fix: don't freeze if model is chunked

Author: coroa

linopy/model.py

@@ -890,12 +890,10 @@ def add_constraints(
         data = data.assign_attrs(label_range=(start, end), name=name)
 
         if self.chunk:
-            if freeze:
-                raise ValueError("Chunked constraints cannot be frozen")
             data = data.chunk(self.chunk)
 
         constraint = MutableConstraint(data, name=name, model=self, skip_broadcast=True)
-        return self.constraints.add(constraint, freeze=freeze)
+        return self.constraints.add(constraint, freeze=freeze and not self.chunk)
 
     def add_objective(
         self,

test/test_constraints.py

@@ -116,9 +116,7 @@ def test_constraint_assignment_chunked() -> None:
     lower = pd.DataFrame(np.zeros((10, 10)))
     upper = pd.Series(np.ones(10))
     x = m.add_variables(lower, upper)
-    with pytest.raises(ValueError, match="Chunked constraints cannot be frozen"):
-        m.add_constraints(x, GREATER_EQUAL, 0, name="c")
-    m.add_constraints(x, GREATER_EQUAL, 0, name="c", freeze=False)
+    m.add_constraints(x, GREATER_EQUAL, 0, name="c")
     assert m.constraints.coeffs.c.data.shape == (
         10,
         10,