refactor: copy added metabolites from other models (#677)

opencobra · Mar 13, 2018 · 542b0e8 · 542b0e8
1 parent 51cd74d
commit 542b0e8
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/cobra/core/reaction.py b/cobra/core/reaction.py
@@ -739,6 +739,14 @@ def add_metabolites(self, metabolites_to_add, combine=True,
         _id_to_metabolites = dict([(x.id, x) for x in self._metabolites])
 
         for metabolite, coefficient in iteritems(metabolites_to_add):
+
+            # Make sure metabolites being added belong to the same model, or
+            # else copy them.
+            if isinstance(metabolite, Metabolite):
+                if ((metabolite.model is not None) and
+                        (metabolite.model is not self._model)):
+                    metabolite = metabolite.copy()
+
             met_id = str(metabolite)
             # If a metabolite already exists in the reaction then
             # just add them.