Add 'needs_push' field

fgs/model.py

@@ -85,6 +85,7 @@ class BoundingBox(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     collar_id = db.Column(db.Integer, db.ForeignKey('collar.id'))
     num_points = db.Column(db.Integer)
+    needs_push = db.Column(db.Boolean)
     coord0x = db.Column(db.Float(precision=10))
     coord0y = db.Column(db.Float(precision=10))
     coord1x = db.Column(db.Float(precision=10))

fgs/views.py

@@ -164,6 +164,7 @@ def collar_set_boundary(id):
     if collar is None: abort(404)
 
     new_boundary = flatten(request.json)
+    new_boundary.needs_push = True
     if collar.boundary is not None:
         db.session.delete(collar.boundary)
     collar.boundary = new_boundary