Add fallback for unsupported Name attribute (#3017)

jump-dev · Jul 14, 2022 · e90c9d6 · e90c9d6
1 parent 8af2d3f
commit e90c9d6
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Showing 2 changed files with 14 additions and 2 deletions.
diff --git a/src/print.jl b/src/print.jl
@@ -131,8 +131,11 @@ default if empty.
 name(model::AbstractModel) = "An Abstract JuMP Model"
 
 function name(model::Model)
-    ret = MOI.get(model, MOI.Name())
-    return isempty(ret) ? "A JuMP Model" : ret
+    if MOI.supports(backend(model), MOI.Name())
+        ret = MOI.get(model, MOI.Name())
+        return isempty(ret) ? "A JuMP Model" : ret
+    end
+    return "A JuMP Model"
 end
 
 """

diff --git a/test/print.jl b/test/print.jl
@@ -942,6 +942,15 @@ function test_print_IJulia_with_math_operators()
     return
 end
 
+struct _UnsupportedNameOptimizer <: MOI.AbstractOptimizer end
+MOI.is_empty(::_UnsupportedNameOptimizer) = true
+
+function test_Name_direct_mode()
+    model = direct_model(_UnsupportedNameOptimizer())
+    @test name(model) == "A JuMP Model"
+    return
+end
+
 end
 
 TestPrint.runtests()