From c42178f0e2bdd0dcf91154569d11416f10a7aeef Mon Sep 17 00:00:00 2001
From: Oscar Dowson <o.dowson@gmail.com>
Date: Wed, 8 Oct 2025 15:32:30 +1300
Subject: [PATCH] [Bridges] fix supports_constraint for IndicatorToMILPBridge

---
 .../bridges/IndicatorToMILPBridge.jl          |  2 +-
 .../Constraint/IndicatorToMILPBridge.jl       | 37 +++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/Bridges/Constraint/bridges/IndicatorToMILPBridge.jl b/src/Bridges/Constraint/bridges/IndicatorToMILPBridge.jl
index bd05ebfe1b..8056af283b 100644
--- a/src/Bridges/Constraint/bridges/IndicatorToMILPBridge.jl
+++ b/src/Bridges/Constraint/bridges/IndicatorToMILPBridge.jl
@@ -81,7 +81,7 @@ end
 function MOI.Bridges.added_constrained_variable_types(
     ::Type{<:IndicatorToMILPBridge},
 )
-    return Tuple{Type}[(MOI.Reals,)]
+    return Tuple{Type}[(MOI.Reals,), (MOI.ZeroOne,)]
 end
 
 function MOI.Bridges.added_constraint_types(
diff --git a/test/Bridges/Constraint/IndicatorToMILPBridge.jl b/test/Bridges/Constraint/IndicatorToMILPBridge.jl
index d29ab62d30..f5f4acc56b 100644
--- a/test/Bridges/Constraint/IndicatorToMILPBridge.jl
+++ b/test/Bridges/Constraint/IndicatorToMILPBridge.jl
@@ -320,6 +320,43 @@ function test_runtests_error_not_binary()
     return
 end
 
+MOI.Utilities.@model(
+    Model2867,
+    (),
+    (MOI.EqualTo, MOI.LessThan),
+    (),
+    (),
+    (),
+    (MOI.ScalarAffineFunction,),
+    (),
+    ()
+)
+
+function MOI.supports_constraint(
+    model::Model2867,
+    ::Type{MOI.VariableIndex},
+    ::Type{<:Union{MOI.Integer,MOI.ZeroOne}},
+)
+    return get(model.ext, :supports, false)
+end
+
+function test_issue_2867()
+    model = MOI.instantiate(Model2867{Float64}; with_bridge_type = Float64)
+    @test !MOI.supports_constraint(
+        model,
+        MOI.VectorOfVariables,
+        MOI.Indicator{MOI.ACTIVATE_ON_ONE,MOI.EqualTo{Float64}},
+    )
+    model = MOI.instantiate(Model2867{Float64}; with_bridge_type = Float64)
+    model.model.ext[:supports] = true
+    @test MOI.supports_constraint(
+        model,
+        MOI.VectorOfVariables,
+        MOI.Indicator{MOI.ACTIVATE_ON_ONE,MOI.EqualTo{Float64}},
+    )
+    return
+end
+
 end  # module
 
 TestConstraintIndicatorToMILP.runtests()