Modificato modello location

# Generated by Django 2.0.1 on 2018-01-14 21:51

from django.db import migrations, models

class Migration(migrations.Migration):

    dependencies = [

        ('locations', '0005_auto_20170902_2011'),

    ]

    operations = [

        migrations.AddField(

            model_name='location',

            name='name',

            field=models.CharField(default='', max_length=25),

            preserve_default=False,

        ),

    ]

# Generated by Django 2.0.1 on 2018-01-14 21:52

import django.contrib.gis.db.models.fields

from django.db import migrations, models

import django.db.models.deletion

class Migration(migrations.Migration):

    dependencies = [

        ('locations', '0006_location_name'),

    ]

    operations = [

        migrations.AlterField(

            model_name='location',

            name='coord',

            field=django.contrib.gis.db.models.fields.PointField(null=True, srid=4326),

        ),

        migrations.AlterField(

            model_name='location',

            name='map',

            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='locations.Map'),

        ),

    ]

class Location(models.Model):

    map = models.ForeignKey(Map, blank=True,on_delete=models.CASCADE)

    coord = models.PointField(blank=True)

    name = models.CharField(max_length=25, null=False)

    map = models.ForeignKey(Map, null=True, on_delete=models.CASCADE)

    coord = models.PointField(null=True)

    description = models.CharField(max_length=80, null=False)

    def clean(self):