BC, LC: Fix SQL export.

src/Model/BoundaryCondition/BoundaryCondition.py

@@ -96,7 +96,10 @@ class BoundaryCondition(SQLSubModel):
                 name = row[1],
                 status = data['status']
             )
-            bc.node = next(filter(lambda n: n.id == row[3], data["nodes"]))
+
+            bc.node = None
+            if row[3] != -1:
+                bc.node = next(filter(lambda n: n.id == row[3], data["nodes"]))
 
             values = execute(
                 "SELECT ind, data0, data1 FROM boundary_condition_data " +

src/Model/BoundaryCondition/BoundaryConditionList.py

@@ -53,6 +53,8 @@ class BoundaryConditionList(SQLSubModel):
         return new
 
     def _sql_save(self, execute, data = None):
+        execute("DELETE FROM boundary_condition")
+
         if data is None:
             data = {}
 

src/Model/LateralContribution/LateralContribution.py

@@ -96,7 +96,9 @@ class LateralContribution(SQLSubModel):
                 name = row[1],
                 status = data['status']
             )
-            lc.edge = next(filter(lambda e: e.id == row[3], data["edges"]))
+            lc.edge = None
+            if row[3] != -1:
+                lc.edge = next(filter(lambda e: e.id == row[3], data["edges"]))
             lc._begin_kp = row[4]
             lc._end_kp = row[5]
 

src/Model/LateralContribution/LateralContributionList.py

@@ -51,6 +51,8 @@ class LateralContributionList(SQLSubModel):
         return new
 
     def _sql_save(self, execute, data = None):
+        execute("DELETE FROM lateral_contribution")
+
         if data is None:
             data = {}