From 6e8dcc15c1e5e03e65597df7c6a80c223a7a746d Mon Sep 17 00:00:00 2001
From: joaquimg <joaquimg@users.noreply.github.com>
Date: Sun, 22 Feb 2026 16:21:36 -0300
Subject: [PATCH 1/2] Add missing cubic parametric cubic type

---
 src/MOI_wrapper.jl | 16 +++++++++++++++-
 test/test_cubic.jl | 30 ++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/src/MOI_wrapper.jl b/src/MOI_wrapper.jl
index 0e605104..62c01735 100644
--- a/src/MOI_wrapper.jl
+++ b/src/MOI_wrapper.jl
@@ -1664,7 +1664,9 @@ queried using the [`ParametricObjectiveFunction{P}`](@ref) attribute. The type
 struct ParametricObjectiveType <: MOI.AbstractModelAttribute end
 
 function MOI.get(model::Optimizer{T}, ::ParametricObjectiveType) where {T}
-    if model.quadratic_objective_cache !== nothing
+    if model.cubic_objective_cache !== nothing
+        return ParametricCubicFunction{T}
+    elseif model.quadratic_objective_cache !== nothing
         return ParametricQuadraticFunction{T}
     elseif model.affine_objective_cache !== nothing
         return ParametricAffineFunction{T}
@@ -1704,6 +1706,18 @@ function MOI.get(
     return model.affine_objective_cache
 end
 
+function MOI.get(
+    model::Optimizer{T},
+    ::ParametricObjectiveFunction{ParametricCubicFunction{T}},
+) where {T}
+    if model.cubic_objective_cache === nothing
+        error("
+            There is no parametric cubic objective function in the model.
+        ")
+    end
+    return model.cubic_objective_cache
+end
+
 """
     ListOfParametricConstraintTypesPresent()
 
diff --git a/test/test_cubic.jl b/test/test_cubic.jl
index 4da52914..44652b52 100644
--- a/test/test_cubic.jl
+++ b/test/test_cubic.jl
@@ -1623,6 +1623,36 @@ function test_jump_cubic_direct_model_ppp()
     return
 end
 
+function test_parametric_objective_type_cubic()
+    model = Model(() -> POI.Optimizer(HiGHS.Optimizer()))
+    set_silent(model)
+    @variable(model, x)
+    @variable(model, p in MOI.Parameter(2.0))
+    @variable(model, q in MOI.Parameter(3.0))
+    @constraint(model, x >= 1)
+    @objective(model, Min, x + p * q^2)
+    optimize!(model)
+    inner = unsafe_backend(model)
+    @test MOI.get(inner, POI.ParametricObjectiveType()) == POI.ParametricCubicFunction{Float64}
+    pf = MOI.get(inner, POI.ParametricObjectiveFunction{POI.ParametricCubicFunction{Float64}}())
+    @test pf isa POI.ParametricCubicFunction{Float64}
+    return
+end
+
+function test_parametric_objective_type_cubic_error()
+    model = Model(() -> POI.Optimizer(HiGHS.Optimizer()))
+    set_silent(model)
+    @variable(model, x >= 1)
+    @objective(model, Min, x)
+    optimize!(model)
+    inner = unsafe_backend(model)
+    @test_throws ErrorException MOI.get(
+        inner,
+        POI.ParametricObjectiveFunction{POI.ParametricCubicFunction{Float64}}(),
+    )
+    return
+end
+
 end  # module
 
 TestCubic.runtests()

From 0ecfcfb8ffa93509da461fd85f75644f9a4b7fed Mon Sep 17 00:00:00 2001
From: joaquimg <joaquimg@users.noreply.github.com>
Date: Sun, 22 Feb 2026 16:24:55 -0300
Subject: [PATCH 2/2] format

---
 test/test_cubic.jl | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/test/test_cubic.jl b/test/test_cubic.jl
index 44652b52..cc3eb9f8 100644
--- a/test/test_cubic.jl
+++ b/test/test_cubic.jl
@@ -1633,8 +1633,12 @@ function test_parametric_objective_type_cubic()
     @objective(model, Min, x + p * q^2)
     optimize!(model)
     inner = unsafe_backend(model)
-    @test MOI.get(inner, POI.ParametricObjectiveType()) == POI.ParametricCubicFunction{Float64}
-    pf = MOI.get(inner, POI.ParametricObjectiveFunction{POI.ParametricCubicFunction{Float64}}())
+    @test MOI.get(inner, POI.ParametricObjectiveType()) ==
+          POI.ParametricCubicFunction{Float64}
+    pf = MOI.get(
+        inner,
+        POI.ParametricObjectiveFunction{POI.ParametricCubicFunction{Float64}}(),
+    )
     @test pf isa POI.ParametricCubicFunction{Float64}
     return
 end