Error message for failing to create model in model-equation endpoint (D…

…ARPA-ASKEM#173)

src/SimulationService.jl

@@ -128,9 +128,7 @@ function start!(; host=HOST[], port=PORT[], kw...)
     JobSchedulers.set_scheduler(max_cpu=JobSchedulers.SCHEDULER_MAX_CPU, max_mem=0.5, update_second=0.05, max_job=5000)
     Oxygen.resetstate()
 
-
-    Oxygen.@get     "/model-equation/{id}"  modelEquation
-    Oxygen.@post    "/model-equation"       modelToEquation
+    Oxygen.@get     "/model-equation/{id}"  model_equation
 
     Oxygen.@get     "/health"               health
     Oxygen.@get     "/status/{id}"          job_status
@@ -220,17 +218,21 @@ function job_kill(::HTTP.Request, id::String)
 end
 
 # GET /model-equation/{id}
-function modelEquation(::HTTP.Request, id::String)
+function model_equation(::HTTP.Request, id::String)
     @assert ENABLE_TDS[]
 
     tds_url = "$(TDS_URL[])/models/$id"
     model_json = JSON3.read(HTTP.get(tds_url, [basic_auth_header[], json_content_header, snake_case_header]).body)
-    sys = amr_get(model_json, ODESystem)
 
-    model_latex = latexify(sys)
-    return Dict([
-        (:latex, model_latex.s)
-    ])
+    try 
+        sys = amr_get(model_json, ODESystem)
+
+        model_latex = latexify(sys)
+    catch ex
+        error_string = sprint(showerror,ex)
+        return HTTP.Response(500, "/model-equation failure.  Server error: $error_string")
+    end
+    return Dict([(:latex, model_latex.s)])
 end
 
 # POST /model-equation

src/operations.jl

@@ -7,14 +7,14 @@
 # Get `ModelingToolkit.ODESystem` from AMR
 
 function amr_get(amr::JSON3.Object,::Type{ODESystem})
-        schema_url = amr.header.schema
-        if contains(schema_url,"petrinet_schema")
+    schema_url = amr.header.schema
+    if contains(schema_url,"petrinet_schema")
             return amr_get_petrinet(amr)
-        elseif contains(schema_url, "stockflow_schema")
-            return amr_get_stockflow(amr)
-        elseif  contains(schema_url,"regnet_schema")
-            return amr_get_regnet(amr)
-        end
+    elseif contains(schema_url, "stockflow_schema")
+        return amr_get_stockflow(amr)
+    elseif  contains(schema_url,"regnet_schema")
+        return amr_get_regnet(amr)
+    end  
 end
 
 function amr_get_stockflow(amr::JSON3.Object)