Question

在documentation page上，有一些如何使用WTForms-Alchemy与一对一和一对多关系的例子。我有使用多对多的表格，我似乎无法弄清楚如何渲染这些表单字段。我的代码在下面供参考。

from flask.ext.wtf import Form
from wtforms import Form as Form2
from wtforms_alchemy import model_form_factory, ModelForm, ModelFieldList
from wtforms.fields import FormField
from app.models.bookmodel import Book
from app.models.submodels import BookTypeForm

BaseModelForm = model_form_factory(Form)
BaseSubModelForm = model_form_factory(Form2)

class ModelForm(BaseModelForm):
    @classmethod
    def get_session(self):
        return db.session

class SubModelForm(BaseSubModelForm):
    @classmethod
    def get_session(self):
        return db.session

class BookTypeForm(SubModelForm):
    class Meta:
        model = BookType
        only = ['name']

class BookForm(ModelForm):
    class Meta:
        model = Book

    book_type = ModelFieldList(FormField(BookTypeForm))

这是book_type字段和模型

class BookType(db.Model):
    __tablename__ = 'book_type'

    id = db.Column(db.Integer, autoincrement=True, primary_key=True)
    name = db.Column(
        ChoiceType(BOOK_TYPES, impl=db.Unicode(16))
    )

    def __repr__(self):
        return "<BookType (name='%s')>" % self.name

WTForms-Alchemy的多对多关系领域？

0 个答案: