Fixed bug related to investmentdata for hydro reservoirs and level parameter. (#78)

* The bug is only present when the Storage fieldnames are changed

* In the EMX repositories, this only affected HydroReservoir

Author: espenbodal

NEWS.md

@@ -1,5 +1,11 @@
 # Release notes
 
+## Unversioned
+
+### Bugfixes
+
+* Fix a bug in which field names for the capacities of a `Storage` node resulted in error message for the investment data checks.
+
 ## Version 0.9.3 (2025-10-23)
 
 ## Bugfixes

ext/EMIExt/checks.jl

@@ -53,14 +53,16 @@ function EMB.check_node_data(
         return
     end
 
-    for cap_fields ∈ fieldnames(typeof(data))
-        sub_data = getfield(data, cap_fields)
+    cap_map = Dict(:charge => charge, :level => level, :discharge => discharge)
+
+    for (cap, cap_fun) ∈ cap_map
+        sub_data = getfield(data, cap)
         isnothing(sub_data) && continue
         check_inv_data(
             sub_data,
-            EMB.capacity(getproperty(n, cap_fields)),
+            EMB.capacity(cap_fun(n)),
             𝒯,
-            " of field `" * String(cap_fields) * "`",
+            " of field `" * String(cap) * "`",
             check_timeprofiles,
         )
     end