fix(vtk): change in export_model when packages_names is None (#770)

model packages extraction change from ml.packageslist to model.packageslist

autotest/t069_test_vtkexportmodel.py

@@ -0,0 +1,34 @@
+"""
+Test vtk export_model function without packages_names definition 
+"""
+
+import os
+import flopy
+from flopy.export import vtk 
+
+mf_exe_name = 'mf6'
+
+def test_vtk_export_model_without_packages_names():
+
+    ws = os.path.join('.', 'temp', 't069')
+    name = 'mymodel'
+    sim = flopy.mf6.MFSimulation(sim_name=name, sim_ws=ws, exe_name='mf6')
+    tdis = flopy.mf6.ModflowTdis(sim)
+    ims = flopy.mf6.ModflowIms(sim)
+    gwf = flopy.mf6.ModflowGwf(sim, modelname=name, save_flows=True)
+    dis = flopy.mf6.ModflowGwfdis(gwf, nrow=10, ncol=10)
+    ic = flopy.mf6.ModflowGwfic(gwf)
+    npf = flopy.mf6.ModflowGwfnpf(gwf, save_specific_discharge=True)
+    chd = flopy.mf6.ModflowGwfchd(gwf, stress_period_data=[[(0, 0, 0), 1.],
+                                                           [(0, 9, 9), 0.]])
+
+    # Export model without specifying packages_names parameter
+    vtk.export_model(sim.get_model(), ws)
+
+    # If the function executes without error then test was successful
+    assert True
+
+if __name__ == '__main__':
+    test_vtk_export_model_without_packages_names()
+
+

flopy/export/vtk.py

@@ -1543,7 +1543,7 @@ def export_model(model, ot_folder, package_names=None, nanval=-1e+20,
         if not isinstance(package_names, list):
             package_names = [package_names]
     else:
-        package_names = [pak.name[0] for pak in ml.packagelist]
+        package_names = [pak.name[0] for pak in model.packagelist]
 
     if not os.path.exists(ot_folder):
         os.mkdir(ot_folder)