# Buggy code
def profile():
    content = (
        ub.session.query(ub.User).filter(ub.User.id == int(current_user.id)).first()
    )
    downloads = list()
    languages = speaking_language()
    translations = babel.list_translations() + [LC("en")]
    for book in content.downloads:
        downloadBook = (
            db.session.query(db.Books).filter(db.Books.id == book.book_id).first()
        )
        if downloadBook:
            downloads.append(
                db.session.query(db.Books).filter(db.Books.id == book.book_id).first()
            )
        else:
            ub.delete_download(book.book_id)
            # ub.session.query(ub.Downloads).filter(book.book_id == ub.Downloads.book_id).delete()
            # ub.session.commit()
    if request.method == "POST":
        to_save = request.form.to_dict()
        content.random_books = 0
        if current_user.role_passwd() or current_user.role_admin():
            if "password" in to_save and to_save["password"]:
                content.password = generate_password_hash(to_save["password"])
        if "kindle_mail" in to_save and to_save["kindle_mail"] != content.kindle_mail:
            content.kindle_mail = to_save["kindle_mail"]
        if to_save["email"] and to_save["email"] != content.email:
            if config.config_public_reg and not check_valid_domain(to_save["email"]):
                flash(_("E-mail is not from valid domain"), category="error")
                return render_title_template(
                    "user_edit.html",
                    content=content,
                    downloads=downloads,
                    title=_("%(name)s's profile", name=current_user.nickname),
                )
            content.email = to_save["email"]
        if "show_random" in to_save and to_save["show_random"] == "on":
            content.random_books = 1
        if "default_language" in to_save:
            content.default_language = to_save["default_language"]
        if "locale" in to_save:
            content.locale = to_save["locale"]
        content.sidebar_view = 0
        if "show_random" in to_save:
            content.sidebar_view += ub.SIDEBAR_RANDOM
        if "show_language" in to_save:
            content.sidebar_view += ub.SIDEBAR_LANGUAGE
        if "show_series" in to_save:
            content.sidebar_view += ub.SIDEBAR_SERIES
        if "show_category" in to_save:
            content.sidebar_view += ub.SIDEBAR_CATEGORY
        if "show_recent" in to_save:
            content.sidebar_view += ub.SIDEBAR_RECENT
        if "show_sorted" in to_save:
            content.sidebar_view += ub.SIDEBAR_SORTED
        if "show_hot" in to_save:
            content.sidebar_view += ub.SIDEBAR_HOT
        if "show_best_rated" in to_save:
            content.sidebar_view += ub.SIDEBAR_BEST_RATED
        if "show_author" in to_save:
            content.sidebar_view += ub.SIDEBAR_AUTHOR
        if "show_publisher" in to_save:
            content.sidebar_view += ub.SIDEBAR_PUBLISHER
        if "show_read_and_unread" in to_save:
            content.sidebar_view += ub.SIDEBAR_READ_AND_UNREAD
        if "show_detail_random" in to_save:
            content.sidebar_view += ub.DETAIL_RANDOM

        content.mature_content = "show_mature_content" in to_save
        content.theme = int(to_save["theme"])

        try:
            ub.session.commit()
        except IntegrityError:
            ub.session.rollback()
            flash(
                _("Found an existing account for this e-mail address."),
                category="error",
            )
            return render_title_template(
                "user_edit.html",
                content=content,
                downloads=downloads,
                title=_("%(name)s's profile", name=current_user.nickname),
            )
        flash(_("Profile updated"), category="success")
    return render_title_template(
        "user_edit.html",
        translations=translations,
        profile=1,
        languages=languages,
        content=content,
        downloads=downloads,
        title=_("%(name)s's profile", name=current_user.nickname),
        page="me",
    )


# 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 profile():
    content = (
        ub.session.query(ub.User).filter(ub.User.id == int(current_user.id)).first()
    )
    downloads = list()
    languages = speaking_language()
    translations = babel.list_translations() + [LC("en")]
    for book in content.downloads:
        downloadBook = (
            db.session.query(db.Books).filter(db.Books.id == book.book_id).first()
        )
        if downloadBook:
            downloads.append(
                db.session.query(db.Books).filter(db.Books.id == book.book_id).first()
            )
        else:
            ub.delete_download(book.book_id)
            # ub.session.query(ub.Downloads).filter(book.book_id == ub.Downloads.book_id).delete()
            # ub.session.commit()
    if request.method == "POST":
        to_save = request.form.to_dict()
        content.random_books = 0
        if current_user.role_passwd() or current_user.role_admin():
            if "password" in to_save and to_save["password"]:
                content.password = generate_password_hash(to_save["password"])
        if "kindle_mail" in to_save and to_save["kindle_mail"] != content.kindle_mail:
            content.kindle_mail = to_save["kindle_mail"]
        if to_save["email"] and to_save["email"] != content.email:
            if config.config_public_reg and not check_valid_domain(to_save["email"]):
                flash(_("E-mail is not from valid domain"), category="error")
                return render_title_template(
                    "user_edit.html",
                    content=content,
                    downloads=downloads,
                    title=_("%(name)s's profile", name=current_user.nickname),
                )
            content.email = to_save["email"]
        if "show_random" in to_save and to_save["show_random"] == "on":
            content.random_books = 1
        if "default_language" in to_save:
            content.default_language = to_save["default_language"]
        if "locale" in to_save:
            content.locale = to_save["locale"]
        content.sidebar_view = 0
        if "show_random" in to_save:
            content.sidebar_view += ub.SIDEBAR_RANDOM
        if "show_language" in to_save:
            content.sidebar_view += ub.SIDEBAR_LANGUAGE
        if "show_series" in to_save:
            content.sidebar_view += ub.SIDEBAR_SERIES
        if "show_category" in to_save:
            content.sidebar_view += ub.SIDEBAR_CATEGORY
        if "show_recent" in to_save:
            content.sidebar_view += ub.SIDEBAR_RECENT
        if "show_sorted" in to_save:
            content.sidebar_view += ub.SIDEBAR_SORTED
        if "show_hot" in to_save:
            content.sidebar_view += ub.SIDEBAR_HOT
        if "show_best_rated" in to_save:
            content.sidebar_view += ub.SIDEBAR_BEST_RATED
        if "show_author" in to_save:
            content.sidebar_view += ub.SIDEBAR_AUTHOR
        if "show_publisher" in to_save:
            content.sidebar_view += ub.SIDEBAR_PUBLISHER
        if "show_read_and_unread" in to_save:
            content.sidebar_view += ub.SIDEBAR_READ_AND_UNREAD
        if "show_detail_random" in to_save:
            content.sidebar_view += ub.DETAIL_RANDOM

        content.mature_content = "show_mature_content" in to_save

        try:
            ub.session.commit()
        except IntegrityError:
            ub.session.rollback()
            flash(
                _("Found an existing account for this e-mail address."),
                category="error",
            )
            return render_title_template(
                "user_edit.html",
                content=content,
                downloads=downloads,
                title=_("%(name)s's profile", name=current_user.nickname),
            )
        flash(_("Profile updated"), category="success")
    return render_title_template(
        "user_edit.html",
        translations=translations,
        profile=1,
        languages=languages,
        content=content,
        downloads=downloads,
        title=_("%(name)s's profile", name=current_user.nickname),
        page="me",
    )