SCIPBackend.nrows: Use model.getNConss if constraints are not cached

sagemath · Jan 4, 2023 · 38a33e0 · 38a33e0
1 parent 89e5778
commit 38a33e0
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/sage/numerical/backends/scip_backend.pyx b/src/sage/numerical/backends/scip_backend.pyx
@@ -817,6 +817,8 @@ cdef class SCIPBackend(GenericBackend):
             sage: p.nrows()
             2
         """
+        if self.constraints is None:
+            return self.model.getNConss()
         return len(self.get_constraints())
 
     cpdef col_name(self, int index):