Model, Geometry: Save and load geometry into SQLite.

src/Model/River.py

@@ -127,6 +127,9 @@ class RiverReach(Edge, SQLSubModel):
     def _sql_load(cls, execute, data = None):
         reachs = []
 
+        if data is None:
+            data = {}
+
         table = execute("SELECT id, name, enable, node1, node2 FROM river_reach")
         for row in table:
             # Update id counter
@@ -141,6 +144,11 @@ class RiverReach(Edge, SQLSubModel):
 
             new = cls(id, name, node1, node2, status = data["status"])
             new.enable(enable = enable)
+
+            data["reach"] = id
+            data["parent"] = new
+            new._reach = Reach._sql_load(execute, data)
+
             reachs.append(new)
 
         return reachs
@@ -157,7 +165,8 @@ class RiverReach(Edge, SQLSubModel):
         )
         execute(sql)
 
-        return True
+        objs = [self._reach]
+        return self._save_submodel(execute, objs, data)
 
     @property
     def reach(self):