I use flask-whooshee to search but I got UnknownFieldError returned

[yyz1018tt]

I register the column 'title' like:

@whooshee.register_model('body', 'title')
class Post(db.Model):
    __tablename__ = 'posts'
    id = db.Column(db.Integer, primary_key=True)
    body = db.Column(db.Text)
    title = db.Column(db.String(60))

there are other two models:

@whooshee.register_model('name')
class Category(db.Model):
    __tablename__ = 'categories'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(30), unique=True)
    posts = db.relationship('Post', back_populates='category')

@whooshee.register_model('username', 'name')
class User(UserMixin, db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(64), unique=True, index=True)
    username = db.Column(db.String(64), unique=True, index=True)
    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))
    password_hash = db.Column(db.String(128))
    confirmed = db.Column(db.Boolean, default=False)
    name = db.Column(db.String(64))

but I got

UnknownFieldError:No field named 'title' in <Schema: ['body', 'id']>

when I do the search, I do not know how to deal with it, the model User and Category are correct but the Post.

[yyz1018tt]

Here is the traceback, dont know if it helps.

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Users/yangyuze/Documents/Sample/venv/lib/python2.7/site-packages/flask_whooshee.py", line 469, in reindex
    getattr(wh, method_name)(writer, item)
  File "/Users/yangyuze/Documents/Sample/venv/lib/python2.7/site-packages/flask_whooshee.py", line 345, in update_model
    writer.update_document(**attrs)
  File "/Users/yangyuze/Documents/Sample/venv/lib/python2.7/site-packages/whoosh/writing.py", line 490, in update_document
    self.add_document(**fields)
  File "/Users/yangyuze/Documents/Sample/venv/lib/python2.7/site-packages/whoosh/writing.py", line 730, in add_document
    self._check_fields(schema, fieldnames)
  File "/Users/yangyuze/Documents/Sample/venv/lib/python2.7/site-packages/whoosh/writing.py", line 718, in _check_fields
    % (name, schema))

[bkabrda]

Thanks for the bug report!
Did you have a previous version of the code that used just @whooshee.register_model('body')? If so, you'd need to do reindexing [1].
What you're seeing is a Whoosh error that says the schema only has id and body, so that would suggest it was created before you also added title in your code. If you can confirm this and reindex will work for you, I'll make this clear in the documentation.
If this is not the case, please let me know flask-whooshee version you're using and we'll come up with a reproducer and a fix.

[1] https://flask-whooshee.readthedocs.io/en/latest/#reindexing