Hi All!
I am trying to understand the behavior of Layer->Render-> Refresh layer at
interval in QGIS
- I sat up a flask rest api which serves a geojson.
- I added the geojson to QGIS via Add Layer->
- a. Protocol HTTP/cloud/etc
- b. Type: HTTP
- c.URI: localhost/points.geojson The points are represented on the map
correctly
- I changed the layer->Properties->Rendering-> Refresh layer at interval (5
sec)
I would have expected that there would be a call every 5 seconds towards the
server and the map data would be updated accordingly. But the layer does not
get refreshed. I don't see any changes neither when I remove a point from the
json file on my local drive, nor if I change an attribute. If I press F5 then
the canvas refreshes and it automatically loads the new data and I can see the
changes. Is this the behavior that is wanted or am I misunderstanding the
function of this tool? It seems like the data is cached somewhere?
from flask import Flask
from flask_restful import Api, Resource
import json
app = Flask(__name__)
api = Api(app)
class point(Resource):
def get(self):
with open('C:/points/venv/src/points.geojson') as json_file:
data = json.load(json_file)
return data
api.add_resource(point,"/points.geojson")
if __name__=="__main__":
app.run(debug=True)Robert Nagy
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