QuerySelectField不显示预期的输出

我得到的错误为TypeError: 'Query' object is not callable。QuerySelectField不显示预期的输出

我在金字塔中创建了一个Blog引擎，并且我被卡在QuerySelectField中，如何显示分类表中显示的类别，这些分类是文章模型的一个外键？

期望输出

类别字段应该显示所有存在于数据库中选择类别。

Models.py

DBSession = scoped_session(sessionmaker(extension=ZopeTransactionExtension())) 
Base = declarative_base() 

class Category(Base): 
    __tablename__ = 'categories' 
    id = Column(Integer, primary_key=True) 
    name = Column(String(100), unique=True, nullable=False) 
    description = Column(Text, nullable=False) 


class Article(Base): 
    __tablename__ = 'articles' 
    id = Column(Integer, primary_key=True) 
    title = Column(String(255), unique=True, nullable=False) 
    body = Column(Text, nullable=False) 
    category = Column(ForeignKey(Category.name), nullable=False) 
    created = Column(DateTime, default=datetime.datetime.now) 

    @property 
    def slug(self): 
     return urlify(self.title) 

    @property 
    def created_in_words(self): 
     return time_ago_in_words(Article.created)

Views.py

from pyramid.view import view_config 
from pyramid.httpexceptions import HTTPFound 
import sqlalchemy as sa 
from blog.forms import ArticleCreateForm 

from blog.models import (
    DBSession, 
    Article, Category, 
    ) 

@view_config(route_name='home', renderer='articles/index.jinja2') 
def index(request): 
    articles = DBSession.query(Article).order_by(sa.desc(Article.created)) 
    return {'articles': articles} 

@view_config(route_name='article_action', match_param='action=create', renderer='articles/create.jinja2') 
def create(request): 
    article = Article() 
    form = ArticleCreateForm(request.POST) 
    if request.method == 'POST' and form.validate(): 
     form.populate_obj(article) 
     DBSession.add(article) 
     return HTTPFound(location=request.route_url('home')) 
    return {'form':form, 'action':request.matchdict.get('create')}

forms.py

from models import DBSession 
from models import Category 
from wtforms import Form, TextField, TextAreaField, SubmitField, validators 
from wtforms.ext.sqlalchemy.fields import QuerySelectField 

def Category_choice(): 
    return DBSession.query(Category.name) 

class ArticleCreateForm(Form): 
    title = TextField('Title', [validators.required(), validators.length(min=1,max=240)]) 
    body = TextAreaField('Content', [validators.required()]) 
    category = QuerySelectField('Category', query_factory=Category_choice()) 
    submit = SubmitField()

来源

2013-10-15 Ajay Kumar

当询问与错误有关的问题时，请包含完整的堆栈跟踪。目前，我们必须猜测你的错误发生在哪里。 –

@MarkHildreth说的。另外，线索是在我打赌的参数名称中。它应该是query_factory = Category_choice在没有“（）” –

更改这条线从query_factory=Category_choice()到query_factory=Category_choice和

更改Category_choice功能

def Category_choice(): 
    return DBSession.query(Category)

所以你的形式看起来像现在这样

def Category_choice(): 
    return DBSession.query(Category) 

class ArticleCreateForm(Form): 
    title = TextField('Title', [validators.required(), validators.length(min=1,max=240)]) 
    body = TextAreaField('Content', [validators.required()]) 
    category = QuerySelectField('Category', query_factory=Category_choice) 
    submit = SubmitField()

而在你的分类模式添加此方法电话

def __str__(self): 
     return self.name

请参阅This Documentation详细说明。

希望它有助于。

来源

2013-10-16 03:55:11 ajkumar25

QuerySelectField不显示预期的输出

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