Question

我尝试使用通用# models.py class Building(models.Model): point = PointField('kort markør', null=True) country = models.CharField('land', max_length=100, blank=True, null=True, default='Danmark') city = models.CharField('by', max_length=100, blank=True, null=True)模板在表单中显示# views.py from django.contrib.auth.mixins import LoginRequiredMixin from django.urls import reverse_lazy from django.views.generic import ListView, CreateView, UpdateView, DeleteView, DetailView from django.contrib.gis import forms from .forms import BuildingForm from .models import Building class BuildingCreateView(LoginRequiredMixin, CreateView): form_class = BuildingForm template_name = 'cms/building_form.html'。

# forms.py

from django.contrib.gis.forms import OSMWidget, PointField, ModelForm

from .models import Building


class BuildingForm(ModelForm):
    point = PointField(
        widget=OSMWidget(
            attrs={'map_width': 600,
                   'map_height': 400,
                   'template_name': 'gis/openlayers-osm.html',
                   'default_lat': 57,
                   'default_lon': 12}))

    class Meta:
        model = Building
        fields = ['city', 'country', 'point']

# buildings_form.html
{% block content %}

    <form enctype="multipart/form-data" method="post" action="">
        {% csrf_token %}
        <ul>
            {{ form.as_ul }}
        </ul>
        <input type="submit" value="Submit"/>
    </form>

{% endblock %}

# web inspector

  <script type="text/javascript">
    var map_options = {};

    var base_layer = new ol.layer.Tile({source: new ol.source.OSM()});

    var options = {
        base_layer: base_layer,
        geom_name: 'Point',
        id: 'id_point',
        map_id: 'id_point_map',
        map_options: map_options,
        map_srid: 3857,
        name: 'point'
    };

    options['default_lon'] = 12;
    options['default_lat'] = 57;
    options['default_zoom'] = 12;

    var geodjango_point = new MapWidget(options); 
</script>

ReferenceError: ol is not defined

但地图不会在模板中显示，但它只是显示为空div。如果我检查这些元素，我可以看到它。

ReferenceError: MapWidget is not defined

控制台输出此错误：# building_form.html {% block extra_css %} <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.css"> {% endblock %} {% block extra_js %} <script src="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.js"></script> {% endblock %}

所以我认为它不会加载javascript。或者我需要具体说明js在widget属性中的位置。但我无法在文档中找到任何内容。

我也尝试过以下方法：它从cloudflare加载资源，但它会抛出ReferenceError: ol is not defined

class BuildingForm(ModelForm):
    point = PointField(
        widget=OSMWidget(
            attrs={'map_width': 600,
                   'map_height': 400,
                   'template_name': 'gis/openlayers-osm.html',
                   'default_lat': 57,
                   'default_lon': 12}))

    class Meta:
        model = Building
        fields = ['project', 'description', 'point']

    class Media:
        css = {
            'all': (
                'https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.css',
                'gis/css/ol3.css',
            )
        }
        js = (
            'https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.js',
            'gis/js/OLMapWidget.js',
        )

并将其添加到表单媒体类中，但它不会触发模板头部的js和css并抛出w = BuildingForm() >>> print(w.media) <link href="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.css" type="text/css" media="all" rel="stylesheet" /> <link href="/static/gis/css/ol3.css" type="text/css" media="all" rel="stylesheet" /> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.js"></script> <script type="text/javascript" src="/static/gis/js/OLMapWidget.js"></script>

{{1}}

但如果我在控制台中测试媒体内容，一切都很好：

{{1}}

有人可以帮忙吗？我非常困惑。谢谢。

Answer 1

这里要做一些改动：

在buildings_form.html中，在模板的head部分中渲染媒体。

<html>
<head>
    {{ form.media }}
</head>

<body>
    <div id="map">
        <form enctype="multipart/form-data" method="post" action="">
            {% csrf_token %}
                {{ form.as_p }}
            <input type="submit" value="Submit"/>
        </form>
    </div>
</body>
</html>

当像您一样对ModelForm进行子类化时，还需要将其设置为自定义CreateView中的表单类。

class MapCreateView(CreateView):
    form_class = MapForm
    template_name = 'buildings_form.html'

同样在自定义ModelForm中，应在窗口小部件类属性中指定字段的窗口小部件。

class BuildingForm(ModelForm):
    class Meta:
        model = Building
        fields = ('point',)
        widgets = {
            'point': gis_forms.OSMWidget(
                attrs={
                    'map_width': 800,
                    'map_height': 500,
                }
            )
        }

OSMWidget - 地图不在模板中显示 - ReferenceError：未定义ol

1 个答案: