feat: enforce strict CamelCase for Table names

Author: ethho

datajoint/table.py

@@ -75,6 +75,10 @@ class Table(QueryExpression):
     def table_name(self):
         return self._table_name
 
+    @property
+    def class_name(self):
+        return self.__class__.__name__
+
     @property
     def definition(self):
         raise NotImplementedError(
@@ -93,6 +97,14 @@ def declare(self, context=None):
                 "Cannot declare new tables inside a transaction, "
                 "e.g. from inside a populate/make call"
             )
+        # Enforce strict CamelCase #1150
+        if "_" in self.class_name:
+            raise DataJointError(
+                "Table with class name `{name}` contains an underscore. ".format(
+                    name=self.class_name
+                ) +
+                "Classes defining tables should be formatted in strict CamelCase."
+            )
         sql, external_stores = declare(self.full_table_name, self.definition, context)
         sql = sql.format(database=self.database)
         try:

tests/test_declare.py

@@ -356,6 +356,6 @@ class Table_With_Underscores(dj.Manual):
         """
 
     schema_any(TableNoUnderscores)
-    with pytest.raises(dj.DataJointError, match="CamelCase") as e:
+    with pytest.raises(dj.DataJointError, match="strict CamelCase") as e:
         schema_any(Table_With_Underscores)