Geodjango admin, display pointfield not as map

Update

This is how I managed -at last- to keep separate fields for lattitude and longitude without having to save them in the database since the values are already saved in the PointField.

The idea is :

• If we are inserting a new entry, the latitude and longitude fields will be used to set the PointField
• If we open an existing PointField entry, it will be used to provide the latitude and longitude values in the relevant FormFields.

models.py

from django.contrib.gis.db import models as geomodels


class Entry(geomodels.Model):
    point = geomodels.PointField(
        srid=4326,
        blank=True,
        )

admin.py

from myapp.forms import EntryForm
from django.contrib import admin


class EntryAdmin(admin.ModelAdmin):
    form = EntryForm


admin.site.register(Entry, EntryAdmin)

forms.py

from django import forms
from myapp.models import Entry
from django.contrib.gis.geos import Point


class MarketEntryForm(forms.ModelForm):

    latitude = forms.DecimalField(
        min_value=-90,
        max_value=90,
        required=True,
    )
    longitude = forms.DecimalField(
        min_value=-180,
        max_value=180,
        required=True,
    )

    class Meta(object):
        model = MarketEntry
        exclude = []
        widgets = {'point': forms.HiddenInput()}

    def clean(self):
        super().clean()
        if any(x for x in ['latitude', 'longitude'] if x in self.changed_data):
            latitude = float(self.cleaned_data['latitude'])
            longitude = float(self.cleaned_data['longitude'])
            self.cleaned_data['point'] = Point(longitude, latitude)

    def __init__(self, *args, **kwargs):
        try:    
            coordinates = kwargs['instance'].point.tuple    #If PointField exists 
            initial = kwargs.get('initial', {})    
            initial['longitude'] = coordinates[0]    #Set longitude from coordinates
            initial['latitude'] = coordinates[1]    #Set Latitude from coordinates
            kwargs['initial'] = initial
        except (KeyError, AttributeError):
            pass
        super().__init__(*args, **kwargs)

---

From the source code of PointField we see that its form class uses the OpenLayersWidget which inherits from the BaseGeometryWidget.

The conclusion is that in this class, the variable display_raw is by default set to False.

If you set it to True in yourapp/admin.py, you will get a textbox with lat and long and other data, useful for debugging purposes:

from django.contrib.gis import admin
from yourapp.models import YourClass
from django.contrib.gis import forms
from django.contrib.gis.db import models    


class YourClassAdminForm(forms.ModelForm):
    your_attribute = forms.PointField(widget=forms.OSMWidget(attrs={
            'display_raw': True}))

class YourClassAdmin(admin.GeoModelAdmin):
    form = YourClassAdminForm


admin.site.register(YourClass, YourClassAdmin)

---

There is also a way to have both a map and manual insertion of longitude / latitude permanently (not only for debugging).

The idea is to use FloatFields to insert the Longitude/Latitude and update the PointField with the inserted data.

You can override a widget with another in Django admin. From the documentation -

from django.db import models
from django.contrib import admin

# Import our custom widget and our model from where they're defined
from myapp.widgets import RichTextEditorWidget
from myapp.models import MyModel

class MyModelAdmin(admin.ModelAdmin):
    formfield_overrides = {
        models.TextField: {'widget': RichTextEditorWidget},
    }

This overrides TextField with RichTextEditorWidget. Just find the field type for point field and override it with TextField.