Question

尝试更新具有以下关系的记录时，我遇到了一些麻烦：

events_mentor_table = db.Table('events_mentors', db.Model.metadata,
    db.Column('event_id', db.Integer, ForeignKey('event.id')),
    db.Column('mentor_id', db.Integer, ForeignKey('mentor.id'))
)

class Mentor(db.Model):
    __tablename__ = 'mentor'
    id = db.Column(db.Integer(), primary_key=True)
    first_name = db.Column(db.String())
    last_name = db.Column(db.String())
    job_title = db.Column(db.String())
    company_url = db.Column(db.String())
    twitter_url = db.Column(db.String())
    linkedin_url = db.Column(db.String())
    bio = db.Column(db.Text())

    def __str__(self):
        return '%s %s (%s)' % (self.first_name, self.last_name, self.job_title)


class Event(db.Model):
    __tablename__ = 'event'
    id = db.Column(db.Integer(), primary_key=True)
    date = db.Column(db.Date())
    start_time = db.Column(db.Time())
    end_time = db.Column(db.Time())
    title = db.Column(db.String())
    address = db.Column(db.String())
    description = db.Column(db.Text())
    mentors = relationship('Mentor', secondary=events_mentor_table)

创建新条目时，我很简单：

@admin_events.route('/admin/events/create/', methods=['GET', 'POST'])
@login_required
def create_new():
    form = EventForm()
    if form.validate_on_submit():
        event = Event(**form.data)
        db.session.add(event)
        db.session.commit()
        flash('successfully added new event', 'success')
    return render_template('admin/events_create_new.html', form=form)

正常工作。编辑时我使用以下内容：

@admin_events.route('/admin/events/<int:event_id>/', methods=['GET', 'POST'])
@login_required
def edit(event_id):
    event = Event.query.filter_by(id=event_id)
    form = EventForm(obj=event.one())
    if form.validate_on_submit():
        event.update(dict(**form.data))
        db.session.commit()
        flash("info updated", "success")
    return render_template('admin/events_edit.html', event=event.one(), form=form)

但问题是我收到错误说明：

ProgrammingError: (psycopg2.ProgrammingError) can't adapt type 'Mentor'
[SQL: 'UPDATE event SET id = event_id AND id = mentor_id=%(param_1)s, date=%(date)s, start_time=%(start_time)s, end_time=%(end_time)s, title=%(title)s, address=%(address)s, description=%(description)s WHERE event.id = %(id_1)s'] [parameters: {'description': u'9', 'title': u'9', 'start_time': datetime.time(11, 11), 'param_1': [<app.models.Mentor object at 0x7f4227a6bf10>], 'id_1': 12, 'end_time': datetime.time(11, 11), 'address': u'9', 'date': datetime.date(2015, 7, 9)}]

我一直在摆弄一段时间，看起来无法解决究竟解决方案的问题。我很确定我可以清除mentor数组，从表单数据中删除form.data.mentors然后手动循环并提交，如：

mentors = form.data.mentors
del form.data.mentors
event.update(dict(**form.data))
event.mentors = mentors # this doesn't actually work, but I'm sure I could probably get it to work if I wanted to pursue this nasty solution.

Answer 1

WTForms提供https://github.com/spring-projects/spring-security/tree/4.0.1.RELEASE/samples/aspectj-jc，用于此目的。

user  nginx;
worker_processes  10;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  2024;
}
http {
    include   /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    #tcp_nopush     on;
    keepalive_timeout  20;
    gzip  on;
    include /etc/nginx/conf.d/*.conf;
}

更新wtform提交的SQLAlchemy记录

1 个答案: