【Flask微电影】20.会员修改密码，表单下拉列表同步数据库

## 修改密码 ### 修改密码 #### 创建修改密码的表单 ```python class PwdForm(FlaskForm): old_pwd = PasswordField( label='旧密码', validators=[ DataRequired('请输入旧密码！') ], description='旧密码', render_kw={ 'class': "form-control", 'placeholder': "请输入旧密码", 'required': "required" } ) new_pwd = PasswordField( label='新密码', validators=[ DataRequired('请输入新密码！') ], description='新密码', render_kw={ 'class': "form-control", 'placeholder': "请输入新密码", 'required': "required" } ) submit = SubmitField( label='提交', render_kw={ 'class': "btn btn-primary" } ) def validate_old_pwd(self, field): """检查验证旧密码是否正确""" from flask import session old_pwd = field.data login_name = session['login_admin'] admin = Admin.query.filter_by(name=login_name).first() if not admin.check_pwd(old_pwd): raise ValidationError('旧密码错误！') ``` #### 修改pwd密码更新视图 ```python @admin.route("/pwd/", methods=['GET', 'POST']) @admin_login_require def pwd(): form = PwdForm() if form.validate_on_submit(): data = form.data login_name = session['login_admin'] admin = Admin.query.filter_by(name=login_name).first() from werkzeug.security import generate_password_hash admin.pwd = generate_password_hash(data['new_pwd']) db.session.commit() # 提交新密码保存，然后跳转到登录界面 flash('密码修改成功，请重新登录！', category='ok') return redirect(url_for('admin.logout')) return render_template('admin/pwd.html', form=form) ``` #### 修改pwd.html密码更新表单 ```html <form role="form" method="post"> <div class="box-body"> <div class="form-group"> <label for="input_pwd">{{ form.old_pwd.label }}</label> {{ form.old_pwd }} {% for err in form.old_pwd.errors %} <div class="col-md-12" style="color: red">{{ err }}</div> {% endfor %} </div> <div class="form-group"> <label for="input_newpwd">{{ form.new_pwd.label }}</label> {{ form.new_pwd }} {% for err in form.new_pwd.errors %} <div class="col-md-12" style="color: red">{{ err }}</div> {% endfor %} </div> </div> {{ form.csrf_token }} <div class="box-footer"> {{ form.submit }} </div> </form> ```  #### 修改login.html密码修改登录提示 增加`flash`的提示 ```html {% include 'admin/alert_info.html' %} ```  ### 后台页面显示登录用户 修改base.html增加显示登录名，两种方式都可使用 ```html <span class="hidden-xs">{{ session.login_admin }}</span> <p> {{ session['login_admin'] }} <small>2018-08-08</small> </p> <p>用户{{ session.login_admin }}</p> ```  ## 处理表单下拉列表与数据库不同步问题 当增加标签后，如果不重启服务器，则标签选项不会变化  ```python class MovieForm(FlaskForm): tag_id = SelectField( label='标签', validators=[ DataRequired('请选择标签！') ], coerce=int, # choices=[(tag.id, tag.name) for tag in Tag.query.all()], description='标签', render_kw={ 'class': "form-control" } ) def __init__(self, *args, **kwargs): super(MovieForm, self).__init__(*args, **kwargs) self.tag_id.choices = [(v.id, v.name) for v in Tag.query.all()] ```

明人不说暗话 领红包就是支持！！！ 来都来了，再到页面底部看下呗~ ↓ ↓ ↓

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