code/calibre-web/vendor/flask/templating.py", line 110, in _render
rv = template.render(context)
File "/Users/jgillman/Code/calibre-web/vendor/jinja2/environment.py", line 969, in render
return self.environment.handle_exception(exc_info, True)
File "/Users/jgillman/Code/calibre-web/vendor/jinja2/environment.py", line 742, in handle_exception
reraise(exc_type, exc_value, tb)
File "/Users/jgillman/Code/calibre-web/cps/templates/detail.html", line 1, in top-level template code
{% extends "layout.html" %}
File "/Users/jgillman/Code/calibre-web/cps/templates/layout.html", line 136, in top-level template code
{% block body %}{% endblock %}
File "/Users/jgillman/Code/calibre-web/cps/templates/detail.html", line 66, in block "body"
{% if entry['custom_column_' ~ c.id]|length > 0 %}
File "/Users/jgillman/Code/calibre-web/vendor/jinja2/environment.py", line 387, in getitem
return getattr(obj, attr)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/attributes.py", line 316, in __get__
return self.impl.get(instance_state(instance), dict_)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/attributes.py", line 613, in get
value = self.callable_(state, passive)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/strategies.py", line 524, in _load_for_state
return self._emit_lazyload(session, state, ident_key, passive)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/strategies.py", line 585, in _emit_lazyload
result = q.all()
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/query.py", line 2241, in all
return list(self)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/query.py", line 2353, in __iter__
return self._execute_and_instances(context)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/orm/query.py", line 2368, in _execute_and_instances
result = conn.execute(querycontext.statement, self._params)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/engine/base.py", line 662, in execute
params)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/engine/base.py", line 761, in _execute_clauseelement
compiled_sql, distilled_params
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/engine/base.py", line 874, in _execute_context
context)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/engine/base.py", line 1024, in _handle_dbapi_exception
exc_info
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/util/compat.py", line 196, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/engine/base.py", line 867, in _execute_context
context)
File "/Users/jgillman/Code/calibre-web/vendor/sqlalchemy/engine/default.py", line 324, in do_execute
cursor.execute(statement, parameters)
OperationalError: (OperationalError) no such table: books_custom_column_1_link u'SELECT custom_column_1.id AS custom_column_1_id, custom_column_1.value AS custom_column_1_value \
nFROM custom_column_1, books_custom_column_1_link \nWHERE ? = books_custom_column_1_link.book AND custom_column_1.id = books_custom_column_1_link.value' (125,)
ERROR:tornado.access:500 GET /book/125 (::1) 89.60ms

# Fixed code
def get_updater_status():
    status = {}
    if request.method == "POST":
        commit = request.form.to_dict()
        if "start" in commit and commit["start"] == "True":
            text = {
                "1": _("Requesting update package"),
                "2": _("Downloading update package"),
                "3": _("Unzipping update package"),
                "4": _("Replacing files"),
                "5": _("Database connections are closed"),
                "6": _("Stopping server"),
                "7": _("Update finished, please press okay and reload page"),
                "8": _("Update failed:") + " " + _("HTTP Error"),
                "9": _("Update failed:") + " " + _("Connection error"),
                "10": _("Update failed:")
                + " "
                + _("Timeout while establishing connection"),
                "11": _("Update failed:") + " " + _("General error"),
            }
            status["text"] = text
            # helper.updater_thread = helper.Updater()
            updater_thread.status = 0
            updater_thread.start()
            status["status"] = updater_thread.get_update_status()
    elif request.method == "GET":
        try:
            status["status"] = updater_thread.get_update_status()
            if status["status"] == -1:
                status["status"] = 7
        except AttributeError:
            # thread is not active, occours after restart on update
            status["status"] = 7
        except Exception:
            status["status"] = 11
    return json.dumps(status)