Can I query is_continuous about a JuMP model?

[WalterMadelim]

Yes, this is a good idea. It can also simplify this function you wrote

@odow

For example, at the cost of an extra argument, you could use a function:

function optimize!_and_assert_optimality(model, name)
    JuMP.optimize!(model)
    if (status = JuMP.termination_status(model)) != JuMP.OPTIMAL
        error("$name: $status")
    end
end

optimize!_and_assert_optimality(model_123, "model_123")

One place where the function approach would be better is:

models = Dict("A" => model_123, "B" => model456)
for (name, model) in models
    @optimise_assert_optimal model
    # or
    optimize!_and_assert_optimality(model, name)
end