問(wèn)題描述

新手在學(xué)flask開(kāi)發(fā)，看到《python web開(kāi)發(fā)》第十章的用戶資料，在搞 管理員級(jí)別的資料編輯器 那里出問(wèn)題了，視圖函數(shù)拋出異常，不能返回響應(yīng)百度，谷歌，sof無(wú)果。找好久了沒(méi)解決，心塞所以來(lái)尋求幫助，謝謝能提供幫助的人這是整個(gè)文件夾http://pan.baidu.com/s/1kV4sXcr

@main.route(’/edit-profile/<int:id>’, methods=[’GET’, ’POST’])@login_required@admin_requireddef edit_profile_admin(id): user = User.query.get_or_404(id) form = EditProfileAdminForm(user=user) if form.validate_on_submit():user.email = form.email.datauser.username = form.username.datauser.confirmed = form.confirmed.datauser.role = Role.query.get(form.role.data)user.name = form.name.datauser.location = form.location.datauser.about_me = form.about_me.datadb.session.add(user)flash(’The profile has been updated.’)return redirect(url_for(’.user’, username=user.username)) form.email.data = user.email form.username.data = user.username form.confirmed.data = user.confirmed form.role.data = user.role_id form.name.data = user.name form.location.data = user.location form.about_me.data = user.about_me return render_template(’edit_profile.html’, form=form, user=user)表單forms.py:

class EditProfileAdminForm(FlaskForm): email = StringField(’Email’, validators=[Required(), Length(1, 64),Email()]) username = StringField(’Username’, validators=[Required(), Length(1, 64), Regexp(’^[A-Za-z][A-Za-z0-9_.]*$’, 0, ’Username must have only letters,’ ’number, dots or underscores’)]) confirmed = BooleanField(’Confirmed’) role = SelectField(’Role’, coerce=int) name = StringField(’Real name’, validators=[Length(0, 64)]) location = StringField(’Location’, validators=[Length(0, 64)]) about_me = TextAreaField(’About me’) submit = SubmitField(’Submit’)def __init__(self, user, *args, **kwargs):super(EditProfileAdminForm, self).__init__(*args, **kwargs)self.role.choices = [(role.id, role.name) for role in Role.query.order_by(Role.name).all()]self.user = user def validate_email(self, field):if field.data != self.user.email and User.query.filter_by(email=field.date).first(): raise ValidationError(’Emai already registered.’)def validate_username(self, field):if field.data !=self.user.username and User.query.filter_by(username=field.data).first(): raise ValidationError(’Username already in use.’)模板e(cuò)dit_profile.html：

{% extends 'base.html' %}{% import 'bootstrap/wtf.html' as wtf %}{% block title %}Flasky - Edit Profile{% endblock %}{% block page_content %}<p class='page-header'> <h1>Edit Your Profile</h1></p><p class='col-md-4'> {{ wtf.quick_form(form) }}</p>{% endblock %}

問(wèn)題解答

網(wǎng)友幫助找到問(wèn)題了,檢查用戶權(quán)限的自定義裝飾器出問(wèn)題了 decorators.py ：

def permission_required(permission): def decorator(f):@wraps(f)def decorated_function(*args, **kwargs): if not current_user.can(permission):abort(403)return f(*args, **kwargs) # 此行縮進(jìn)錯(cuò)誤，應(yīng)在if語(yǔ)句外return decorated_function return decorator

修改過(guò)來(lái)就可以了。

T.T ，真是自己粗心大意。 python 代碼縮進(jìn)問(wèn)題，我特意去查了，網(wǎng)友都建議縮進(jìn)用 4 個(gè)空格，用 1 個(gè) tab 鍵代替風(fēng)險(xiǎn)太大，因?yàn)楦骷业木庉嬈鲗?duì) tab 鍵定義存在差異，很容易出問(wèn)題。雖然說(shuō)我這問(wèn)題不是出在 tab 鍵上，之后我還是會(huì)注意這個(gè)問(wèn)題的。

不過(guò)我還有一問(wèn)題，為什么錯(cuò)誤頁(yè)面拋出的是 視圖函數(shù) View function 的問(wèn)題， 而不會(huì)拋出裝飾器那邊的錯(cuò)誤，例如（ IndentationError ）： @admin_required → def permission_required(permission) 謝謝