Merge pull request plasmo-dev#90 from dlcole3/dc/fix_dual_call

Updated `dual(subgraph, linkconstraint)` to call from correct subgraph
jalving · Oct 7, 2023 · 51bb4c6 · 51bb4c6
2 parents 6a371f5 + 3a809da
commit 51bb4c6
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diff --git a/src/optiedge.jl b/src/optiedge.jl
@@ -118,10 +118,9 @@ function JuMP.constraint_object(linkref::LinkConstraintRef)
     return linkref.optiedge.linkconstraints[linkref.idx]
 end
 
-#TODO: Update this
 function JuMP.dual(linkref::LinkConstraintRef)
     optiedge = JuMP.owner_model(linkref)
-    id = optiedge.backend.last_solution_id
+    # this grabs the last solution
     return MOI.get(optiedge.backend, MOI.ConstraintDual(), linkref)
 end
 

diff --git a/src/optigraph.jl b/src/optigraph.jl
@@ -889,8 +889,9 @@ Retrieve the dual value of `linkref` on optigraph `graph`.
 """
 function JuMP.dual(graph::OptiGraph, linkref::LinkConstraintRef)
     optiedge = JuMP.owner_model(linkref)
-    id = graph.id
-    return MOI.get(optiedge.backend, MOI.ConstraintDual(), linkref)
+    edge_pointer = optiedge.backend.optimizers[graph.id]
+    dual_value = MOI.get(optiedge.backend, MOI.ConstraintDual(), linkref)
+    return dual_value
 end
 
 # set start value for a graph backend