python - 在MongoEngine上渲染ListField Model_form时出现问题

我正在为项目使用Mongoengine的Flask，并且我正在尝试从http://docs.mongodb.org/manual/tutorial/write-a-tumblelog-application-with-flask-mongoengine/中获取基本内容

在实现了以上链接中的所有内容之后，我在“帖子”中添加了一个用于“标签”的新字段，当我尝试创建帖子时，我的标签未显示输入框。

任何帮助表示赞赏。

我的代码如下

class Post(db.Document):
    created_at = db.DateTimeField(default=datetime.datetime.now, required=True)
    title = db.StringField(max_length=255, required=True)
    slug = db.StringField(max_length=255, required=True)
    body = db.StringField(required=True)
    views = db.IntField(default=0)
    category = db.StringField()
    tags = db.ListField(db.StringField(max_length=30))

模板

{% macro render(form) -%}
<fieldset>
{% for field in form %}
    {% if field.type in ['CSRFTokenField', 'HiddenField'] %}
        {{ field() }}
    {% else %}
    <div class="clearfix {% if field.errors %}error{% endif %}">
        {{ field.label }}
    <div class="input">
    {% if field.type == 'ListField' %}
    {% for subfield in field.entires %}
         {% if subfield.type == 'StringField' %}
             {{ field }}
         {% endif %}
    {% endfor %}
    {% elif field.name == "body" %}
        {{ field(rows=10, style="width:360px;") }}
{% else %}
    {{ field() }}
    {% endif %}
    {% if field.errors or field.help_text %}
        <span class="help-inline">
    {% if field.errors %}
        {{ field.errors|join(' ') }}
    {% else %}
        {{ field.help_text }}
    {% endif %}
        </span>
    {% endif %}
    </div>
    </div>
{% endif %}
{% endfor %}
</fieldset>
{% endmacro %}

管理员

from flask import Blueprint, request, redirect, render_template, url_for
from flask.views import MethodView
from pprint import pprint
from flask.ext.mongoengine.wtf import model_form

from tumblog.auth import requires_auth
from tumblog.models import Post

admin = Blueprint('admin', __name__, template_folder='templates')


class List(MethodView):
    decorators = [requires_auth]
    cls = Post

    def get(self,slug=None):
        posts = self.cls.objects.all()
        return render_template('admin/list.html', posts=posts)

class delList(MethodView):
    decorators = [requires_auth]
    cls = Post

    def get(self,slug=None):
        try:
            post = self.cls.objects.get(slug=slug)
            post.delete()
        except:
            pass
        return redirect(url_for('admin.index'))

class Detail(MethodView):

    decorators = [requires_auth]

    def get_context(self, slug=None):
        form_cls = model_form(Post, exclude=('created_at', 'views'))

        if slug:
            post = Post.objects.get_or_404(slug=slug)
            if request.method == 'POST':
                form = form_cls(request.form, inital=post._data)
            else:
                form = form_cls(obj=post)
        else:
            post = Post()
            form = form_cls(request.form)

        context = {
            "post": post,
            "form": form,
            "create": slug is None
        }
        return context

    def get(self, slug):
        context = self.get_context(slug)
        return render_template('admin/detail.html', **context)

    def post(self, slug):
        context = self.get_context(slug)
        form = context.get('form')

        if form.validate():
            post = context.get('post')
            form.populate_obj(post)
            post.save()

            return redirect(url_for('admin.index'))
        return render_template('admin/detail.html', **context)


# Register the urls
admin.add_url_rule('/admin/', view_func=List.as_view('index'))
admin.add_url_rule('/admin/create/', defaults={'slug': None}, view_func=Detail.as_view('create'))
admin.add_url_rule('/admin/edit/<slug>/', view_func=Detail.as_view('edit'))
admin.add_url_rule('/admin/delete/<slug>/', view_func=delList.as_view('delete'))

最佳答案

因为列表字段可能对每个项目都有自己的特殊类型，所以您可能需要define custom fields;或者您可以尝试直接使用 wtforms.fields.FieldList 。

很难说出您遇到了哪个错误。您可以尝试将信息放入表单中进行调试，例如

{% for field in form %}
    <!-- {{field.type}} {{field.label}} -->
    ... etc ...
{% endfor %}

还注意到您有错字

{% for subfield in field.entires %} <=== did you mean field.entries ?

赏金问题:

除非在声明字段时定义help_text，否则将无法按预期工作:

{{ field.help_text }}

您在声明字段时需要将其包括在内，例如

oid = ObjectIdField(..., help_text="object id")

关于python - 在MongoEngine上渲染ListField Model_form时出现问题，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20852184/