[Fix] Handle missing geometry keys in latexify for lithium plating mo…

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 ## Bug fixes
 
+- Fixes `KeyError: 'min'` in `latexify()` for lithium plating models when certain geometry keys are missing. ([#5245](https://github.com/pybamm-team/PyBaMM/pull/5245))
 - Adds `options` property to IDAKLU, fixes pickling issue with `__getstate__` when keys are not available. ([#5234](https://github.com/pybamm-team/PyBaMM/pull/5234))
 - Fixed a bug where simulations using output variables in `IDAKLUSolver` couldn't be pickled ([#5225](https://github.com/pybamm-team/PyBaMM/pull/5225))
 - Added explicit warning in installation docs about unmaintained Conda recipe due to pybammsolvers split (Fixes #5155). See pull request [#5206](https://github.com/pybamm-team/PyBaMM/pull/5206)

src/pybamm/expression_tree/operations/latexify.py

@@ -74,11 +74,17 @@ def _get_geometry_displays(self, var):
         for var_name, rng in self.model.default_geometry[var.domain[0]].items():
             # Trim name (r_n --> r)
             name = re.findall(r"(.)_*.*", str(var_name))[0]
-            rng_min = get_rng_min_max_name(rng, "min")
+            if "min" in rng:
+                rng_min = get_rng_min_max_name(rng, "min")
+            else:
+                continue
 
         # Take range maximum from the last domain
         for _, rng in self.model.default_geometry[var.domain[-1]].items():
-            rng_max = get_rng_min_max_name(rng, "max")
+            if "max" in rng:
+                rng_max = get_rng_min_max_name(rng, "max")
+            else:
+                continue
 
         geo_latex = rf"\quad {rng_min} < {name} < {rng_max}"
         geo.append(geo_latex)

tests/unit/test_expression_tree/test_operations/test_latexify.py

@@ -92,3 +92,8 @@ def test_sympy_preview(self):
             filename = f"{uuid.uuid4()}.{ext}"
             model_spme.latexify(filename)
             os.remove(filename)
+
+    def test_latexify_with_lithium_plating(self):
+        model = pybamm.lithium_ion.SPM(options={"lithium plating": "irreversible"})
+        # Should not raise KeyError
+        model.latexify()