Can I submit multiple constraints in the callback function？

[Klaixiya]

I have created a callback function in which I need to submit multiple constraints at a time, but I am getting the following error:

  per_constrait = [sum(ramsey42[:matrix_42][cliques, cliques]) for cliques in max_clique]

  con = @build_constraint(
      per_constrait .<= allow_max_cliques^2 - allow_max_cliques - 1,
  )


  MOI.submit(ramsey42, MOI.LazyConstraint(cb_data),  con)


ERROR: MethodError: no method matching submit(::Model, ::MathOptInterface.LazyConstraint{GLPK.CallbackData}, ::Vector{AffExpr}, ::MathOptInterface.LessThan{Float64})
Closest candidates are:
  submit(::MathOptInterface.Utilities.MockOptimizer, ::MathOptInterface.AbstractSubmittable, ::Any...) at C:\Users\m\.julia\packages\MathOptInterface\864xP\src\Utilities\mockoptimizer.jl:906
  submit(::MathOptInterface.Utilities.CachingOptimizer, ::MathOptInterface.AbstractSubmittable, ::Any...) at C:\Users\m\.julia\packages\MathOptInterface\864xP\src\Utilities\cachingoptimizer.jl:1263
  submit(::MathOptInterface.Bridges.AbstractBridgeOptimizer, ::MathOptInterface.AbstractSubmittable, ::Any...) at C:\Users\m\.julia\packages\MathOptInterface\864xP\src\Bridges\bridge_optimizer.jl:1983
  ...

So I want to know if there is a way to submit multiple constraints at once，Thanks for any kind offer!

[odow]

So I want to know if there is a way to submit multiple constraints at once

No. The MOI.submit supports only a single constraint.

You will need to write a loop:

for c in con
    MOI.submit(ramsey42, MOI.LazyConstraint(cb_data),  c)
end

If you have any other questions, please them on our forum, https://jump.dev/forum. We try to keep the GitHub issues for bug reports.

[Klaixiya]

Ok, I tried the advice you gave and it did work, thanks!

[odow]

Great! Closing because this seems resolved. Please post on the forum if you have other questions.