我有以下问题:我的目标是建立一个可以显示在地图上的gps轨迹档案。(使用Python、Django、PostgreSQL和PostGIS) 我发现了一个教程:https://web.archive.org/web/20160425053015/http://ipasic.com/article/uploading-parsing-and-saving-gpx-data-postgis-geodjango文件上传工作正常,但我不知道如何将文件中的数据保存到数据库并将其用作模型。 我的代码:
forms.py
from django import forms
from .models import gpxFile
class UploadGpxForm(forms.ModelForm):
title = forms.CharField(max_length=100)
gpx_file = forms.FileField(required='FALSE')
class Meta:
model = gpxFile
fields = ['title', 'gpx_file']
models.py
from django.contrib.gis.db import models
from django.contrib import admin
from django.contrib.gis import admin as geoadmin
from django.db.models.manager import Manager
def GPX_Folder(instance, filename):
return "uploaded_gpx_files/%s" % (filename)
class gpxFile(models.Model):
title = models.CharField("Title", max_length=100)
gpx_file = models.FileField(upload_to=GPX_Folder, blank=True)
def __unicode__(self):
return self.title
class GPXPoint(models.Model):
name = models.CharField("Name", max_length=50, blank=True)
description = models.CharField("Description", max_length=250, blank=True)
gpx_file = models.ForeignKey(gpxFile, on_delete=models.CASCADE)
point = models.PointField()
objects = models.Manager()
def __unicode__(self):
return unicode(self.name)
class GPXTrack(models.Model):
track = models.MultiLineStringField()
gpx_file = models.ForeignKey(gpxFile, on_delete=models.CASCADE)
objects = models.Manager()
views.py
from django.shortcuts import render
from .forms import UploadGpxForm, Up
from .models import GPXPoint, GPXTrack, gpxFile
from django.http import HttpResponseRedirect
from django.contrib.gis.geos import Point, LineString, MultiLineString
from django.conf import settings
import gpxpy
import gpxpy.gpx
def home(request):
#context = {
#'notes': Note.objects.all()
#}
return render(request, 'gpsarchive/home.html')
def SaveGPXtoPostGIS(f, file_instance):
gpx_file = open(settings.MEDIA_ROOT+ '/uploaded_gpx_files'+'/' + f.name)
gpx = gpxpy.parse(gpx_file)
if gpx.waypoints:
for waypoint in gpx.waypoints:
new_waypoint = GPXPoint()
if waypoint.name:
new_waypoint.name = waypoint.name
else:
new_waypoint.name = 'unknown'
new_waypoint.point = Point(waypoint.longitude, waypoint.latitude)
new_waypoint.gpx_file = file_instance
new_waypoint.save()
if gpx.tracks:
for track in gpx.tracks:
print("track name:" +str(track.name))
new_track = GPXTrack()
for segment in track.segments:
track_list_of_points = []
for point in segment.points:
point_in_segment = Point(point.longitude, point.latitude)
track_list_of_points.append(point_in_segment.coords)
new_track_segment = LineString(track_list_of_points)
new_track.track = MultiLineString(new_track_segment)
new_track.gpx_file = file_instance
new_track.save()
def upload_gpx(request):
if request.method == 'POST':
file_instance = gpxFile()
form = UploadGpxForm(request.POST, request.FILES)
if form.is_valid():
form.save()
SaveGPXtoPostGIS(request.FILES['gpx_file'], file_instance)
return HttpResponseRedirect('success/')
else:
form = UploadGpxForm()
return render(request, 'gpsarchive/form.html', {'form':form})
def upload_success(request):
return render(request, 'gpsarchive/success.html')
正如我前面提到的,文件上载可以正常工作,但不幸的是出现了以下错误: [Errno 2]没有这样的文件或目录:'/upload\u gpx\u files/3359239.gpx' 我不知道是什么导致了这个错误,因为文件和它的目录都存在,如果有任何建议,我将不胜感激
目前没有回答
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