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[Bridges] throw GetAttributeNotAllowed in ZerosBridge #2863

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Merged
merged 1 commit into from
Oct 5, 2025
Merged

[Bridges] throw GetAttributeNotAllowed in ZerosBridge #2863

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8 changes: 4 additions & 4 deletions src/Bridges/Variable/bridges/ZerosBridge.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -90,16 +90,16 @@ end

function MOI.get(
::MOI.ModelLike,
::MOI.ConstraintDual,
attr::MOI.ConstraintDual,
::ZerosBridge{T},
) where {T}
return error(
msg =
"Unable to query the dual of a variable bound that was reformulated " *
"using `ZerosBridge`. This usually arises in conic solvers when a " *
"variable is fixed to a value. As a work-around, instead of creating " *
"a fixed variable using variable bounds like `p == 1`, add an affine " *
"equality constraint like `1 * p == 1` (or `[1 * p - 1,] in Zeros(1)`).",
)
"equality constraint like `1 * p == 1` (or `[1 * p - 1,] in Zeros(1)`)."
return throw(MOI.GetAttributeNotAllowed(attr, msg))
end

function MOI.get(
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3 changes: 2 additions & 1 deletion test/Bridges/Variable/zeros.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -175,7 +175,8 @@ function test_zeros()
@test MOI.get(bridged_mock, MOI.ConstraintDual(), c1) == 0.0
@test MOI.get(bridged_mock, MOI.ConstraintDual(), c2) == 1.0
attr = MOI.ConstraintDual()
err = ErrorException(
err = MOI.GetAttributeNotAllowed(
attr,
"Unable to query the dual of a variable bound that was reformulated " *
"using `ZerosBridge`. This usually arises in conic solvers when a " *
"variable is fixed to a value. As a work-around, instead of creating " *
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